Ammonia Removal
Mostrando 25-36 de 113 artigos, teses e dissertações.
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25. Tratamento de efluente tÃxtil utilizando o processo foto-fenton / Treatment of textile effluent using photo-fenton process
The aim of this work was to study the performance of the photo-Fenton process using both the artificial UV and solar sources on the textile effluent treatments. Preliminary photo-Fenton experiments for mineralization and degradation of organic and inorganic pollutants as well as of synthetic dyes were carried out in order to assess the best experimental cond
Publicado em: 2011
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26. Post-treatment of photosynthetic facultative pond effluent on trickling filters in order to remove ammonia. / Pós-tratamento de efluente de lagoa facultativa fotossintética em filtros biológicos percoladores visando remoção de nitrogênio amoniacal.
Neste trabalho, estudou-se a utilização de filtros percoladores como tratamento complementar de efluente de lagoa de estabilização visando a remoção de nitrogênio, principal causador de problemas como a eutrofização de corpos hídricos em conjunto com o fósforo. A motivação principal para o desenvolvimento desta pesquisa foi a dificuldade encontr
Publicado em: 2011
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27. Remoção de amônia gerada em granjas avícolas e sua utilização em células à combustível e uso como fertilizante / Removal of ammonia generated from farm poultry and their use in the fuel cells and as fertilizer
A amônia presente em galpões fechados de criação de frangos afeta a saúde tanto dos animais como dos tratadores, além de ser um grave problema ambiental. O processo aqui recomendado faz uso de um material com grande capacidade de retenção tanto da amônia gasosa como na forma de seu hidróxido, NH4OH. Este absorvedor, um trocador catiônico sólido,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 07/07/2010
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28. Recuperação da amônia liberada no processo de "air stripping" aplicado ao tratamento do lixiviado de aterros sanitários / Recovery of ammonia released from air stripping process applied to sanitary landfill leachate treatment
Sanitary landfill leachate is a pollutant liquid effluent mainly due to its high ammonia concentration. Its treatment is necessary due to environmental and labour legislation requirements, besides prevention of environmental impacts of leachate release in water bodies. This research proposes ammonia removal from leachate by air stripping process, which trans
Publicado em: 2010
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29. Remoção de nitrogênio amoniacal de lixiviado de aterro de resíduos sólidos por precipitação química com formação de estruvita / Ammonium-nitrogen removal from leachate of solid waste landfill by chemical precipitation with struvite formation
Municipal solid waste landfilling is the best final disposal method due to its low operating cost and minimizing environmental impacts. As a result of degradation of the solid waste, leachate is generated and it is characterized by high concentrations of organic matter, ammonia nitrogen and inorganic salts which has high pollution potential. In this context,
Publicado em: 2010
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30. Avaliação do tratamento de lixiviado de aterro sanitário através de processo oxidativo avançado conjugado com sistema de separação por membranas
The landfill leachate is characterized by high recalcitrant organic matter concentration, ammonia and toxic compounds. This effluent can be an environmental problem due to its high pollutant potential when it is released without treatment. Studies reported in the literature showed that biological processes are not sufficient in meeting the discharge standard
Publicado em: 2010
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31. RemoÃÃo biolÃgica de nitrogÃnio de efluente avÃcola usando reator em batelada sequÃncial
Slaughterhouses and bird cold storage processing plants stand out as large polluters, particularly because of the large amounts of waste rich in organic substances, solids, oils and greases, nutrients, specially nitrogen and phosphorus. Nitrogen compounds removal from wastewater is usually accomplished through biological processes, by nitrification under aer
Publicado em: 2009
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32. Tratamento físico-químico de lixiviado de aterro sanitário pré-tratado por processo biológico aeróbio. / Physico-chemical treatment of landfill leachate from pre-treated by aerobic biological process.
Landfill leachates present high ammonia and organic matter concentrations, besides other pollutants, which do not allow its discharge to the environment without a previous treatment. Older landfill leachates, with more stabilized organic matter, present great pollutant potential, mainly due to the presence of recalcitrant substances that not often are remove
Publicado em: 2009
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33. Lixiviado de aterros sanitários brasileiros: estudo de remoção do nitrogênio amoniacal por processo de arraste com ar ("stripping") / Sanitary landfill leachate in Brazil: evaluation of ammonia nitrogen removal by air stripping process
Sanitary landfills are considered as the most appropriate way for final disposal of municipal solid wastes in Brazil, in the technical and economical point of view. Open dumps have been progressively substituted by well engineered and operated landfills. However, landfills still present environmental risks due to the gas emission and leachate production. Gas
Publicado em: 2009
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34. AplicaÃÃo de reatores hÃbridos aerÃbicos para o pÃs tratamento de reatores anaerÃbicos enfocando a nitrificaÃÃo do sistema
This study evaluated the application of hybrid reactor in simultaneous removal of carbon and nitrogen. It used two sets of reactors formed by anaerobic reactor (UASB + Filter anaerobic) and aerobic reactor (activated sludge + aerated biofilter). The hydraulic retention time (HRT) of the anaerobic reactors was at 8 hours as an aerobic reactor operated with HR
Publicado em: 2009
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35. Tratamento de esgoto sanitário em um reator de leito expandido em escala plena, operado com regiões anaeróbia e aeróbia sobrepostas / Treatment of sanitary wastewater in a full scale expanded bed reactor, operated with overlap anaerobic and aerobic regions
This present research had as main objective the evaluation of the performance of a full scale expanded bed reactor (159.0 M POT.3), operated under anaerobic and overlapping anaerobic-aerobic, treating sanitary wastewater. As specific objectives, it was evaluated using commercial sand to complement the bed of particles and distribution of material support alo
Publicado em: 2009
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36. Avaliação da co-disposição do lodo de tanques sépticos e fração orgânica de resíduos sólidos domiciliares em reatores anaeróbios / Evaluation of co-disposal of sludge from septic tanks and organic fraction of domestic solid waste in anaerobic reactors
Despite being an emerging country, unfortunately the sanitary situation of Brazil is quite precarious. Only 52.2% of the 5,507 brazilian municipalities have some type of sanitary service (IBGE, 2000). In this alarming scenario, individual solutions are gaining more importance. The adoption of septic tanks as an alternative to the solution of the sewage becom
Publicado em: 2009