Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 26, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. Robert J. Kremer. Vita. Includes bibliographical references.

Thesis (doctoral)--Wageningen Universiteit, 2008. / Summary in Dutch: p. 245. "Propositions" ([1] leaf) inserted. Includes vita (p. 149-151). Includes bibliographical references.

Thesis (M.S.)--University of Texas at El Paso, 2009. / Title from title screen. Vita. CD-ROM. Includes bibliographical references. Also available online.

Thesis (M.Sc.)--College of William and Mary. / Includes bibliographical references.

Submitted by Erika Demachki (erikademachki@gmail.com) on 2016-01-14T12:59:48Z No. of bitstreams: 2 Dissertação - Douglas Pereira da Silva Pitaluga - 2014.pdf: 5824789 bytes, checksum: 85a87385cf42dae67ee7e83bc0803d6e (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Approved for entry into archive by Erika Demachki (erikademachki@gmail.com) on 2016-01-14T13:05:22Z (GMT) No. of bitstreams: 2 Dissertação - Douglas Pereira da Silva Pitaluga - 2014.pdf: 5824789 bytes, checksum: 85a87385cf42dae67ee7e83bc0803d6e (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) / Made available in DSpace on 2016-01-14T13:05:22Z (GMT). No. of bitstreams: 2 Dissertação - Douglas Pereira da Silva Pitaluga - 2014.pdf: 5824789 bytes, checksum: 85a87385cf42dae67ee7e83bc0803d6e (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) Previous issue date: 2011-06-28 / The present study had the goal of assessing the efficiency and behavior of three substrates in the treatment of sanitary sewage in a root zone system. Specifically the objectives were to assess the behavior of the washed sand, gravel # 0 and gravel # 1 substrates and relate their efficacies in a root zone system with sub-superficial horizontal flow preceded by a septic tank and an anaerobic filter in the treatment of a sewage coming from one university unit. The repetitions of raw sewage constituted of five simple samples and five composed samples. The repetitions of the effluent of each stage of the treatment constituted of nineteen simple samples. All the samples were performed fortnightly and submitted to laboratorial analysis. Were assessed parameters the BOD, DO, COD, thermotolerant coliforms, pH, total phosphorus, Kjeldahl total nitrogen, ammoniacal nitrogen, oil and grease, total solids, total fixed solids and suspended solids. The experimental system of sewage treatment was set up at the Civil Engineering College, located at Campus I of the Federal University of Goiás, in the east region of the city of Goiânia – Goiás, Brazil, which constituted of a septic tank and an anaerobic filter, followed by three independent units of root zones. Each unit of the root zones received the flow of 180 L d-1, which corresponds to the area of a treatment station of 3 m2 per inhabitant. The treatment in these units occurred simultaneously. After thirty days from the beginning of the sewage application in the root zones, the collection of the samples to the analysis of the effluent and affluent quality were started. Considering the plant evapotranspiration, the results were analyzed by the tool Statistical Analysis System – SAS, performing F tests and Tukey – Kramer test with a 5% probability. The percentage efficacies of the three substrates used were similar. There hasn’t been any significant difference between the efficacies of the treatments in the removal of the attributes: COD, Kjeldahl total nitrogen, ammoniacal nitrogen, oil and grease. The treatment with washed sand substrate was more efficient in the removal of BOD and total phosphorous. The gravel # 0 was more efficient in the removal of thermotolerant coliforms, total solids and fixed total solids, and gravel # 1 was more efficient in the removal of suspended solids. After 18 months the system started working, the channel filled with washed sand colmatated. / O presente estudo teve como objetivo avaliar a eficiência e o comportamento de três substratos no tratamento de esgoto sanitário, num sistema do tipo zona de raízes. De modo específico, objetivou-se avaliar o comportamento dos substratos areia lavada, brita # 0 e brita # 1 e relacionar suas eficiências num sistema do tipo zona de raízes de fluxo subsuperficial horizontal, precedido de tanque séptico e filtro anaeróbio, no tratamento do esgoto gerado numa unidade universitária. As repetições do esgoto bruto foram constituídas por cinco amostragens compostas e cinco amostragens simples. Já as repetições do efluente de cada etapa do tratamento foram constituídas por dezenove amostragens simples. Todas as amostragens foram realizadas quinzenalmente e submetidas a análises laboratoriais. Foram avaliados os parâmetros de DBO, OD, DQO, coliformes termotolerantes, pH, óleos e graxas, fósforo total, nitrogênio total Kjeldahl, nitrogênio amoniacal, sólidos totais, sólidos totais fixos e sólidos suspensos. O sistema experimental de tratamento de esgotos foi implantado na Escola de Engenharias, localizada no Campus I da Universidade Federal de Goiás (UFG), região Leste da cidade de Goiânia-GO e constituiu-se de um tanque séptico e um filtro anaeróbio, seguidos por três unidades de zona de raízes independentes. Cada unidade de zona de raízes recebeu uma vazão de 180 L d-1, correspondente a uma área de sistema zona de raízes de 3 m2 por habitante. O tratamento nestas unidades ocorreu de forma simultânea. Após trinta dias do início da aplicação de esgoto nas zonas de raízes, iniciaram-se as amostragens para a análise da qualidade do afluente e dos efluentes. Considerando a evapotranspiração das plantas, os resultados foram analisados pela ferramenta Statistical Analysis System – SAS, realizando os Testes F e de Tukey – Kramer, a 5% de probabilidade. As eficiências percentuais dos três substratos utilizados foram semelhantes. Não houve diferença significativa entre as eficiências dos tratamentos na remoção dos atributos: DQO, nitrogênio total Kjeldahl, nitrogênio amoniacal e óleos e graxas. O tratamento com substrato areia lavada foi mais eficiente na remoção de: DBO e fósforo total; o substrato brita # 0 foi mais eficiente na remoção de coliformes termotolerantes, sólidos totais e sólidos totais fixos, e a brita # 1 foi mais eficiente na redução dos sólidos suspensos. Após 18 meses do início de funcionamento do sistema o leito preenchido com areia lavada colmatou.

