Two studies were conducted to evaluate the effects of diet on phosphorus (P) digestion in dairy cattle. The objective of the first study was to evaluate the effects of forage and non-fiber carbohydrate (NFC) content on total P (TP) and inositol phosphates-P (IPs-P) digestion. Samples of feed, duodenal digesta and feces from a previously conducted study were analyzed for TP and IPs-P. In this study, eight lactating Holstein cows were fed diets containing either 60 or 35% forage and either 30 or 40% NFC in a 2 × 2 factorial with replicated 4 × 4 Latin square design. Dietary TP content (% DM) was 0.35, 0.36, 0.36, 0.36 and dietary IPs-P content (%DM) was 0.08, 0.13, 0.06, 0.11 for diets with forage: NFC ratio 35:30, 35:40, 60:30, and 60:40, respectively. Increasing dietary forage content decreased IPs-P and TP intake, fecal TP excretion, and total tract IPs-P digestibility (72.4 vs. 61.4%). Fecal IPs-P excretion tended to decrease as increasing forage content. Duodenal IPs-P and TP flow and apparent TP digestibility were unaffected by forage content. Increasing dietary NFC content increased IPs-P and TP intake, duodenal IPs-P flow, fecal IPs-P excretion, total tract IPs-P digestibility (61.4 vs. 72.4%), and apparent TP digestibility (32.8 vs. 41.6%). Dietary forage and NFC content affected IPs-P and TP digestion. The second study was to evaluate the effects of increasing dietary beet pulp (BP) content to replace high moisture corn (HMC) on ruminal and post-ruminal digestion of TP and IPs-P. Eight lactating Holstein cows were fed diets containing 0, 6.1, 12.1 or 24.3% BP in a replicated 4 × 4 Latin square design. Samples of rumen contents, duodenal digesta, and feces from this previously conducted study were analyzed for TP and IPs-P content. Linear and quadratic effects of BP content were analyzed using Proc Mixed of SAS. Dietary TP and IPs-P content were reduced linearly with increasing BP (0.59, 0.58, 0.57, 0.56% TP and 0.15, 0.14, 0.13, 0.11% IPs-P). Intake, ruminal content, and rumen pool size of TP decreased with increasing BP content. Digestion of TP and duodenal flow and fecal excretion of IPs-P and TP were not affected. With increasing dietary BP content, IPs-P intake was reduced, ruminal IPs-P pool size was reduced, and rumen turnover time (h) of IPs-P was increased. Apparent ruminal IPs-P digestibility (36.5, 31.8, 24.6, 13.6 %) and apparent total tract IPs-P digestibility (85.3, 82.7, 82.1, 79.1%) decreased linearly with increasing BP. Fecal excretion of IPs-P averaged 5.2 g/d. Replacing HMC with BP reduced digestion of IPs-P. The majority of IPs-P disappearance occurred post-ruminally. In conclusion, dietary BP, forage, and NFC content affected IPs-P digestion in dairy cows. / Master of Science

As gorduras são componentes importantes em dietas para carnívoros, porém o aproveitamento pelos animais sofre influência de fatores inerentes à composição das dietas, principalmente fibras e minerais, que precisam ser melhor estudados. Os trabalhos que avaliam as perdas endógenas de gordura nas fezes (PEGF) e os efeitos na digestibilidade aparente da gordura são escassos e divergentes. Desta forma, os objetivos destes estudos foram: determinar as PEGF em cães e mink; utilizar as PEGF para obtenção dos valores de digestibilidade verdadeira da gordura; além de avaliar os efeitos da composição de fibras dietéticas e a inclusão de emulsificantes no aproveitamento da gordura por cães. No primeiro estudo, as PEGF foram mensuradas em cães adultos. Dietas com níveis crescentes de gordura de frango foram utilizadas e as PEGF dos cães foram determinadas a partir de análises de regressão. As PEGF foram expressas em relação ao peso corporal (PC) dos animais, 155 mg/kg PV/dia, ou em relação ao consumo de gordura na matéria seca (MS), 7,9 g/kg MS consumida. A digestibilidade aparente total da gordura apresentou aumento conforme o consumo. A digestibilidade verdadeira total da gordura, corrigida para PEGF, não variou mediante o consumo de gordura. A relação entre PEGF e consumo de gordura foi maior em dietas com baixa gordura e explica o aumento na digestibilidade aparente da gordura quando concentrações maiores são consumidas. No segundo estudo, as PEGF foram determinadas em mink. Dietas com níveis crescente de óleo de soja foram formuladas e as PEGF avaliadas por regressão. Foi obtido o valor de 0,5 g/100g MS consumida, próximo ao relatado em cães. No terceiro estudo foi avaliada a influência das fibras dietéticas e da lecitina de soja na digestibilidade aparente da gordura em dietas para cães adultos. Foram avaliadas três fontes de carboidratos, amido de milho, celulose e polpa de beterraba, combinadas ou não à lecitina de soja. A polpa de beterraba reduziu a digestibilidade aparente e verdadeira da gordura em cães, aumentou o teor de umidade e elevou o escore fecal, porém ainda dentro da faixa considerada ideal. A lecitina de soja não apresentou efeito de melhora na digestibilidade dos macronutrientes e da energia das dietas. / Fats are important components of carnivores diets, however inherent factors of diets composition, mainly fibers and minerals, may affect its use by the animals, requiring further studies. Studies evaluating endogenous fat loss (EFL) and the effects on apparent total tract digestibility of fat are limited and divergent. The objectives of these studies were: to determine the EFL in dogs and mink; apply the EFL to calculated the true total tract digestibility of fats; and to evaluate the effects of dietary fiber composition and an emulsifying agent on fats digestibility in dogs. On the first study, the EFL was evaluated in adult dogs. Diets with increasing levels of poultry fat were used and the EFL was determined by regression analysis. The EFL was obtained according to the dogs’ body weight (BW) as 155 mg/kg BW/day, or according to dry matter (DM) fat intake, as 7.9 g/kg DM intake. The apparent total tract digestibility of fat increases according to the intake level. However, the true total tract digestibility of fat, EFL corrected, remained unaffected by fat intake. The relation between EFL and fat intake is higher for low fat diets and explains why the apparent digestibility increases according to intake. On the second study, the EFL was measured in mink. Diets with graded levels of soybean oil were offered and the EFL evaluated by regression. The value of 0.5 g/100 g DM intake was obtained, close to the reported with dogs. The third study assessed the influences of dietary fibers and soy lecithin on apparent total tract digestibility of fat in adult dog diets. Were evaluated three carbohydrate sources; corn starch, cellulose and beet pulp; combined or not with soy lecithin. The beet pulp decreased apparent and true total tract digestibility of fat in dogs, increased the moisture level of faeces and the faecal score, yet the faeces still had good quality. The soy lecithin did not improve digestibility of macronutrients and energy of diets.

