Made available in DSpace on 2014-08-13T14:50:46Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-02-27Bitstream added on 2014-08-13T18:00:40Z : No. of bitstreams: 1 000756666.pdf: 613574 bytes, checksum: a92a80d34136f09d16ed171a5dede264 (MD5) / Os medicamentos antineoplásicos são uma das classes de produtos farmacêuticos com maior potencial para causar efeitos negativos no ambiente. Várias fontes contribuem para a potencial contaminação do ambiente com esses medicamentos, como emissões da indústria ou descarte direto de produtos farmacêuticos nos domicílios, mas a principal fonte de compostos citostáticos no esgoto ou no ambiente são excreções (urina e fezes) de pacientes em tratamento. Neste estudo foi analisada a presença do antineoplásico 5-fluorouracil (5-FU) e sua quantificação nos efluentes de um hospital oncológico de grande porte e na rede municipal de tratamento de esgoto. Foram analisadas 10 amostras obtidas de um ponto distinto (A), a partir dos efluentes do Hospital de Câncer de Barretos (HCB) e 5 amostras foram obtidas de dois pontos diferentes (B e C) do efluente da Estação de Tratamento de Esgoto (ETE) da cidade de Barretos (ETEB), que tem como destino final o Ribeirão Pitangueiras. Observou-se a presença do fármaco na concentração de 26,7 a 733 μg/L em todas as 10 amostras de água residuária do HCB analisadas, os resultados foram muito superiores aos encontrados em outros trabalhos semelhantes realizados em outros hospitais. Também foi realizado o cálculo das concentrações previstas do agente citostático na água residuária do HCB, utilizando-se parâmetros como o consumo de 5-FU, o consumo de água e a fração de droga excretada na forma não metabolizada. Encontrou-se uma baixa correlação entre a concentração prevista e a concentração medida analiticamente. Esse baixo índice de recuperação pode ter ocorrido decorrente da excreção do fármaco realizada fora do ambiente hospitalar, de uma possível degradação da droga decorrente da instabilidade da molécula ou a perda de uma porção da droga adsorvida na matéria em suspensão dos efluentes. O impacto do descarte de 5-FU no meio ambiente foi avaliado através ... / Anticancer drugs represent one of the classes of pharmaceuticals with the greatest potential to cause negative effects on the environment. Contamination of the environment with these drugs may occur from several sources, such as emissions from industry or direct disposal of pharmaceuticals in households, but the main source of cytostatic compounds in the environment occur through sewage emission or excreted fluids (feces and urine) of patients receiving treatment. In this study we analyzed the presence of the antineoplastic 5-fluorouracil (5-FU) and its quantification in the effluents originated from a large oncology hospital and in the local municipal wastewater system. We analyzed 10 samples obtained from a distinct collection site (A), from the effluents of the Barretos Cancer Hospital (HCB). Also, 5 samples were obtained from two different sites (B and C) in the effluent from the Sewage Treatment Plant in Barretos (ETEB), whose final destination is the stream known as Ribeirão Pitangueiras. Presence of 5FU was observed in concentrations ranging from 26.7 to 733 μg/L in all 10 samples of the wastewater originated at the HCB collected at site A. These results were far superior to those found in similar studies performed at other hospitals. The predicted concentrations of the cytostatic agent in the wastewater from HCB was calculated using parameters such as 5-FU consumption, water consumption and the fraction of drug excreted unmetabolized. We found a low correlation between the predicted concentrations and the measured concentrations. This low recovery rate may have occurred due to probable excretion of the drug occuring outside the hospital facilities, since the majority of the patients were ambulatory. Other possibilities are drug degradation due to instability of the molecule and loss of a portion of the drug adsorbed in suspended solid matter of the effluent. The possible impact of the emission of 5-FU to the ...

