The purpose of this study was to investigate the quality of frying oil in eight randomly selected restaurants in Umeå. A further aim was to examine the techniques and control methods the various restaurants used. The methods used to answer the purpose was questionnaires, answered by the chefs, which was used to examine the procedures used in the handling of frying oils. To investigate the quality of the frying oils two types of quick tests were used, a Oxifrit-test and a TPM-test. The results showed that all food businesses had developed procedures for the handling of frying oils. Procedures for intermittent usage, change of frying oil, monitoring of the oil, cleaning and handling of frying oils after use existed at the eight restaurants. According to the recommendations of the Deutsche Gesellschaft für fettwissenschaft the observed routines does not meet all the criteria to achieve a good quality of frying oil, and therefore needs improvements. However the Oxifrit-test and TPM-test showed that the frying oils generally archive a good quality in the selected restaurants. There were only three restaurants where the oil should have been replaced. Further improvement of procedures might help to improve the quality of frying oil.

Frying in vegetable oil is a popular cooking and food processing method worldwide; as a result, the oils used for frying are widely consumed by the general public and it is of practical importance to better understand their health impacts. To date, the effects of frying oil consumption on human health are inconclusive, making it difficult to establish dietary recommendations or guidelines. Here we show that dietary administration of frying oil, which was prepared under the conditions of good commercial practice, exaggerated dextran sodium sulfate (DSS)-induced colitis in mice. In addition, to explore the potential compounds involved in the actions of the frying oil, we isolated polar compounds from the frying oil and found that administration of the polar compounds also exacerbated DSS-induced colitis in mice. Together, our results showed that dietary administration of frying oil exaggerated development of inflammatory bowel disease (IBD) in mice, and this effect could be mediated by the polar compounds in the frying oil.

Deep-frying is now a popular cooking method all over the world due to its low cost and time-saving property. It also provides special and likeable flavor, helps prolong shelf lives of commercial products, and offering food products of stable quality. However, by- products formed during the frying process, such as malonaldehyde, were shown to be harmful to human health. Such compounds can be taken in when having fried foods, potentially inducing or promoting some diseases. However, there is limited research studying the direct effects of frying oil consumption on cancer. In order to have a better understanding of the effects on cancer by frying oil, we used a well-established AOM/DSS- induced colon cancer animal model to study the impact by frying oil. After 10-week treatment with diet containing deep-frying oil (3.8% in diet) or with un-oxidized oil (10% in diet), the mice showed enhanced tumorigenesis in colon, where the total tumor burden significantly increased (4.5 ± 1.9 mm2 for the treatment group, compared with 0.5 ± 0.5 mm2 for the control group, P < 0.05). Also, the expression of pro-inflammatory and pro- tumorigenic cytokines (Mcp-1, Inf-γ, Il-6, Il-1β, Myc, Axin2 and Vegf) were increased in the mice treated with frying oil diets. Together the results showed that consumption of deep-frying oil promoted the colorectal cancer in mice, providing more detailed information for health instruction.