As gorduras são componentes importantes em dietas para carnívoros, porém o aproveitamento pelos animais sofre influência de fatores inerentes à composição das dietas, principalmente fibras e minerais, que precisam ser melhor estudados. Os trabalhos que avaliam as perdas endógenas de gordura nas fezes (PEGF) e os efeitos na digestibilidade aparente da gordura são escassos e divergentes. Desta forma, os objetivos destes estudos foram: determinar as PEGF em cães e mink; utilizar as PEGF para obtenção dos valores de digestibilidade verdadeira da gordura; além de avaliar os efeitos da composição de fibras dietéticas e a inclusão de emulsificantes no aproveitamento da gordura por cães. No primeiro estudo, as PEGF foram mensuradas em cães adultos. Dietas com níveis crescentes de gordura de frango foram utilizadas e as PEGF dos cães foram determinadas a partir de análises de regressão. As PEGF foram expressas em relação ao peso corporal (PC) dos animais, 155 mg/kg PV/dia, ou em relação ao consumo de gordura na matéria seca (MS), 7,9 g/kg MS consumida. A digestibilidade aparente total da gordura apresentou aumento conforme o consumo. A digestibilidade verdadeira total da gordura, corrigida para PEGF, não variou mediante o consumo de gordura. A relação entre PEGF e consumo de gordura foi maior em dietas com baixa gordura e explica o aumento na digestibilidade aparente da gordura quando concentrações maiores são consumidas. No segundo estudo, as PEGF foram determinadas em mink. Dietas com níveis crescente de óleo de soja foram formuladas e as PEGF avaliadas por regressão. Foi obtido o valor de 0,5 g/100g MS consumida, próximo ao relatado em cães. No terceiro estudo foi avaliada a influência das fibras dietéticas e da lecitina de soja na digestibilidade aparente da gordura em dietas para cães adultos. Foram avaliadas três fontes de carboidratos, amido de milho, celulose e polpa de beterraba, combinadas ou não à lecitina de soja. A polpa de beterraba reduziu a digestibilidade aparente e verdadeira da gordura em cães, aumentou o teor de umidade e elevou o escore fecal, porém ainda dentro da faixa considerada ideal. A lecitina de soja não apresentou efeito de melhora na digestibilidade dos macronutrientes e da energia das dietas. / Fats are important components of carnivores diets, however inherent factors of diets composition, mainly fibers and minerals, may affect its use by the animals, requiring further studies. Studies evaluating endogenous fat loss (EFL) and the effects on apparent total tract digestibility of fat are limited and divergent. The objectives of these studies were: to determine the EFL in dogs and mink; apply the EFL to calculated the true total tract digestibility of fats; and to evaluate the effects of dietary fiber composition and an emulsifying agent on fats digestibility in dogs. On the first study, the EFL was evaluated in adult dogs. Diets with increasing levels of poultry fat were used and the EFL was determined by regression analysis. The EFL was obtained according to the dogs’ body weight (BW) as 155 mg/kg BW/day, or according to dry matter (DM) fat intake, as 7.9 g/kg DM intake. The apparent total tract digestibility of fat increases according to the intake level. However, the true total tract digestibility of fat, EFL corrected, remained unaffected by fat intake. The relation between EFL and fat intake is higher for low fat diets and explains why the apparent digestibility increases according to intake. On the second study, the EFL was measured in mink. Diets with graded levels of soybean oil were offered and the EFL evaluated by regression. The value of 0.5 g/100 g DM intake was obtained, close to the reported with dogs. The third study assessed the influences of dietary fibers and soy lecithin on apparent total tract digestibility of fat in adult dog diets. Were evaluated three carbohydrate sources; corn starch, cellulose and beet pulp; combined or not with soy lecithin. The beet pulp decreased apparent and true total tract digestibility of fat in dogs, increased the moisture level of faeces and the faecal score, yet the faeces still had good quality. The soy lecithin did not improve digestibility of macronutrients and energy of diets.