Submitted in fulfillment of the requirements of the degree of Masters of Engineering: Chemical Engineering, Durban University of Technology, Durban, South Africa, 2018. / The anaerobic process is increasingly becoming a subject for many as it reduces greenhouse gas emissions and recovers carbon dioxide energy as methane. Even though these benefits are attainable, proper control and design of the process variables has to be done in order to optimize the system productivity and improve stability. The aim of this research was to optimize methane and biogas yields on the anaerobic co-digestion of sewage sludge using bio-chemical substrates as co-substrates. The first objective was to find the bio-chemical substrate that will generate the highest biogas and methane yields. The anaerobic digestion of these substrates was operated using 6 L digesters at 37.5℃. The substrate which generated the highest biogas and methane yield in the first batch experiment was then used for the second batch test. The objective was to optimize the anaerobic conditions (substrate to inoculum ratio, co-substrate concentration and temperature) in-order to optimize the biogas and methane yields. The second batch test was achieved using the conventional One-Factor-At-A-Time (OFAT) and the Design of Experiment (DOE) methods. Final analysis showed that the bio-chemical substrates could be substrates of interest to biogas generators. Amongst the substrates tested in the first batch experiment glycerol (Oleo-Chemical Product waste) generated the highest methane and biogas yields of 0.71 and 0.93 L. (g volatile solids added)-1, respectively. It was believed that glycerol contains significant amount of other organic substances such as lipids that have higher energy content than the other bio-chemical substrates, thus generating larger biogas and methane yields. Moreover, digestion of sewage sludge alone produced biogas yields of 0.19 L /g VS and 0.33 L/g COD, and methane yields of 0.16 L/g VS and 0.28 L/g COD. Generally, co-digestion yields were higher than digestion yields of sewage alone. Using the OFAT method the results of the second batch test on glycerol demonstrated highest amounts of volatile solids (VS) reduction, chemical oxygen demand (COD) reduction, biogas yield and methane yield of 99.7%, 100%, 0.94 L (g VS added)-1 and 0.75 L (g VS added)-1 at a temperature, substrate to inoculum ratio and glycerol volume of 50℃, 1 (on VS basis) and 10 mL, respectively. Above 22 mL and substrate to inoculum ratio of 1, the process was inhibited. The DOE results suggested that the highest methane and biogas yields were 0.75 and 0.94 L (g VS added)-1, respectively. These results were similar to the OFAT results, thus the DOE software may be used to define the biogas and methane yields equations for glycerol. In conclusion, anaerobic co-digestion of bio-chemical substrates as co-substrates on sewage sludge was successfully applied to optimize methane and biogas yields. / M

Thesis (Master of Engineering in Chemical Engineering)--Cape Peninsula University of Technology, 2018. / The production of biodiesel is an energy and water intensive process. The wastewater that is produced during this process is high in concentrations of COD, BOD, FOG and various other contaminants. Since it contains low levels of nutrients, it is difficult to degrade using natural processes such as conventional activated sludge wastewater treatment. The discharge of untreated biodiesel wastewater also raises serious environmental concern. It interferes when remediated with biological processes and results in additional costs during the production of biodiesel when penalties and fines are applied. Conventional treatment processes are not capable of treating contaminants and pollutants in biodiesel to satisfactory concentrations and hence advanced treatment processes are necessary. In this research, a lab scale integrated treatment process was used to investigate the successful reduction of contaminants, in particular COD, BOD and FOG. The integrated treatment process used in this study consisted of three consecutive steps; acidification, electrochemical oxidation and adsorption using chitosan as an adsorbent. The electrochemical oxidation process with IrO2-Ta2O5/Ti anodes was applied to treat biodiesel wastewater. Different operating conditions were tested to establish favourable conditions. The current density applied as well as the concentration of NaCl as the supporting electrolyte greatly affected the process. A NaCl concentration of 0.08M was deemed sufficient, whereas a current density of 1 mA/cm² showed superior performance compared to lower or higher current densities. Adsorption of pollutants in biodiesel wastewater was investigated using Chitosan as the adsorbent. Various chitosan concentrations, initial pH of the wastewater and repetitive adsorption stages were investigated. It was discovered that all three operating conditions greatly affect the performance of the process. The three consecutive adsorption stages using a chitosan concentration of 4.5 g/L at a pH of 2 resulted in the highest pollutant removal. It was observed that the integrated treatment process could reduce COD, BOD and FOG levels by 94%, 86% and 95% respectively. This concludes that the treated effluent complies with local industrial effluent discharge standards, which could be disposed safely without further treatment.