Biodiesel is now considered as an important option for full or partial diesel fossil replacement. At the same time, biodiesel is a renewable and an environmentally friendly fuel. This work has as goal to employ residual vegetable oils for biodiesel production and evaluate its viability as raw material. For that, some initial steps were considered in order to get a correct planning for the project: i) gathering and purification of the raw material; ii) determination of the physico-chemical properties of the residual oils; iii) choice of the catalytic system based on the quality of the raw material; iv) biodiesel production; and v) evaluation of the properties of the biofuel produced. The results of the frying oils characterization are in agreement with the requirements, not compromising their use for obtaining biodiesel. The biodiesel production was conducted by basic and acid catalysis in the presence of methanol or ethanol, as alcoholysis agents. The best results, in biodiesel production, were obtained for methanolysis conducted in the presence of basic catalyst. The results presented here show a concrete possibility of the use of frying oil as raw material for obtaining biodiesel, even if the sample has been collected in small establishments. / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / O biodiesel constitui, nos dias atuais, uma importante alternativa de substituição para o diesel fóssil, sendo ao mesmo tempo um combustível renovável e ambientalmente correto. O presente trabalho teve como objetivo empregar resíduos de óleos comestíveis para a obtenção de biodiesel e avaliar sua viabilidade como matéria prima. Para tanto, algumas etapas foram realizadas: (i) coleta e purificação adequadas da matéria-prima; (ii) determinação das propriedades físico-químicas dos óleos residuais; (iii) escolha do sistema catalítico a ser empregado, em função da qualidade desses; (iv) obtenção do biodiesel; e (v) avaliação da propriedade desse biocombustível. Através dos resultados obtidos para os óleos de fritura foi possível constatar que os mesmos, de uma maneira geral, atendem às necessidades, não comprometendo sua utilização para obtenção de biodiesel. A obtenção de biodiesel foi conduzida por catálise básica e ácida, na presença de metanol ou etanol, como agentes de alcoólise. Os melhores resultados, em termos de rendimento em éster, foram obtidos para a metanólise conduzida em presença de catalisador básico. Os resultados aqui apresentados permitem visualizar uma possibilidade concreta da utilização de óleos de fritura como matéria-prima para a obtenção de biodiesel, mesmo que a coleta tenha sido realizada em pequenos estabelecimentos.

Submitted by Ligia Linardi Niero Rocha null (ligialinardi@yahoo.com.br) on 2017-09-20T15:22:27Z No. of bitstreams: 1 dissertFICHAcatal.pdf: 1496895 bytes, checksum: 6610a394252f7529b5cbd64a98cedde0 (MD5) / Approved for entry into archive by Monique Sasaki (sayumi_sasaki@hotmail.com) on 2017-09-20T18:31:24Z (GMT) No. of bitstreams: 1 rocha_lln_me_bot.pdf: 1496895 bytes, checksum: 6610a394252f7529b5cbd64a98cedde0 (MD5) / Made available in DSpace on 2017-09-20T18:31:24Z (GMT). No. of bitstreams: 1 rocha_lln_me_bot.pdf: 1496895 bytes, checksum: 6610a394252f7529b5cbd64a98cedde0 (MD5) Previous issue date: 2017-07-31 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Os polihidroxialcanoatos (PHAs) são uma família de biopolímeros biodegradáveis, que podem substituir os plásticos petroquímicos em muitas aplicações, principalmente embalagens e utensílios domésticos. Contudo, estes bioplásticos são atualmente mais caros do que os de origem petroquímica. É possível encontrar vários estudos na literatura que investigam o uso de resíduos e substratos mais baratos, com o intuito de permitir a produção em grande escala do PHA. Os óleos vegetais são largamente utilizados na preparação de alimentos, na maioria das vezes no processo de fritura, o que acarreta grandes quantidades de resíduo, muitas vezes descartados incorretamente, trazendo prejuízo ao meio ambiente e à população. Sob esta consideração, os resíduos de óleo de fritura são abundantes e podem ser utilizados na produção de PHA sem qualquer tratamento adicional. Portanto, este trabalho analisou a produção de polihidroxialcanoatos (PHA) a partir de duas linhagens de bactérias, Pseudomonas oleovorans e Bacillus megaterium, utilizando-se óleos residuais de frituras como fonte de carbono (óleo residual de fritura de batata, frango e pastel) e foram utilizados nas concentrações de 10 g.l-1 e 20 g.l-1, separadamente. Os ensaios de produção do