Two Stage Anaerobic Reactor
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. UASB reactor startup for the treatment of municipal wastewater followed by advanced oxidation process
The present study was done to shorten the start-up time of up-flow anaerobic sludge blanket (UASB) reactor. Two different nutrients were used during the UASB start-up period, which was designed to decrease the hydraulic retention time (HRT) from 48 to 24 and 12 to 6 hrs at average temperatures of 25-34 ºC. In the first stage, start-up was with glucose for 1
Braz. J. Chem. Eng.. Publicado em: 2014-09
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2. 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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3. Evaluation of throwing sludge generated on a treatment water station with an upflow anaerobic sludge blank reactor (UASB). / Avaliação da disposição de lodo gerado numa estação de tratamento de água em reator anaeróbio de fluxo ascendente e manto de lodo UASB.
Water treatment stations have the purpose of providing potable water. In this process of water treatment, a variety of residuals are produced; these, historically have been discharged into water streams, increasing the water pollution. The objective of this work was to evaluate the impact of discharging residuals in a treatment station with an Upflow Anaerob
Publicado em: 2007
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4. UV radiation application for sewer disinfection of the UASB reactor association with aerated submerged biofilter (ASB) / Aplicação de radiação UV para desinfecção de efluente da associação de reator UASB e biofiltro aerado submerso
This research has investigated and interpreted relevant aspects of disinfection by ultraviolet radiation (UVR) in the inativation of indicator microorganismsinactivation. The sanitary effluent was provided by anaerobic treatment (UASB reactor), followed by aerated submerged biofilter (ASB), on a real scale. This research was divided into two stages, whereas
Publicado em: 2007
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5. Efeito de antibióticos utilizados em suinocultura sobre a digestão anaeróbia de efluentes / Effect of antibiotics utilized in swine culture on the anaerobic digestion of effluents
The anaerobic systems for wastewater treatment are viable for several reasons, such as low cost and energy use of the biogas generated. However, the anaerobic digestion process is not yet completely understood, mainly due to the lack of knowledge about the toxicity of the anaerobic microbiota present in the sludge with respect to several compounds. In the ca
Publicado em: 2007
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6. Variação da taxa de recirculação de lixiviado determinada pela concentração de ácidos voláteis no tratamento da fração orgânica de resíduos sólidos urbanos domésticos / Influence of volatile acids in the variation of leachate recirculation rate in the treatment of the organic fraction of domestical municipal solid waste
The purpose of this dissertation was to evaluate the possibility of accelerating the process of anaerobic digestion of the organic fraction of domestic municipal solid waste, in two-stage systems, with increasing leachate recirculation rate, through the use of volatile acids as determining parameter of the moment in which the rate must be varied. To do so, t
Publicado em: 2006
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7. Influência da recirculação de percolado em sistemas de batelada de uma fase e híbrido na digestão da fração orgânica de resíduos sólidos urbanos / Influency of leachate recirculation in batch and one-phase reactors to anaerobic digestion of organic fraction of urban solid waste
This thesis studied the influence of the leachate recirculation, adjusting to the best rates and frequencies, for degradation of the organic fraction of the urban solid wastes, in one and two-phases (hybrid) system. Bioreactors of 3.45 L were used and filled out with OFMSW pattern, leachate as seed and an anaerobic filter as methanogenic reactor. The perform
Publicado em: 2004
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8. Performance and microbial characterization of the two stage process with upflow anaerobic sludge blanket reactors (UASB) treating swine wastewater / Desempenho e caracterização microbiana do processo de dois estágios com reatores anaeróbios de fluxo ascendente com manta de lodo (UASB) tratando águas residuárias de suinocultura
Two bench scale UASB reactors (volumes of 39,0 and 10,5 L) were operated in sequence, fed with swine wastewater with total suspended solids (TSS) concentration around 5000 mg/L in the first reactor, with controlled temperature (from 25 to 30 Celsius degrees) and operating with hydraulic detention time (HDT) in the first reactor varying from 62 to 16 h and in
Publicado em: 2004
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9. Complete degradation of polychlorinated hydrocarbons by a two-stage biofilm reactor.
A two-stage anaerobic-aerobic biofilm reactor successfully degraded a mixture of chlorinated organic compounds to water-soluble metabolic intermediates and carbon dioxide. Reductive dechlorination of hexachlorobenzene (HCB), tetrachloroethylene (PCE), and chloroform (CF) occurred on all tested primary carbon sources such as glucose, methanol, and acetate. Ho
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10. High-Rate Anaerobic Treatment of Wastewater at Low Temperatures
Anaerobic treatment of a volatile fatty acid (VFA) mixture was investigated under psychrophilic (3 to 8°C) conditions in two laboratory-scale expanded granular sludge bed reactor stages in series. The reactor system was seeded with mesophilic methanogenic granular sludge and fed with a mixture of VFAs. Good removal of fatty acids was achieved in the two-sta
American Society for Microbiology.
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11. The Role of Benzoate in Anaerobic Degradation of Terephthalate
The effects of acetate, benzoate, and periods without substrate on the anaerobic degradation of terephthalate (1,4-benzene-dicarboxylate) by a syntrophic methanogenic culture were studied. The culture had been enriched on terephthalate and was capable of benzoate degradation without a lag phase. When incubated with a mixture of benzoate and terephthalate, su
American Society for Microbiology.
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12. Phylogenetic Analysis of Bacterial Communities in Mesophilic and Thermophilic Bioreactors Treating Pharmaceutical Wastewater
The phylogenetic diversity of the bacterial communities supported by a seven-stage, full-scale biological wastewater treatment plant was studied. These reactors were operated at both mesophilic (28 to 32°C) and thermophilic (50 to 58°C) temperatures. Community fingerprint analysis by denaturing gradient gel electrophoresis (DGGE) of the PCR-amplified V3 re
American Society for Microbiology.