Wastewater treatment facilities have been identified as potential source of surface water pollution worldwide. In this study, the physicochemical qualities and heavy metal (including Zinc, Cadmium, Iron, Lead and Copper) concentrations in the final effluents, as well as the reduction efficiencies of three municipal wastewater plants in the Eastern Cape, South Africa were evaluated from September 2015 to February 2016 using standard methods. Wastewater effluent and sludge samples were collected from the selected plants on monthly basis over a period of six months from September 2015 to February 2016. Standard analytical method (Atomic absorption spectroscopy [AAS]) was used to assess the concentration levels of heavy metals. The physicochemical parameters assessed include pH, Temperature, Total Dissolved Solid, Turbidity, Biochemical Oxygen Demand, Chemical Oxygen Demand, Alkalinity, Dissolved Oxygen, Free chlorine, Chloride, Sulphate, Phosphate, Ammonium and Electrical Conductivity. The results of the evaluation showed that temperature ranges from 19 to 36 °C, Electrical Conductivity from 60-1095 mS/m, Alkalinity from 2.6-20.9 mg/L, Nitrate from 0.24-26.5 mg/L, Nitrite from 0.01-90 mg/L, Phosphate from 0.02-5.12 mg/L, Ammonium from 0.06-112 mg/L, Sulphate from 3-72 mg/L, Chloride from 3.25-224 mg/L, Chemical Oxygen Demand from 17-394 mg/L and Turbidity from 1.96-715 NTU. Free chlorine concentrations and dissolved oxygen were within the recommended limits for most part of the sampling period and ranged between 0.17-0.48 mg/L and 0.19-21.9 mg/L respectively. The pH, Phosphate, Sulphate and Free chlorine were within acceptable limits while Electrical Conductivity, Temperature, Total Dissolved Solid, Turbidity, Chemical Oxygen Demand, Chloride, Ammonium, Nitrate and Nitrite were not within specified limits. The reduction efficiencies observed generally ranged between 43.9 and 100 percent at all sampling points while zinc and lead were not detected throughout the sampling period. Cadmium showed low reduction rate ranging from 0 to 11.7 percent, while the rate of Copper reduction ranged from 0 to25 percent in January and February 2016. Zinc, lead and cadmium were generally not detected in the sludge samples except in January and February which could be due to the prevailing atmospheric conditions during the sampling period. Cu and Fe were detected through the sampling months of the study. We conclude that these municipal sewage plants are sources of pollution to their receiving watersheds and threats to public and environmental health.

Made available in DSpace on 2016-01-13T13:27:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-09-12. Added 1 bitstream(s) on 2016-01-13T13:33:26Z : No. of bitstreams: 1 000855097.pdf: 1957590 bytes, checksum: a3fc1fc4b440aa9c308318be89885223 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo do trabalho foi avaliar o desempenho de um wetland construído no setor de ranicultura para o tratamento do efluente em duas fases da criação de rã-touro. Foram analisadas as variáveis limnológicas e a eficiência de remoção dos nutrientes, a retenção de nutrientes no sedimento e nas macrófitas utilizadas (Eichhornia crassipes, Typha domingensis e Cyperus giganteus), bem como o ganho de biomassa. O tratamento foi eficiente na remoção de nitrato, nitrito, turbidez, fósforo total, sólidos totais suspensos, demanda bioquímica de oxigênio, coliformes termotolerantes, sólidos totais dissolvidos e clorofila a. As maiores cargas de nutrientes foram encontradas na fase de maior quantidade de biomassa de rãs estocada, com menores remoções de fósforo. As macrófitas utilizadas apresentaram ganho de biomassa satisfatório, com concentrações de nutrientes superiores ao do sedimento. As três espécies estocaram mais nutrientes na fase de maior biomassa de animais, com maior carga de nutrientes. Eichhornia crassipes foi a espécie que mais armazenou nitrogênio e fósforo em ambas as fases e com maior ganho de biomassa na fase de maior biomassa de rãs. Das espécies emersas, T. domingensis foi a que apresentou maior ganho de biomassa em ambas as fases, estocando todos os