biopolímero foram realizados em frascos agitados, em meio de cultura limitante em nitrogênio. A massa seca celular (MSC) foi determinada por gravimetria e a porcentagem de acúmulo e a composição do PHA foram determinados por cromatografia gasosa. A melhor condição de reação foi observada no óleo residual de fritura de batata, no qual a bactéria Bacillus megaterium alcançou uma concentração de 13,03 % de acúmulo de PHA (% MSC) e 3,93 g.l-1 de massa seca celular. Pelos resultados obtidos pode-se concluir que esta alternativa é promissora, além de não competir com a produção baseada em fontes de açúcar, que é comercialmente utilizada. / Polyhydroxyalkanoates (PHAs) are a family of biodegradable biopolymers that can replace petrochemical plastics in many applications, especially packaging and household appliances. However, these bioplastics are currently more expensive than those of petrochemical origin. It is possible to find several studies in the literature that investigate the use of residues and cheaper substrates, in order to allow large scale production of the PHA. Vegetable oils are widely used in food preparation, most often in the frying process, which leads to large amounts of waste, often incorrectly discarded, causing damage to the environment and the population. Under this consideration, waste frying oils are abundant and can be used in the production of PHA without any further treatment. Therefore, this work studied the production of polyhydroxyalkanoates (PHA) from two strains of bacteria, Pseudomonas oleovorans and Bacillus megaterium, using waste frying oils as a source of carbon (waste oils from potato, chicken and pastel) and were used at concentrations of 10 g.l-1 and 20 g.l-1, separately. The biopolymer production assays were performed in shaken flasks, in nitrogen-limiting culture medium. The dry cell mass (DCM) was determined by gravimetry and the percentage of accumulation and the PHA composition were determined by gas chromatography. The best reaction condition was observed in the residual frying oil from potato, in which the bacterium Bacillus megaterium reached a PHA accumulation of 13.03 % and 3,93 g.l-1 of dry cell mass. From the results obtained it can be concluded that this alternative is promising, besides not competing with the production based on sources of sugar, that is commercially used.

Submitted by Alisson Mota (alisson.davidbeckam@gmail.com) on 2015-07-16T20:42:45Z No. of bitstreams: 1 Dissertação - Vanuza Oliveira dos Santos.pdf: 59417146 bytes, checksum: ff063d9ddb76102caeadc99ec2e0f6d3 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-07-20T14:24:33Z (GMT) No. of bitstreams: 1 Dissertação - Vanuza Oliveira dos Santos.pdf: 59417146 bytes, checksum: ff063d9ddb76102caeadc99ec2e0f6d3 (MD5) / Approved for entry into archive by Divisão de Documentação/BC Biblioteca Central (ddbc@ufam.edu.br) on 2015-07-20T14:28:08Z (GMT) No. of bitstreams: 1 Dissertação - Vanuza Oliveira dos Santos.pdf: 59417146 bytes, checksum: ff063d9ddb76102caeadc99ec2e0f6d3 (MD5) / Made available in DSpace on 2015-07-20T14:28:08Z (GMT). No. of bitstreams: 1 Dissertação - Vanuza Oliveira dos Santos.pdf: 59417146 bytes, checksum: ff063d9ddb76102caeadc99ec2e0f6d3 (MD5) Previous issue date: 2011-08-09 / CNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico / The frying process is a rapid procedure and appreciated by the population, in order to acquire the sensory enjoyable characteristics food. There are numerous substances that alter the oil and fried foods obtained by hydrolytic reactions, oxidative and thermoxidative. The intake of these substances are harmful to health and disposal in local inappropriate, such as, sinks / drains, creeks, drainage can aggravate environmental problems, as well as promoting the pollution of rivers, leading to increased cost of water treatment and sewage and the proliferation of insects. This work was conducted to assess the level of degradation of waste frying oils (OFR) and their use as feedstock for biodiesel production, providing a knowledge/technology field of transformation of residual oil for frying in our region and therefore add economic value to this waste and minimize environmental problems caused by their disposal. Different samples of frying oil waste restaurant, residence and pastry were collected and characterized by analytical methods according to Instituto Adolfo Lutz, the results of free fatty acids was below 1%, the average acid value of 1.25 mg KOH / g oil, peroxide index of less than 10 meq O2/kg oil, saponification index ranged from 110.13 to 228.6 mg