As gorduras são componentes importantes em dietas para carnívoros, porém o aproveitamento pelos animais sofre influência de fatores inerentes à composição das dietas, principalmente fibras e minerais, que precisam ser melhor estudados. Os trabalhos que avaliam as perdas endógenas de gordura nas fezes (PEGF) e os efeitos na digestibilidade aparente da gordura são escassos e divergentes. Desta forma, os objetivos destes estudos foram: determinar as PEGF em cães e mink; utilizar as PEGF para obtenção dos valores de digestibilidade verdadeira da gordura; além de avaliar os efeitos da composição de fibras dietéticas e a inclusão de emulsificantes no aproveitamento da gordura por cães. No primeiro estudo, as PEGF foram mensuradas em cães adultos. Dietas com níveis crescentes de gordura de frango foram utilizadas e as PEGF dos cães foram determinadas a partir de análises de regressão. As PEGF foram expressas em relação ao peso corporal (PC) dos animais, 155 mg/kg PV/dia, ou em relação ao consumo de gordura na matéria seca (MS), 7,9 g/kg MS consumida. A digestibilidade aparente total da gordura apresentou aumento conforme o consumo. A digestibilidade verdadeira total da gordura, corrigida para PEGF, não variou mediante o consumo de gordura. A relação entre PEGF e consumo de gordura foi maior em dietas com baixa gordura e explica o aumento na digestibilidade aparente da gordura quando concentrações maiores são consumidas. No segundo estudo, as PEGF foram determinadas em mink. Dietas com níveis crescente de óleo de soja foram formuladas e as PEGF avaliadas por regressão. Foi obtido o valor de 0,5 g/100g MS consumida, próximo ao relatado em cães. No terceiro estudo foi avaliada a influência das fibras dietéticas e da lecitina de soja na digestibilidade aparente da gordura em dietas para cães adultos. Foram avaliadas três fontes de carboidratos, amido de milho, celulose e polpa de beterraba, combinadas ou não à lecitina de soja. A polpa de beterraba reduziu a digestibilidade aparente e verdadeira da gordura em cães, aumentou o teor de umidade e elevou o escore fecal, porém ainda dentro da faixa considerada ideal. A lecitina de soja não apresentou efeito de melhora na digestibilidade dos macronutrientes e da energia das dietas. / Fats are important components of carnivores diets, however inherent factors of diets composition, mainly fibers and minerals, may affect its use by the animals, requiring further studies. Studies evaluating endogenous fat loss (EFL) and the effects on apparent total tract digestibility of fat are limited and divergent. The objectives of these studies were: to determine the EFL in dogs and mink; apply the EFL to calculated the true total tract digestibility of fats; and to evaluate the effects of dietary fiber composition and an emulsifying agent on fats digestibility in dogs. On the first study, the EFL was evaluated in adult dogs. Diets with increasing levels of poultry fat were used and the EFL was determined by regression analysis. The EFL was obtained according to the dogs’ body weight (BW) as 155 mg/kg BW/day, or according to dry matter (DM) fat intake, as 7.9 g/kg DM intake. The apparent total tract digestibility of fat increases according to the intake level. However, the true total tract digestibility of fat, EFL corrected, remained unaffected by fat intake. The relation between EFL and fat intake is higher for low fat diets and explains why the apparent digestibility increases according to intake. On the second study, the EFL was measured in mink. Diets with graded levels of soybean oil were offered and the EFL evaluated by regression. The value of 0.5 g/100 g DM intake was obtained, close to the reported with dogs. The third study assessed the influences of dietary fibers and soy lecithin on apparent total tract digestibility of fat in adult dog diets. Were evaluated three carbohydrate sources; corn starch, cellulose and beet pulp; combined or not with soy lecithin. The beet pulp decreased apparent and true total tract digestibility of fat in dogs, increased the moisture level of faeces and the faecal score, yet the faeces still had good quality. The soy lecithin did not improve digestibility of macronutrients and energy of diets.

This experiment was conducted to determine the effects of corn silage hybrids and nonforage fiber sources (NFFS) in high forage diets formulated with high dietary proportion of alfalfa hay (AH) and corn silage (CS) on ruminal fermentation and productive performance by early lactating dairy cows. Eight multiparous Holstein cows (4 ruminally fistulated) averaging 36 ± 6.2 d in milk were used in a duplicated 4 × 4 Latin square design experiment with a 2 × 2 factorial arrangement of treatments. Cows were fed 1 of 4 dietary treatments during each of the four 21-d periods. Treatments were: 1) conventional corn silage (CCS)-based diet without NFFS, 2) CCS-based diet with NFFS, 3) brown midrib corn silage (BMRCS)-based diet without NFFS, and 4) BMRCS-based diet with NFFS. Diets were isonitrogenous and isocaloric. Sources of NFFS consisted of ground soyhulls and pelleted beet pulp to replace a portion of AH and CS in the diets. In vitro 30-h NDF degradability was greater for BRMCS than CCS (42.3 vs. 31.2%). Neither CS hybrids nor NFFS affected intake of DM and nutrients. Digestibility of N, NDF, and ADF tended to be greater for cows consuming CCS-based diets. Milk yield was not influenced by CS hybrids and NFFS. However, a tendency for an interaction between CS hybrids and NFFS occurred with increasing milk yield due to feeding NFFS with the BMRCS-based diets. Yields of milk fat and 3.5% FCM decreased when feeding the BMRCS-based diet, and there was a tendency for an interaction between CS hybrids and NFFS by further decreased milk fat concentration because of feeding NFFS with BMRCS-based diet. Although feed efficiency (milk/DM intake) was not affected by corn silage hybrids and NFFS, there was an interaction between CS hybrids and NFFS because feed efficiency increased when NFFS was fed only with BMRCS-based diet. Total VFA production and individual molar proportion were not affected by diets. Dietary treatments did not influence ruminal pH profiles except that duration (h/d) of pH < 5.8 decreased when NFFS was fed in CCS-based diet but not in a BMRCS-based diet, causing a tendency for an interaction between CS hybrids and NFFS. Overall measurements in our study reveal that high forage NDF concentration (20% DM on average) may eliminate potentially positive effects of BMRCS. In the high forage diets, NFFS exerted limited effects on productive performance when they replaced AH and CS. Although the high quality AH provided adequate NDF (38.3% DM) for optimal rumen fermentative function, the low NDF concentration of the AH and the overall forage particle size reduced physically effective fiber and milk fat concentration.