nutrientes na fase de maior biomassa. Ocorreu tendência de diminuição da matéria orgânica do sedimento em ambas as fases da entrada para a saída do wetland em função da presença das macrófitas. Este mesmo padrão de redução foi observado em relação aos nutrientes do sedimento. Concluiu-se que o sistema de tratamento implantado foi eficiente na melhoria da qualidade do efluente, com redução de nutrientes e de coliformes termotolerantes. As macrófitas desempenharam papel importante na redução destes componentes e podem ser utilizadas para tratar efluentes da ranicultura / The aim of the work was to evaluate the performance of the constructed wetland in frog culture sector for the effluent treatment in two phases of bullfrog culture. Limnological variables and the removal efficiency of nutrients were analyzed, the nutrients retention in the sediment and macrophytes used (Typha domingensis, Cyperus giganteus e Eichhornia crassipes) as well as biomass gain of the same. The treatment was efficient in a nitrate, nitrite, turbidity, total phosphorus, total suspended solids, biochemical oxygen demand, thermotolerant coliforms total, total dissolved solids and chlorophyll a. The high nutrients loads found in the phase of the high biomass frog storage, with lower phosphorus removals. The macrophytes used presented biomass gain satisfactory, with nutrient concentrations above the sediment. The three species stocked more nutrients during the phase of the high biomass frog storage, which high nutrients load. Eichhornia crassipes was the specie that most stored nitrogen and phosphorus in both phases and greater biomass gain in the phase of the high biomass frog storage. From the emerged species, T. domingensis showed the higher biomass gain in both phases, stocking all nutrients in the phase of the high biomass frog storage. There was a tendency of reduction of the organic matter in the sediment in both phases of the inlet to the outlet of wetland due to the presence of macrophytes. This same pattern of reduction was observed relation to the sediment. It was concluded that the treatment system implanted was efficient in improving the quality of the effluent, reducing nutrient and fecal coliform. The macrophytes played an important role in the reduction of such components and may be used to treat effluents of the frog culture

Made available in DSpace on 2014-06-11T19:33:25Z (GMT). No. of bitstreams: 0 Previous issue date: 2013-09-02Bitstream added on 2014-06-13T19:23:18Z : No. of bitstreams: 1 000739180.pdf: 903847 bytes, checksum: ab7369716a3250c09766b15d4cf9c235 (MD5) / O processamento do esgoto urbano pelas estações de tratamento (ETE) produz uma mistura pastosa e complexa constituída por material orgânico (microorganismos, vegetais, etc.) e inorgânico (hidrocarbonetos aromáticos, minerais, metais pesados, etc.). Diante da possibilidade de utilização deste lodo para enriquecimento de solo agrícola (USEPA, 1999), o presente estudo teve como objetivo avaliar o potencial de desregulação endócrina do Lodo de uma Estação de Tratamento de Esgoto (LETE) do estado de São Paulo em modelos in vivo utilizando ratos machos adultos e recém-desmamados. No Estudo A, ratos Wistar machos com 98 dias de idade receberam por oito semanas ração basal (grupo GI) ou acrescida de 2.500, 5.000, 10.000 e 20.000ppm de LETE (grupos GII, GIII, GIV e GV respectivamente). Foram avaliados peso e aspectos histológicos do fígado, rins, adrenais, testículos, epidídimos, próstata ventral e vesículas seminais. Outros parâmetros analisados foram os níveis plasmáticos de hormônios sexuais e a qualidade e quantidade de espermatozoides. A exposição ao LETE reduziu a concentração plasmática do FSH e também o número de espermatozoides com movimento progressivo em ratos adultos. Esse resultado ocorreu de forma dose-resposta e significativamente nas concentrações de 10.000 e 20.000 ppm de LETE, podendo indicar comprometimento da qualidade do esperma. O Estudo B baseou-se no protocolo de Hershberger (OECD Nº 144, 2009) e visou avaliar efeitos androgénicos e anti-androgênicos em ratos Wistar machos desmamados no 21º dia pós-natal. Também nesses animais não foram registradas alterações do peso corpóreo e dos órgãos, do consumo de ração. Como conclusão no Estudo A os resultados sugerem alterações espermáticas funcionais que podem comprometer a fertilidade, e no Estudo B a exposição ao LETE não induziu efeito androgênico ou anti-androgênio em ratos adultos e... / Not available