KOH / g oil and iodine in the range 85.96 to 106.17 g I2.100g-1. The fatty acid composition of these oils was similar to that of refined soybean oil, with a predominance of palmitic acid (C16:0), oleic acid (C18:1) and linoleic acid (C18:2), representing over 80% of the composition these oils. The viscosity averaged 43.65 mm2.s-1 and the average density was 0.9210 g.cm-3, values similar to soybean oil. The pastry samples had values above these parameters, resulting from the polymerization of the oil. Samples of frying of residence in relation to restaurant and pastry showed greater resistance to oxidation in the Rancimat test. The transesterification reactions were carried out via basic catalysis in reflux system and PARR reactor (model 5500), the optimized conditions, molar ratio of 1:6 (oil: methanol), 1% NaOH, 60 minutes reaction time and temperature of 65oC and 70oC. Biodiesel yields were obtained on average 90% and 87% respectively. Samples of biodiesel OFR were characterized by infrared spectroscopy, with characteristic spectrum of methyl esters. The biodiesel the (OFR) had lower oxidative stability to values recommended (6 h) due to degradation processes arising in the process of frying. The results of TG / DTG in an inert atmosphere, it was possible to analyze these volatility and thermal stability of biodiesel. The parameters determined for biodiesel OFR presented in accordance with the resolution of the ANP, namely, acid value, iodine value, viscosity and density. It was found that in Manaus-AM there is no registration about the production of biodiesel in industrial scale, justified by the isolation of the region, which entails in high cost of inputs for the biodiesel industry. This study indicated that Manaus has a potential supply of 296,100 liters per month of residual oil in the home, and timely deployment of a plant of 10,659 L / day of biodiesel. The costs of production and investment were also analyzed. / O processo de fritura é um procedimento rápido e bastante apreciado pela população, em vista dos alimentos adquirirem características sensoriais agradáveis. São inúmeras as substâncias que alteram a qualidade do óleo e dos alimentos fritos obtidas por meio de reações hidrolíticas, oxidativas e termoxidativas. A ingestão destas substâncias é nociva à saúde e o descarte em local inapropriado, tais como, pias/ralos, igarapés e esgotos podem agravar problemas ambientais, pois além de promover a poluição dos rios, leva ao encarecimento do tratamento de água e de esgoto e a proliferação de insetos. Este trabalho foi conduzido para avaliar o nível de degradação dos óleos de fritura residual (OFR) e seu aproveitamento como matéria-prima para produção de biodiesel, proporcionando um conhecimento/domínio da tecnologia de transformação do óleo de fritura residual na nossa região, e, consequentemente, agregar valor econômico a este resíduo e minimizar os problemas ambientais causados pelo seu descarte. Diferentes amostras de óleo de fritura residual: de restaurante, de residência e de pastelaria foram coletadas e caracterizadas pelos métodos analíticos de acordo com a metodologia do Instituto Adolfo Lutz, os resultados de ácidos graxos livres foi abaixo de 1%, o índice de acidez em média de 1,25 mg KOH/g óleo, índice de peróxido abaixo de 10 meq de O2/Kg óleo, índice de saponificação variou de 110,13 a 228,6 mg KOH/g óleo e índice de iodo na faixa de 85,96 a 106,17g I2.100g-1. A composição em ácidos graxos desses óleos foi análoga ao do óleo de soja refinado, com predominância de ácido palmítico (C16:0), ácido oléico (C18:1) e ácido linoléico (C18:2). A viscosidade foi em média de 43,65 mm2.s-1 e a densidade média foi de 0,9210 g.cm-3. As amostras de pastelaria tiveram valores superiores nestes parâmetros, decorrente da polimerização do óleo. No teste Rancimat as amostras de fritura de residência em relação às de restaurante e de pastelaria apresentaram maior resistência à oxidação. As reações de transesterificação via catálise alcalina foram realizadas em sistema de refluxo e no reator PARR (modelo 5500), nas condições otimizadas, razão molar 1:6 (óleo: metanol), 1% de NaOH, tempo reacional de 60 minutos e temperatura de 65oC e 70oC. Obtiveram rendimentos em biodiesel em média de 90% e de 87%, respectivamente. As amostras de biodiesel de OFR foram caracterizadas por espectroscopia na região do infravermelho, com espectro característico de ésteres metílicos. O biodiesel de OFR apresentou valores de estabilidade oxidativa inferior ao valor recomendado (6 h), devido aos processos de degradação advindos do processo de fritura. Com os resultados da TG/DTG em atmosfera inerte, foi possível analisar a volatilidade desse biodiesel e a estabilidade térmica. Os parâmetros do biodiesel de OFR apresentaram-se de acordo com a resolução da ANP, a saber, índice de acidez, índice de iodo, viscosidade e densidade. Este estudo indicou que Manaus possui uma oferta potencial de 296.100 litros mensais de óleo residual nas residências, sendo oportuna a implantação de uma usina de 10.659 L/dia de biodiesel. Os custos, bem como investimento da produção também foram analisados.