Intégrée dans une unité de production de sucre et d'éthanol, la digestion anaérobie peut fournir une solution écologique pour traiter la matière organique tout en fournissant l'énergie qui peut, en partie, couvrir les besoins énergétiques de l'usine. L’objet de cette thèse de doctorat est la compréhension et l’optimisation de la méthanisation des coproduits de sucrerie et de distillerie de betterave dans l’optique d’une intégration industrielle du procédé. D’une part, la faisabilité de la digestion des pulpes en mono-substrat et sans dilution en réacteur parfaitement agité a été démontrée. La digestion thermophile s’est révélée efficace et stable jusqu’à une charge organique comprise entre 5 et 5,9 kg MO/m3.j. La biodégradabilité des pulpes est élevée, le taux d’abattement de matière organique de 88,1% et la production spécifique de méthane de 0,353 Nm3 CH4/kg MO. Des contraintes technologiques spécifiques aux pulpes, comme par exemple les phénomènes de moussage ou d’abrasion des pompes, ont été mises en évidence.D’autre part, la méthanisation des vinasses en conditions mésophiles a révélé les limites du procédé parfaitement agité. La charge maximale, autour de 3 kg DCO/m3.j, a permis d’obtenir une production spécifique de méthane de 0,353 Nm3 CH4/kg MO mais l’accumulation de sels d’acides gras volatils, y compris à faible charge organique, indique un déséquilibre entre les flores acidogène et méthanogène. D’un point de vue biologique, il semble que c’est la concentration élevée en sels des vinasses (C=31,7 mS/cm et [K]=14 g/L), qui représenterait le frein principal au développement et à l’activité des microorganismes. L’utilisation du modèle AM2, qui distingue deux phases, acidogénèse et méthanogénèse, a mis en évidence un faible taux de croissance spécifique des archées méthanogènes. L’extraction partielle des sels par électrodialyse a permis de lever une partie de cette inhibition, tandis que leur dilution a permis, à charge organique équivalente, de diminuer le temps de séjour d’un facteur 4 sans altérer les performances de la méthanisation, ceci en diminuant les concentrations en acétate et propionate dans le digesteur. Pour permettre l’intensification du procédé, le recyclage des microorganismes dans le digesteur a été étudié et a permis d’atteindre une charge organique de 6 à 7 kg DCO/m3.j. Enfin, la caractérisation des digestats de méthanisation a permis d’envisager leurs différentes voies de traitement (évapoconcentration, séparation solide/liquide,…) et de vérifier leurs caractéristiques agronomiques.En perspective, Cristal Union envisage la construction d’un démonstrateur permettant de tester différentes configurations à l’échelle industrielle. Le traitement successif des coproduits selon leur disponibilité, les pulpes en campagne sucrière, puis les vinasses en intercampagne, est envisagé. Les phases de transition entre ces deux périodes ont été étudiées et la faisabilité d’une alimentation mixte, sans réduction de la charge, démontrée. Dans cette optique, notre choix se porterait sur des conditions de température mésophiles, plus favorables au traitement d’un produit tel que les vinasses. Un système de recyclage de la biomasse est alors indispensable. / The growing international demand for energy and water constitutes a significant challenge for modern industry. Integrated in a sugar and ethanol factory, anaerobic digestion can provide an environmentally friendly solution by using organic matter co-products to provide energy that can partially cover the factory’s needs. The purpose of this doctoral thesis is the study of the anaerobic digestion of sugar beet pulps and distillery vinasses. We used a multiscale approach to achieve the two main objectives: understanding the biological phenomena involved and analyzing the technological problems that can occur in the digesters. We first demonstrated the feasibility of the anaerobic digestion of beet pulps in a continuously stirred tank reactor (CSTR) without water addition. Thermophilic digestion was effective and we achieved a high degradation of pulps with satisfactory biogas yields. The thermophilic process could operate stably up to an organic loading rate of 5 to 5,9 kg VS.m-3.d-1. The biodegradability of pulps was very high and allowed to obtain a VS destruction of 88,1% with a specific methane production of 0,353 Nm3 CH4.kg-1 VS. Next, the mesophilic anaerobic digestion of vinasses revealed the limits of the CSTR process for the treatment of this high strength distillery wastewater. The maximum loading rate reached was between 2 and 3 kg COD.m-3.d-1, with a specific methane production of 0,344 Nm3 CH4.kg-1 VS. However, the accumulation of volatile fatty acid salts, even at low organic loading rates, indicated an imbalance between acidogenic and methanogenic microflora. From a biological perspective, we assumed that the high salt concentration of vinasses (up to 41,3 mS/cm) is the main obstacle to the development and activity of microorganisms, as a two-reaction model (AM2) showed low specific growth rate of methanogens. The partial extraction of salts by electrodialysis allowed to remove a part of this inhibition, while their dilution led, at equivalent organic loading rate, to the reduction of the residence time by a factor 4. This was achieved without decreasing methane yield, while also reducing concentrations of acetate and propionate in the digester. To enable process intensification, biomass recycling in the digester, after the centrifugation, was tested to compensate for their low specific growth rates; loading rates reached 7 kg COD.m-3.d-1. We subsequently put in place a strategy for digesters control, to ensure effective monitoring. Finally, we had to characterize the digestates and to consider their different treatment paths. (evapoconcentration, solid / liquid separation, ...) before final valorization. For the industrial scale up, we envisage the successive treatment of the coproducts according to their availability: pulps during the sugar campaign and then vinasses in the intercampaign. As such, we also studied the transition periods and demonstrated the feasibility of a mixed feed, without reducing the loading rate. For such a project, we would choose mesophilic temperature conditions, more favorable for the treatment of a product like vinasses. A system for biomass recycling, whose efficiency was demonstrated, must be installed when the vinasses are treated. The system needs to be compatible with the treatment of the two substrates proposed, for example centrifugation or filtration.

