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The role of plants in the removal of nutrients at a constructed wetland treating agricultural (dairy) wastewater /Gottschall, Natalie, January 1900 (has links)
Thesis (M.Sc.) - Carleton University, 2005. / Includes bibliographical references (p. 66-71). Also available in electronic format on the Internet.
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Optimization of nutrient removal along with minimization of methyl mercury production in the pilot-scale constructed wetlandChavan, Prithviraj V. January 2008 (has links)
Thesis (Ph. D.)--University of Nevada, Reno, 2008. / "May 2008." Includes bibliographical references. Online version available on the World Wide Web.
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La selection d'un milieu filtrant utilisé dans un marais artificiel pour la déphosphatation des eaux usées municipales /Liu, Ling, January 1996 (has links)
Mémoire (M.Ress.Renouv.)--Université du Québec à Chicoutimi, 1996. / Document électronique également accessible en format PDF. CaQCU
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Habitat selection and food-web relations of Horned Grebes (Podiceps auritus) and other aquatic birds on constructed wetlands in the Peace Parkland, Alberta, CanadaKuczynski, Eva Christine. January 2009 (has links)
Thesis (M. Sc.)--University of Alberta, 2009. / Title from pdf file main screen (viewed on July 10, 2009). "A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science in Ecology, Department of Biological Sciences, University of Alberta." Includes bibliographical references.
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Impacts of municipal wastewater effluent on seed banks, chemistry, and microorganisms of soils excavated from wetland impoundments designated for wildlifeFinocchiaro, Raymond G. Kremer, R. J. January 1900 (has links)
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.
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A pilot constructed treatment wetland for pulp and paper mill wastewater performance, processes and implications for the Nzoia River, Kenya /Abira, M. A. January 1900 (has links)
Thesis (doctoral)--Wageningen Universiteit, 2008. / Summary in Dutch: p. 245. "Propositions" ([1] leaf) inserted. Includes vita (p. 149-151). Includes bibliographical references.
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Nutrient dynamics in a created desert wetland implications for the Rio Bosque Wetlands Park /Rodriguez, Ruth. January 2009 (has links)
Thesis (M.S.)--University of Texas at El Paso, 2009. / Title from title screen. Vita. CD-ROM. Includes bibliographical references. Also available online.
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Wetland vegetation dynamics and ecosystem gas exchange in response to organic matter loading rates /Bailey, David E. January 2006 (has links) (PDF)
Thesis (M.Sc.)--College of William and Mary. / Includes bibliographical references.
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Research note: A rock mulch layer supported little vegetation in an arid reclamation settingFehmi, Jeffrey S. 07 November 2017 (has links)
Adding a surface rock layer (also called rock armor or rock mulch) to constructed slopes improves erosion resistance but has had mixed effects on revegetation. This study investigated the effects of rock layer depth (no rocks, 10-, 15-, and 20-cm rock layers) and rock size (5-20cm diameter rocks) on vegetation cover. Seeding was applied four times in the first 2 years. After 3 years, plots with a rock layer averaged 7% vegetative cover compared to 85% on plots without a rock layer. There was a nonsignificant trend toward less vegetation with a deeper rock layer.
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Avaliação de diferentes substratos no tratamento de esgoto sanitário por zona de raízes / Evaluation of different substrates in the treatment of sanitary sewage by root zonePitaluga, Douglas Pereira da Silva 28 June 2011 (has links)
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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.
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