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The utilization of biodiesel has shown a promising potential in the whole world. Firstly, for it s enormous contribution to the environment, due the qualitative and quantitative reduction s levels of environmental pollution, and, secondly, as a strategic source of renewable energy to replace diesel and other oil derivatives. In this context the used frying oil takes place, as a raw material that can be processed into a high quality biodiesel, and that once was being wasted and dumped in the environment in a erroneous way. This dissertation presents a feasibility study of producing biodiesel obtained through the used frying oil in the city of Santa Maria, Rio Grande do Sul, Brazil. Some topics was analyzed for an effective scheme for the collection and production of biodiesel. The downtown of the city was chosen for the study, being the most populous and the neighborhood and for having more establishments using the fried oil in its processes, that way, making the results more reliable. Questionnaires were applied to the establishments and to the local population concerning the actions on the final destination of this waste, as well as environmental perceptions and knowledge about the theme, and also to determine the volume of used oil that would be ready for collection and processing into biodiesel. After that, was developed an economical viability of the project, from the perspective of the a public institution of education s perspective, the Federal University of Santa Maria, and this way, the project can reach benefits besides the environmental, social and financial ones, it can promotes an academic integration with the project, being a source of learning and development. Results demonstrated to be highly economical favourable to the implementation of the proposed scheme, however, to optimize the donation and collection system of the used oil, finally, were proposed some ideas and actions for the project s efficiency from the beginning of its chain. / A utilização do biodiesel tem apresentado um potencial promissor no mundo inteiro. Em primeiro lugar, pela sua enorme contribuição ao meio ambiente, com a redução qualitativa e quantitativa dos níveis de poluição ambiental, e, em segundo lugar, como fonte estratégica de energia renovável em substituição ao óleo diesel e outros derivados do petróleo. Neste contexto surge o óleo de fritura usado (OFU), como mais uma matéria-prima que pode ser transformada em biodiesel de alta qualidade, e que outrora estaria sendo desperdiçado e despejado no meio ambiente de forma incorreta. Esta dissertação apresenta um estudo de viabilidade de produção de biodiesel obtido através do óleo de fritura na cidade de Santa Maria, Rio Grande do Sul. Foram analisados alguns tópicos para que um efetivo esquema de coleta e produção do biodiesel fosse viabilizado. Selecionou-se o bairro Centro para este estudo, sendo este o mais populoso e o que mais apresenta estabelecimentos que utilizam o óleo de fritura em seus processos, tornando o resultado mais confiável. Questionários foram aplicados aos empresários e à população para que se verificassem as ações relativas à destinação deste resíduo, assim como a percepção ambiental acerca do tema proposto, e ainda para se determinar o volume de óleo que estaria pronto para coleta e transformação em biodiesel. A seguir, foi analisada a viabilidade econômica do projeto, sob a ótica da participação de uma instituição pública de ensino, a Universidade Federal de Santa Maria, sendo que desta forma, o projeto além de visar benefícios ambientais, sociais e financeiros, pode promover uma integração de acadêmicos com o projeto, servindo como fonte de aprendizado e desenvolvimento. Resultados econômicos demonstraram ser altamente favoráveis para a concretização do esquema proposto, no entanto, para que se otimize o sistema de doação e coleta do óleo usado, finalmente, foram propostas algumas idéias e ações para que o projeto seja eficiente desde o começo de sua cadeia.