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Normal";mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-parent:"";mso-padding-alt:0cm 5.4pt 0cm 5.4pt;mso-para-margin-top:0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:10.0pt;mso-para-margin-left:0cm;line-height:115%;mso-pagination:widow-orphan;font-size:11.0pt;font-family:"Calibri","sans-serif";mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-ansi-language:EN-US;mso-fareast-language:EN-US;}</style><![endif]--><span lang="EN-US" style="font-size:10.0pt;line-height:115%;font-family:&quot;Cambria&quot;,&quot;serif&quot;;mso-ascii-theme-font:major-latin;mso-hansi-theme-font:major-latin;mso-bidi-font-family:&quot;Times New Roman&quot;">Primena različitih tretmana sa ciljem redukcije sadržaja nesaharoznih jedinjenja u melasi &scaron;ećerne repe potencijalan je metod za pobolj&scaron;anje parametara kvaliteta melase, lak&scaron;e sprovođenje procesa desaharifikacije melase i sprečavanje eventualnih nepoželjnih promena pri skladi&scaron;tenju melase. Stoga je predmet istraživanja ove disertacije redukovanje sadržaja nesaharoznih jedinjenja u melasi &scaron;ećerne repe upotrebom prirodnih adsorbenata mineralnog (različiti tipovi bentonita) i celuloznog (celuloza različitog stepena čistoće i modifikovani ekstrahovani rezanci &scaron;ećerne repe) porekla. Variranjem pH vrednosti sredine, suve materije melase i koncentracije primenjenog adsorbenta ispitan je sinergistički efekat uslova tretmana na stepen redukcije sadržaja nesaharoznih jedinjenja u melasi. Efikasnost sprovedenog tretmana utvrđena je na osnovu promena parametara kvaliteta melase i to boje, mutnoće, sadržaja saharoze, sadržaja suve materije i sadržaja pepela. </span></p><p class="MsoNormal" style="text-align:justify"><span lang="EN-US" style="font-size:10.0pt;line-height:115%;font-family:&quot;Cambria&quot;,&quot;serif&quot;;mso-ascii-theme-font:major-latin;mso-hansi-theme-font:major-latin;mso-bidi-font-family:&quot;Times New Roman&quot;">Na osnovu rezultata uočava se da je pozitivan uticaj kombinovanog dejstva upotrebljenih adsorbenata i uslova tretmana najizraženiji kod mutnoće i boje melase &scaron;to potvrđuje afinitet adsorbenata ka zadržavanju i/ili vezivanju bojenih materija. Takođe, navedeni pozitivan uticaj izražen je u manjoj ili većoj meri u zavisnosti od tipa primenjenog adsorbenta ali i uslova gde je uglavnom dominantan uticaj pH vrednosti </span></p><p><!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:RelyOnVML/> <o:AllowPNG/> </o:OfficeDocumentSettings></xml><![endif]--><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:DoNotShowRevisions/> <w:DoNotPrintRevisions/> <w:DoNotShowMarkup/> <w:DoNotShowComments/> <w:DoNotShowInsertionsAndDeletions/> <w:DoNotShowPropertyChanges/> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>EN-US</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:EnableOpenTypeKerning/> <w:DontFlipMirrorIndents/> <w:OverrideTableStyleHps/> </w:Compatibility> <m:mathPr> <m:mathFont m:val="Cambria Math"/> <m:brkBin m:val="before"/> <m:brkBinSub m:val="&#45;-"/> <m:smallFrac m:val="off"/> <m:dispDef/> <m:lMargin m:val="0"/> <m:rMargin m:val="0"/> <m:defJc m:val="centerGroup"/> <m:wrapIndent m:val="1440"/> <m:intLim m:val="subSup"/> <m:naryLim m:val="undOvr"/> </m:mathPr></w:WordDocument></xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" DefUnhideWhenUsed="true" DefSemiHidden="true" DefQFormat="false" DefPriority="99" LatentStyleCount="267"> <w:LsdException Locked="false" Priority="0" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="Normal"/> <w:LsdException Locked="false" Priority="9" SemiHidden="false" UnhideWhenUsed="false" QFormat="true" Name="heading 1"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 2"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 3"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 4"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 5"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 6"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 7"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 8"/> <w:LsdException Locked="false" Priority="9" QFormat="true" Name="heading 9"/> <w:LsdException Locked="false" Priority="39" Name="toc 1"/> <w:LsdException Locked="false" Priority="39" Name="toc 2"/> <w:LsdException Locked="false" Priority="39" Name="toc 3"/> <w:LsdException Locked="false" Priority="39" Name="toc 4"/> <w:LsdException Locked="false" Priority="39" Name="toc 5"/> <w:LsdException Locked="false" Priority="39" Name="toc 6"/> <w:LsdException Locked="false" Priority="39" Name="toc 7"/> <w:LsdException Locked=&qu / <p>&nbsp;</p><p class="MsoNormal" style="text-align:justify"><span lang="EN-US" style="font-size:10.0pt;line-height:115%;font-family:&quot;Cambria&quot;,&quot;serif&quot;;mso-fareast-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;">The application of different treatments aiming to reduce the content of non-sugar compounds in sugar beet molasses is a potential method for molasses quality enhancement, facilitation of molasses desugarization process and prevention of any undesirable changes during molasses storage. Therefore, the objective of this dissertation is to reduce the content of non-sugar compounds in sugar beet molasses by using natural adsorbents of mineral (different types of bentonite) and cellulosic (cellulose of different purity and modified sugar beet pulp) origin. By varying treatment conditions such as pH, molasses dry substance and the applied adsorbent concentration, the synergistic effect of the treatment conditions on the reduction efficiency of non-sugar compounds content in molasses was examined. The treatment effectiveness was determined based on changes in molasses quality parameters, namely color, turbidity, sucrose content, dry substance content and ash content.