Made available in DSpace on 2015-07-13T12:10:26Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-07-31. Added 1 bitstream(s) on 2015-07-13T12:25:13Z : No. of bitstreams: 1 000836878.pdf: 917663 bytes, checksum: 96f5931a68527394d3c7b9df84579a2b (MD5) / O objetivo do presente trabalho foi avaliar a remoção de sulfametoxazol, diclofenaco e 17β- estradiol em águas destilada e natural através da oxidação com cloro. Os resultados indicaram que as concentrações iniciais dos microcontaminantes, bem como os tempos iniciais, apresentaram diferenças significativas na remoção dos fármacos em ambas às águas de estudo. Para os ensaios em água destilada, valores de remoção elevados foram encontrados. As águas naturais foram submetidas ao tratamento por clarificação seguido da pós-cloração e os resultados revelaram que a melhor eficiência de remoção deu-se para o diclofenaco, seguido do 17β-estradiol e do sulfametoxazol. De acordo com o estabelecido pela Portaria 2914/11, na qual estipula valores de pH, temperatura e tempos de contato em função do residual de cloro, o tempo correspondente seria até 10 minutos para a pós-cloração, assim, os melhores valores de remoção foram na ordem de 61% para o DCF, 36% para o E2 e 33% para o SMX em água destilada e para água natural esses valores foram de 34% para o DCF, 24% para o E2 e 11% para o SMX. As doses de cloro foram comparadas e para água destilada apenas o DCF apresentou diferenças significativas na eficiência de remoção com o aumento da dose aplicada (3,0 mg.L -1 ), porém para o SMX e E2 não foram observadas diferenças significativas. Observou-se formação de subprodutos já descritos por outros pesquisadores com esses microcontaminantes em água natural, para o SMX e E2 em concentrações de 20 a 90 μg.L -1, não apresentando formação de subprodutos para o DCF, o qual apresentou um dos maiores valores de remoção encontrados neste trabalho. Para cinética de oxidação dos fármacos o tempo de equilíbrio em 30 minutos foi observado para a maioria dos microcontaminantes estudados e todos se adequaram ao modelo cinético de pseudo-segunda ordem, com valores de K 2 na ordem de 0,0133(DCF), 0,0168(SMX) e 0,0326... / This study aimed to evaluate removing of sulphamethoxazole, diclofenac and 17β-estradiol on distilled and natural waters by oxidation with chlorine. The results indicated that the initial concentrations of microcontaminants as the inicial time, had a significant differences in both waters of study. For the tests in distilled water, high values of removing were found. The natural water was treated by clarification followed by post-chlorination and the results revealed that the best removal efficiency occurred for diclofenac then 17β-estradiol and sulphamethoxazole. In accordance with the Decree 2914/11, which establishes values of pH, temperature and contact time basis on the residual chlorine, the corresponding time would be up to 10 minutes for post-chlorination, so the best values were on the order of 61% for the DCF, 36% to E2 and 33% for SMX in distilled water, in addition, for natural waters, these values were 34% for the DCF to 24% to E2 and 11% for SMX. The doses of chlorine were compared and in distilled water only the DCF had a significant differences in the removal efficiency with the increase of the applied dose (3.0 mg l -1 ), but in the SMX and E2 no significant differences were observed. It was observed the formation of the sub products of chlorination described by other researchers with these microcontaminants in natural water for SMX and E2 in concentrations from 20 to 90 μg.L-1. However was not found the formation of sub products to DCF, which presented a major removal values found in this study. For the oxidation kinetics of the studied drugs, the ideal contact time was observed in 30 minutes for most studies and all microcontaminants has better adjustment to the kinetic model of the pseudo-second order, with K2 values in the order of 0.0133 (DCF), 0.0168 (SMX) and 0.0326 (E2) in distilled water and 0.0092 (DCF), 0.0025 (SMX) and 0.0479 (E2) in natural water