Horizontal subsurface flow (HSSF) constructed wetlands were evaluated for the treatment of flow-through trout farm effluent, phosphorus sorption affinity of gravel-bed media, and influence on Rhodamine WT (RWT) transport. HSSF wetlands coupled with mechanical pretreatment demonstrated significant (p <0.05) removal of total ammonia-nitrogen (TAN), total phosphorus (TP), total organic carbon (TOC), total suspended solids (TSS), five-day biochemical oxygen demand (BOD5), and turbidity. Treatment occurred predominantly within the wetland cells, with minimal removal of studied water quality parameters by means of sedimentation or microscreen filtration (80 ?m mesh). HSSF wetlands removed 69% of influent TSS, 24% of influent TP, and reduced turbidity by 66%. The removal of organic matter within the wetlands, as measured by BOD5, COD, and TOC was 62%, 50%, and 55%, respectively. After receiving effluent from a flow-through trout farm for about one year, the gravel media exhibited moderate removals of soluble phosphorus in batch and column sorption experiments. Partition coefficients (Kd) from batch sorption tests ranged from 45-90 mL/g. Low (60 mL/min) and high (165 mL/min) flow column experiments removed about 50 and 40% of influent PO4-P, respectively. The conservative nature of RWT in subsurface media has been called into question by many authors. Tracer response curves from tests conducted in pilot-scale HSSF wetlands exhibited elongated tails and dual peaks, in addition to mean tracer retention times far exceeding the theoretical value. Laboratory column testing of RWT and the more conservative NaCl tracer supported field data, indicating that RWT was more reactive within the wetland media. / Master of Science

Phosphorus (P) in stormwater runoff has detrimental effects on water quality and ecosystem health when it reaches surface waters and promotes algal blooms. Constructed wetlands (CWs) have been utilized to combat this problem by containing stormwater and removing excess nutrients. Including filter materials in the design of CWs has shown promise for increasing their capacity for nutrient removal. This mesocosm scale study was conducted outdoors over a 12-month period to evaluate the effectiveness of three filter materials in their ability to adsorb phosphorus, retain water, and support plant life. The filter materials examined were electric arc furnace (EAF) slag, engineered biochar, and sand. All treatments demonstrated positive plant response and the ability to retain water. The EAF slag and biochar removed significant amounts of P from effluent and appear to be suitable materials for integrating into CW design. Sand was found to be ineffective as a P filter.

No description available.

No description available.

Studies were conducted to determine the sediment oxygen demand (SOD) of a created urban wetland, the cause of differences between SOD methods, and the effect of temperature on the rate of exertion of SOD. <i>In situ</i>, laboratory tank, and laboratory core methods were employed to measure the SOD. It was observed that the main cause of differences in the results obtained by the three methods was differing water volume to sediment surface area (V/SA) ratios. SOD was found to increase with increasing V/SA ratios. By approximating the V/SA ratio of the marsh, the SOD for the system was estimated to be 3.08 g/m²/day. A 10°C rise in temperature was observed to more than double the SOD rate. / Master of Science