</span></p><p><!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:RelyOnVML/> <o:AllowPNG/> </o:OfficeDocumentSettings></xml><![endif]--></p><p><!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves/> <w:TrackFormatting/> <w:DoNotShowRevisions/> <w:DoNotPrintRevisions/> <w:DoNotShowMarkup/> <w:DoNotShowComments/> <w:DoNotShowInsertionsAndDeletions/> <w:DoNotShowPropertyChanges/> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF/> <w:LidThemeOther>EN-US</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <w:DontGrowAutofit/> <w:SplitPgBreakAndParaMark/> <w:EnableOpenTypeKerning/> <w:DontFlipMirrorIndents/> <w:OverrideTableStyleHps/> </w:Compatibility> <m:mathPr> <m:mathFont m:val="Cambria Math"/> <m:brkBin m:val="before"/> <m:brkBinSub m:val="&#45;-"/> <m:smallFrac m:val="off"/> <m:dispDef/> <m:lMargin m:val="0"/> <m:rMargin m:val="0"/> <m:defJc m:val="centerGroup"/> <m:wrapIndent m:val="1440"/> <m:intLim m:val="subSup"/> <m:naryLim m:val="undOvr"/> </m:mathPr></w:WordDocument></xml><![endif]--></p><p class="MsoNormal" style="text-align:justify"><span lang="EN-US" style="font-size:10.0pt;line-height:115%;font-family:&quot;Cambria&quot;,&quot;serif&quot;;mso-fareast-font-family:Calibri;mso-bidi-font-family:&quot;Times New Roman&quot;">According to the obtained results, the positive influence of the combined effect of applied adsorbents and treatment conditions is most pronounced for molasses quality parameters turbidity and colour, which confirms the applied adsorbents affinity towards coloured compounds retention or binding. Also, the stated positive influence is expressed to a greater or lesser extent depending on the type of adsorbent used as well as the conditions applied, where the influence of pH is mainly dominant.</span></p><p><!--[if gte mso 10]><style> /* Style Definitions */ table.MsoNormalTable{mso-style-name:"Table Normal";mso-tstyle-rowband-size:0;mso-tstyle-colband-size:0;mso-style-noshow:yes;mso-style-priority:99;mso-style-parent:"";mso-padding-alt:0cm 5.4pt 0cm 5.4pt;mso-para-margin-top:0cm;mso-para-margin-right:0cm;mso-para-margin-bottom:10.0pt;mso-para-margin-left:0cm;line-height:115%;mso-pagination:widow-orphan;font-size:11.0pt;font-family:"Calibri","sans-serif";mso-ascii-font-family:Calibri;mso-ascii-theme-font:minor-latin;mso-hansi-font-family:Calibri;mso-hansi-theme-font:minor-latin;mso-ansi-language:EN-US;mso-fareast-language:EN-US;}</style><![endif]--></p><p><!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:RelyOnVML/> <o:AllowPNG/> 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[ES] El principal objetivo de esta tesis fue evaluar el valor nutritivo de la pulpa granulada de remolacha (PR) producida en diferentes zonas azucareras de España. Inicialmente se caracterizó la composición química de PR procedentes del norte y sur de España, cosechadas en invierno y verano, respectivamente. Se compararon la composición química y el contenido de ácidos grasos y aminoácidos de 12 muestras de PR, agrupadas según su procedencia. La composición de la materia seca (MS) de la PR, se caracteriza por un bajo contenido en proteína cruda (8.7%), dentro del 62% de la fibra neutro detergente (FND), pero rica en FND (39.4%) y fibra soluble en detergente neutro (45.7%), y bajo en grasa bruta (1.2%) y almidón (0.9%). El análisis de componentes principales (CP) de los principales principios inmediatos indicó que ya los dos primeros CP explican el 62% de la variabilidad en la composición de la PR. Los valores de los autovectores de los CP indicaron un importante peso del contenido en almidón y FND en el primer CP y del contenido en cenizas en el segundo CP. Posteriormente se determinó la digestibilidad de un pienso control con sustitución de 20% de PR de cinco orígenes distintos, y su posible efecto en el valor nutritivo de estas PR para conejos de engorde. Se utilizaron 90 conejos de 42 días de edad con 1.49 ± 0.208 kg de peso vivo, alojados en jaulas metabólicas individuales y con alimentación ad libitum. La digestibilidad de los componentes de los piensos se determinó por el método convencional in vivo de recolección fecal total. La digestibilidad de cada una de las pulpas de remolacha se determinó mediante el método de sustitución. No se apreció efecto de la sustitución de componentes del pienso control por el 20% de PR de diferentes procedencias en el consumo voluntario de los conejos. La inclusión de PR en las dietas aumentó la