Orientador: João Lauro Viana de Camargo / Banca: Gisela de Aragão Umbuzeiro / Banca: Renné Laufer Amorim / Banca: Patrícia Garcia / Banca: Sergio Britto Garcia / Resumo: O processamento do esgoto urbano pelas estações de tratamento (ETE) produz uma mistura pastosa e complexa constituída por material orgânico (microorganismos, vegetais, etc.) e inorgânico (hidrocarbonetos aromáticos, minerais, metais pesados, etc.). Diante da possibilidade de utilização deste lodo para enriquecimento de solo agrícola (USEPA, 1999), o presente estudo teve como objetivo avaliar o potencial de desregulação endócrina do Lodo de uma Estação de Tratamento de Esgoto (LETE) do estado de São Paulo em modelos in vivo utilizando ratos machos adultos e recém-desmamados. No Estudo A, ratos Wistar machos com 98 dias de idade receberam por oito semanas ração basal (grupo GI) ou acrescida de 2.500, 5.000, 10.000 e 20.000ppm de LETE (grupos GII, GIII, GIV e GV respectivamente). Foram avaliados peso e aspectos histológicos do fígado, rins, adrenais, testículos, epidídimos, próstata ventral e vesículas seminais. Outros parâmetros analisados foram os níveis plasmáticos de hormônios sexuais e a qualidade e quantidade de espermatozoides. A exposição ao LETE reduziu a concentração plasmática do FSH e também o número de espermatozoides com movimento progressivo em ratos adultos. Esse resultado ocorreu de forma dose-resposta e significativamente nas concentrações de 10.000 e 20.000 ppm de LETE, podendo indicar comprometimento da qualidade do esperma. O Estudo B baseou-se no protocolo de Hershberger (OECD Nº 144, 2009) e visou avaliar efeitos androgénicos e anti-androgênicos em ratos Wistar machos desmamados no 21º dia pós-natal. Também nesses animais não foram registradas alterações do peso corpóreo e dos órgãos, do consumo de ração. Como conclusão no Estudo A os resultados sugerem alterações espermáticas funcionais que podem comprometer a fertilidade, e no Estudo B a exposição ao LETE não induziu efeito androgênico ou anti-androgênio em ratos adultos e ... / Abstract: The complex mixture of organic and inorganic materials that constitutes sewage sludge (SS) has been proposed for use in agriculture and as raw material for the pottery industry. This study aimed to assess the potential for endocrine disruption of SS in vivo using adult and weanling male Wistar rats. In a first experiment, pubertal male rats (42th postnatal day, PND) were exposed ad libitum up to adulthood (56th PND) to a diet containing 0, 2,500, 5,000, 10,000 or 20,000 ppm of SS. The liver, kidneys, adrenals, testes, epididymis, ventral prostate and full seminal vesicle weights were evaluated, in addition to sexual hormones levels, sperm counts and sperm motility. In the second study, androgenic and antiandrogenic effects were evaluated in wealing male rats (21th PND), daily treated during 10 days with flutamide (anti-androgenic positive control, 3mg/kg/day, gavage), testosterone propionate (androgenic positive control, 1mg/kg/day, s.c.) and fed diets with SS at 10,000 or 20,000 ppm. In these later animals, no alterations were registered in body and organs weights, diet consumption and sperm countings. Exposure to the SS only induced a doseresponse decrease in the quality of adult rats sperm (first experiment), documented by decreased number of sperm with progressive movement (10,000 ppm, 20,000ppm). According to these results, SS exposure did not induce androgenic or antiandrogenic effect in both periods of the life of Wistar rats / Doutor

Submitted by Ana Guimarães Pereira (agpereir@ucs.br) on 2016-06-21T16:37:36Z No. of bitstreams: 1 Dissertacao Dionisio da Silva Biron.pdf: 4968193 bytes, checksum: b3110cb668f93c8ff3069f7d944b6668 (MD5) / Made available in DSpace on 2016-06-21T16:37:36Z (GMT). No. of bitstreams: 1 Dissertacao Dionisio da Silva Biron.pdf: 4968193 bytes, checksum: b3110cb668f93c8ff3069f7d944b6668 (MD5) Previous issue date: 2016-06-21 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, CAPES