Made available in DSpace on 2016-05-02T13:54:03Z (GMT). No. of bitstreams: 1 VeraLuciaAraujoLeite-Dissertacao.pdf: 357600 bytes, checksum: e05515ee67ae627974704720e986db8b (MD5) Previous issue date: 2010-05-18 / The present study aimed at testing the possibility of using residual oil in biodiesel production, thus reducing the amount of this oil that is released daily in the sewer system and causes much of water pollution. Five treatments were carried through in laboratory procedures. They consisted of biodiesel production with refined soybean oil by methyl and ethylic route; biodiesel production from waste oil by ethylic route with water addition at the end of the transesterification process; biodiesel production from washed residual oil, by alcoholic route, with or without water addition at the end of the transesterification process. The biodiesel production was also tested at the plant with refined soybean oil and residual oil. Laboratory results have shown that the biodiesel production using non-residual oil, by methyl route, has the same yield of the ethylic route. The use of washed residual oil with water addition at the end of the process allows the production of biodiesel with visual quality similar to that of non-residual oil obtained through laboratory procedures and with return 5% lower than non-residual oil. The yield of biodiesel at the plant was around 80% for residual or non-residual, indicating that biodiesel yield may be lower in large-scale production than in laboratory production processes, getting an average production of 300 liters of biodiesel for each 300 liters of vegetable oil. / O presente trabalho teve como objetivo testar a possibilidade do uso do óleo residual a produção de biodiesel, reduzindo assim a quantidade deste óleo que é lançada diariamente na rede de esgoto e causa grande parte da poluição dos recursos hídricos. Nos procedimentos laboratoriais foram realizados cinco tratamentos, os quais contaram da produção de biodiesel com uso de óleo refinado de soja pela rota etílica e metílica; produção de biodiesel a partir de óleo residual pela rota etílica com água adicionada no final do processo de transesterificação; obtenção de biodiesel com óleo residual lavado, pela rota etílica, com ou sem água adicionada no final do processo de transesterificação. Foi também testada a produção de biodiesel na usina com óleo refinado de soja e com óleo residual. Os resultados laboratoriais demonstraram que a produção de biodiesel, utilizando o óleo não residual, pela rota metílica, apresenta o mesmo rendimento da rota etílica. A utilização de óleo residual lavado e com adição de água ao final do processo permite produção de biodiesel com qualidade visual semelhante à do óleo não residual através dos procedimentos laboratoriais e com rendimento 5% inferior quando comparado com o óleo não residual. O rendimento de biodiesel na usina foi em torno de 80% para o residual ou não residual, demonstrando que em larga escala o rendimento de biodiesel pode ser inferior aos obtidos nos processos laboratoriais, sendo obtida uma produção média de 300 litros de biodiesel para cada 300 litros de óleo vegetal.

The commercial pressure frying has been limited to frying huge amount of products due to its dependence on the amount of moisture released from the food for generating the desired pressure. This study investigated the feasibility of using nitrogen gas as a substitute for steam in the pressure frying system. The effects of various process conditions (source of pressure, frying temperature and pressure) on fried product and frying oil qualities were evaluated. Frying experiments were performed on breaded/battered poultry products including chicken nuggets (homogenous) and chicken fillets (marinated, intact muscle). Efforts were also made to develop rapid methods to determine frying oil quality and discriminate among fresh, marginal and discarded oils using a chemosensory (also known as electronic nose) or Fourier transform infrared spectroscopy (FTIR-ATR). Frying temperature and pressure affected fried food quality. An increase in frying pressure resulted in tender, juicier products with less oil uptake due to high moisture retention. An increase in frying oil temperature resulted in an increased moisture loss, oil uptake resulting in less tender and juicier products. Compared with frying using steam released from food, using nitrogen provided similar or better quality fried products in terms of moisture retention, juiciness and texture. The reused oils from the fryer using nitrogen gas was better in quality than the system using steam as evidenced from the physical, chemical and chemosensory measurements. / Ph. D.