digestibilidad de materia seca (MS), materia orgánica, energía bruta y de todas las fracciones fibrosas, y disminuyó la digestibilidad de la proteína bruta. Respecto al efecto de la procedencia, se observaron diferencias significativas (P<0.05) en la digestibilidad de todas las fracciones fibrosas, siendo la PR recolectada en verano la de mayor digestibilidad. El origen de la PR también afectó su valor nutritivo, con valores de energía digestible entre 11.8 y 14.5 MJ/kg MS y de proteína digestible entre 38 y 66 g/kg MS. Finalmente, para evaluar el efecto del nivel de inclusión de pulpa de remolacha, con o sin melaza, sobre el rendimiento del crecimiento, se utilizaron un total de 470 conejos de 28 días de edad, con 612.2 ± 103.4 gr. de peso vivo. Los animales fueron asignados aleatoriamente a cinco tratamientos dietéticos: Control, sin pulpa de remolacha; PR20 y PR40, con 20 y 40% de pulpa de remolacha sin melaza, respectivamente; y PRM20 y PRM40, con 20 y 40% de pulpa de remolacha con melaza, respectivamente. El consumo diario de alimento (CDA) y la ganancia media diaria (GMD) se controlaron a los 28, 49 y 59 días de edad. También se determinaron las características de la canal y del tracto digestivo a los 59 días de edad. La mortalidad y la morbilidad fueron controladas diariamente. La mortalidad durante el período de crecimiento fue mayor en los grupos PRM que en los PR (+9.2%; P<0,05). A mayor inclusión de PR, con o sin melaza, menor CDA y GMD de los animales, así como el rendimiento a la canal, la proporción de hígado y el porcentaje de grasa disecable de sus canales. Sin embargo, la mejor eficiencia alimenticia durante los últimos 10 días se obtuvo con el grupo PRM40. Respecto a los parámetros digestivos, cuanto mayor fue la inclusión de pulpa de remolacha, con o sin melaza, mayor el peso del tracto gastrointestinal vacío y ciego. De hecho, una mayor inclusión de pulpa de remolacha disminuyó el pH y la materia seca, y disminuyó el contenido total de ácidos grasos volátiles del ciego, más rico en ácido acético, pero más pobre en propiónico, isobutirico, isovalérico y valérico. / [CA] L'objectiu principal d'aquesta tesi era avaluar el valor nutritiu de la polpa granulada de remolatxa (PR) produïda en diferents zones de sucre d'Espanya. La composició química de PR del nord i del sud d'Espanya, recol·lectada a l'hivern i l'estiu, respectivament. Es va comparar la composició química i el contingut d'àcids grassos i aminoàcids de 12 mostres de PR, agrupades segons el seu origen. La matèria seca (MS) del PR es caracteritza per un baix contingut de proteïna crua (8,7%), dins del 62% de la fibra detergent neutra (FND), però ric en FND (39,4%) i fibra soluble en detergent neutre (45,7%) i baix en greixos bruts (1,2%) i midó (0,9%). L'anàlisi principal de components (CP) dels principals principis immediats va indicar que els dos primers CP ja expliquen el 62% de la variabilitat en la composició del PR. Els valors autovector CP van indicar un pes important del contingut de midó i FND al primer CP i del contingut de cendra al segon CP. Posteriorment, la digestibilitat d'un aliment de control es va determinar amb una substitució del 20% de PR de cinc orígens diferents i el seu possible efecte sobre el valor nutritiu d'aquests PR per engreixar conills. Es van utilitzar conills de 90 42 dies amb 1,49 ± 0,208 kg de pes corporal, allotjats en gàbies metabòliques individuals i amb alimentació ad libitum. La digestibilitat dels components dels pinsos va ser determinada pel mètode in vivo convencional de recol·lecció fecal total. La digestibilitat de cadascuna de les púlps de remolatxa es va determinar mitjançant el mètode de substitució. No hi va haver cap efecte apreciat de substituir els components de l'alimentació de control per un 20% de PR de diferents fonts sobre el consum voluntari de conills. La inclusió de PR en dietes va augmentar la digestibilitat de la matèria seca (MS), la matèria orgànica, l'energia crua i totes les fraccions fibroses i va disminuir la digestibilitat de la proteïna crua. Pel que fa a l'efecte de l'origen, es van observar diferències significatives (P < 0,05) en la digestibilitat de totes les fraccions fibroses, i el PR recollit a l'estiu és el que té la màxima digestibilitat. L'origen del PR també va afectar el seu valor nutritiu, amb valors d'energia digeribles entre 11,8 i 14,5 MJ / kg MS i proteïna digestible entre 38 i 66 g / kg MS. Finalment, sobre el rendiment del creixement, es van utilitzar un total de 470 conills de 28 dies, amb 612,2 ± 103,4 gr. de pes viu. Els animals van ser assignats aleatòriament a cinc tractaments dietètics: control, sense polpa de remolatxa; PR20 i PR40, amb polpa de remolatxa 20 i 40% sense melassa, respectivament; i PRM20 i PRM40, amb polpa de remolatxa de melassa del 20 i del 40%, respectivament. El consum diari d'aliments (CDA) i el benefici mitjà diari (GMD) es van controlar als 28, 49 i 59 dies d'edat. També es van determinar les característiques del canal i del tracte digestiu als 59 dies d'edat. La mortalitat i la morbiditat es controlaven diàriament. La mortalitat durant el període de