Made available in DSpace on 2014-06-11T19:29:31Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-07-16Bitstream added on 2014-06-13T19:59:10Z : No. of bitstreams: 1 dreifus_t_me_bauru.pdf: 1757987 bytes, checksum: 3ca7db6f1e016a17e90f4944649089cc (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Universidade Estadual Paulista (UNESP) / Esta pesquisa visa o tratamento de águas residuárias através de Sistemas de Alagados Construídos (Westlands) de fluxo subsuperficial e escoamento horizontal. O principal objetivo deste sistema é a remoção da matéria orgânica, uma vez que, a matéria carbonácea presente no esgoto é degradada, tanto aerobicamente por microorganismos que estão aderidos nas raízes das mocrófitas quanto, anaerobicamente pelas bactérias aderidas no substrato do leito filtrante. A estação de tratamento de esgoto por Alagados Construídos está localizada na cidade de Bauru-SP e trata o esgoto produzido pela Moradia Estudantil e pelo Campus do Departamento de Educação Física da Universidade Estadual Paulista Júlio de Mesquita Filho (UNESP). Para uma melhor condição de estudo são utilizadoas três sistemas de leitos com 9m de comprimento por 4,5m de largura e 0,80m de profundidado e inclinação de 1%. Os leitos foram compostos por diferentes substratos: o primeiro, preenchido com brita nº 1, brita nº 3 e areia grossa, o segundo preenchido pedrisco, poliestireno expandido (isopor) moído e reciclado e areia grossa, e o terceiro com brita nº 3 e areia grossa. Com o uso desses diferentes substratos foi possível avaliar em duas etapas de análise, qual deles apresenta os melhores resultados e condições para o tratameto de águas residuárias. A eficiência média de remoção de DBO foi de 85,6% para o leito de brita, 84,2% para o leito de isopor e 85,4% para o leito de areia. A remoção de fosfato teve média de eficiência de 53,3% para o leito de brita, 9,6% para o leito de isopor e 89% para o leito de areia. Para o nitrogênio total Kjeldahl a eficiência média de remoção foi de 7,7% para o leito de brita, 77,0% para o leito de isopor e 75,3% para o leito de areia. No geral todo o sistema se mostrou eficiente para o tratamento de águas residuárias, porém o leito de isopor se destacar por se tratar de um material alternativo e reciclado / This research aims at the wastewater treatment systems using constructed wetlands of subsurface flow and horizontal flow. The main objective of this system is the removal of organic matter, since the carbonaceous matter present in the sewage is dedraded, both aerobically by microorganisms which are adhered on the roots of macrophytes, anaerobically by bacteria adhered to the substrate of the filter bed. The sewage treatment plant by Constructed Westlands is located in the city of Bauru, SP, and treats the sewage produced by the student's home and Deparment of Physical Education, Universidade Estadual Paulista Julio de Mesquita Filho (UNESP). For a better quality studies are used three-bed systems with 9m long by 4.5m wide and 0.80m depth and inclination of 1%. The beds were made up of different substrates: the first, filled with gravel nº 1, nº3 crushed stone and sand, the second filled with gravel, expanded polystyrene (Stryrofoam) and recycled crushed and coarse sand, gravel and the third paragraph 3 and coarse sand. Using these substrates could be assessed in two stages of analysis, which one gives the best results and conditions for the treatment of wastewater. The average efficiency of BOD removal was 85.6% for the bed of crushed rock, 84.2% for the foam bed and 85.4% for the sand bed. The removal efficiency phosphate averaged 53.3% for the gravek bed, the bed to 9.6% of polystyrene and 89% for the sand bed. For the Kjeldahl nitrogen removal efficiency was an average of 75.7% for the bed of gravel, 77.0% for the bed of Styrodom and 75.3% for the sand bed. In general the whole system is efficient for the treatment of wastewater, byr the bed of Styrofoam stand out because it is an alternative material and recycled