Made available in DSpace on 2017-07-10T15:14:22Z (GMT). No. of bitstreams: 1 DissertacaoWellingtonTondo.pdf: 2411575 bytes, checksum: a09d8d70644fa4223666d8c7ff42a3ac (MD5) Previous issue date: 2015-03-09 / The large consumption of fossil fuels that still today predominates the world's energy supply is one of the great villains in greenhouse gases emissions (GHG), that are largely responsible for global warming. The oil reserves tend to depletion, and the growing demand of energy needed to feed the technological advances, the search for solutions to minimize emissions of pollutants and waste recovery, discarded improperly by man, became an opportunity to add value and produce energy from raw materials, that cause major environmental impacts. The biodiesel from waste frying oil has been shown to be effective alternative in renewable energy production, as well as having large potential energy, generates by-products that may be incorporated in the processing of raw materials, adding final value. This work evaluated the use of blends of diesel oil with oil and biodiesel from waste frying, in fixed and varying proportions of 10% for each treatment, B0 being the absence of biodiesel and B100 being entirely, as an alternative renewable fuel in burners for heating of pools. The conduct of the experiment occurred in the thermal pool block physiotherapy State University of Western Paraná (UNIOESTE), during the month of August 2014, in the Cascavel campus, using entirely randomized design. The fuels were evaluated for their behavior at room temperature and passing through a heating process, which on average was 50,63 °C, before to combustion in the burner. We evaluated data: percentage of water and impurities, viscosity, density, calorific value, emission of CO2, O2, and the exhaust temperature in the produced blends. Were also collected input and output temperature information in the boiler, flow water, flow and fuel temperature, to determine the specific consumption and efficiency. There was a reduction in thermal efficiency of the system, as increased the percentage of biodiesel contained in mixtures, operating at room temperature. However, with the pre-heating, we obtained a significant improvement. KEYWORDS: / O grande consumo de combustíveis fósseis que ainda hoje predomina na oferta de energia mundial é um dos grandes vilões nas emissões de gases de efeito estufa (GEE), que são os grandes responsáveis pelo aquecimento global. As reservas de petróleo tendem ao esgotamento, e com a crescente demanda de energia necessária para suprir os avanços tecnológicos, a busca por soluções para minimizar as emissões de poluentes e o aproveitamento de resíduos, descartados de forma indevida pelo homem, tornou-se uma oportunidade de agregar valores e produzir energia a partir de matérias-primas, que causam grandes impactos ambientais. O biodiesel de óleo residual de fritura tem se mostrado como alternativa eficaz na produção de energia renovável, pois além de possuir alto potencial energético, gera subprodutos que podem ser incorporados no processamento da matéria-prima, agregando valor final. Este trabalho buscou avaliar a utilização de blendas de óleo diesel com óleo e biodiesel de resíduos de fritura, em proporções fixas e variadas em 10% para cada tratamento, sendo B0 a ausência de biodiesel e B100, sua totalidade, como alternativa de combustível renovável em queimadores para aquecimento de piscinas. A condução do experimento ocorreu na piscina térmica do bloco de fisioterapia da Universidade Estadual do Oeste do Paraná (UNIOESTE), durante o mês de agosto de 2014, no campus de Cascavel, utilizando delineamento experimental inteiramente casualizado. Os combustíveis foram avaliados quanto ao seu comportamento à temperatura ambiente e passando por um processo de aquecimento, que em média foi de 50,63 ºC, antes da combustão no queimador. Foram avaliados dados de: percentual de água e impurezas, viscosidade, densidade, poder calorífico, emissão de gases CO2, O2, e a temperatura de escape nas blendas produzidas. Também foram coletadas informações da temperatura de entrada e saída da caldeira, vazão de água, fluxo e temperatura do combustível, para determinação do consumo específico e eficiência. Verificou-se uma redução na eficiência térmica do sistema, à medida que aumentou o percentual de biodiesel contido nas misturas, operando na temperatura ambiente. Porém, com o pré-aquecimento, obteve-se uma melhora significativa. PALAVRAS-