creixement va ser superior als grups PRM que a la PR (+ 9,2%; P < 0,05). Com més gran sigui la inclusió de PR, amb o sense melassa, el CDA inferior i el GMD dels animals, així com el rendiment al canal, la proporció de fetge i el percentatge de greixos dissecables als vostres canals. Tanmateix, la millor eficiència alimentària durant els darrers deu dies es va obtenir amb el grup PRM40. Pel que fa als paràmetres digestius, com més gran sigui la inclusió de la polpa de remolatxa, amb o sense melassa, més gran sigui el pes del tracte gastrointestinal buit i cec. De fet, una major inclusió de la polpa de remolatxa va disminuir el pH i la matèria seca i va disminuir el contingut total d'àcids grassos volàtils al cec, més ric en àcid acètic, però més pobre en propionic, isobutiric, isoval I valeric, independentment de la temporada, proporciona un alt contingut de fibra, soluble i insoluble, tot i que no és una font important de proteïnes, aminoàcids o àcids grassos. / [EN] The main objective of this thesis was to evaluate the nutritional value of granulated beet pulp (PR) produced in different sugar-growing areas of Spain. Initially the chemical composition of PR from the north and south of Spain, harvested in winter and summer, respectively, was characterized. The chemical composition and fatty acid and amino acid content of 12 PR samples, grouped according to their origin, were compared. The composition of the dry matter (DM) of the PR is characterized by a low crude protein content (8.7%), within 62% of neutral detergent fiber (NDF), but rich in NDF (39.4%) and fiber. soluble in neutral detergent (45.7%), and low in crude fat (1.2%) and starch (0.9%). The analysis of principal components (PC) of the main immediate principles indicated that the first two PCs already explain 62% of the variability in the composition of the PR. The values of the CP eigenvectors indicated an important weight of the starch and NDF content in the first CP and the ash content in the second CP. Subsequently, the digestibility of a control feed with 20% replacement of PR from five different origins was determined, and its possible effect on the nutritional value of these PR for fattening rabbits. Ninety 42-day-old rabbits with 1.49 ± 0.208 kg live weight were used, housed in individual metabolic cages and fed ad libitum. The digestibility of feed components was determined by the conventional in vivo method of total fecal collection. The digestibility of each of the beet pulps was determined using the substitution method. No effect was seen of replacing components of the control feed with 20% PR from different sources on the voluntary consumption of the rabbits. The inclusion of PR in the diets increased the digestibility of dry matter (DM), organic matter, gross energy and all fibrous fractions, and decreased the digestibility of crude protein. Regarding the effect of origin, significant differences (P<0.05) were observed in the digestibility of all fibrous fractions, with the PR collected in summer being the one with the highest digestibility. The origin of PR also affected its nutritional value, with digestible energy values between 11.8 and 14.5 MJ/kg DM and digestible protein between 38 and 66 g/kg DM. Finally, to evaluate the effect of the level of inclusion of beet pulp, with or without molasses, on growth performance, a total of 470 rabbits of 28 days of age were used, with 612.2 ± 103.4 gr. live weight. The animals were randomly assigned to five dietary treatments: Control, without beet pulp; PR20 and PR40, with 20 and 40% beet pulp without molasses, respectively; and PRM20 and PRM40, with 20 and 40% beet pulp with molasses, respectively. Daily feed intake (DAI) and average daily gain (ADG) were monitored at 28, 49 and 59 days of age. The characteristics of the carcass and digestive tract were also determined at 59 days of age. Mortality and morbidity were monitored daily. Mortality during the growth period was higher in the PRM than in the PR groups (+9.2%; P<0.05). The greater the inclusion of PR, with or without molasses, the lower the ADC and ADG of the animals, as well as the carcass yield, the proportion of liver and the percentage of dissectable fat in their carcasses. However, the best feed efficiency during the last 10 days was obtained with the PRM40 group. Regarding the digestive parameters, the greater the inclusion of beet pulp, with or without molasses, the greater the weight of the empty and blind gastrointestinal tract. In fact a greater inclusion of beet pulp decreased the pH and dry matter, and decreased the total content of volatile fatty acids of the caecum, richer in acetic acid, but poorer in propionic, isobutyric, isovaleric and valeric acids. Regarding the effect of the harvest season on the chemical characteristics of granulated sugar beet pulp, regardless of the season, it provides high fiber content, soluble and insoluble, although it is not an important source of protein / Arce Cabrera, ON. (2024). Utilización de pulpa granulada de remolacha en la alimentación de conejos en cebo [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/206201