Biodegradation Constant
Mostrando 1-12 de 29 artigos, teses e dissertações.
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1. Anaerobic biodegradation of benzo(a)pyrene by a novel Cellulosimicrobium cellulans CWS2 isolated from polycyclic aromatic hydrocarbon-contaminated soil
Abstract Cellulosimicrobium cellulans CWS2, a novel strain capable of utilizing benzo(a)pyrene (BaP) as the sole carbon and energy source under nitrate-reducing conditions, was isolated from PAH-contaminated soil. Temperature and pH significantly affected BaP biodegradation, and the strain exhibited enhanced biodegradation ability at temperatures above 30 °
Braz. J. Microbiol.. Publicado em: 2018-06
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2. BIODEGRADATION OF PHENOL BY FREE AND IMMOBILIZED CELLS OF A NOVEL Pseudomonas sp. NBM11
Abstract In the present study, a pure culture of bacterium (Pseudomonas sp. Strain NBM11) was isolated from the soil sample from a site contaminated with medical wastes and wastewater. The isolated strain can degrade up to 1000 mg/L of phenol completely. It was observed that temperature, pH and initial concentration of phenol play key roles in determining th
Braz. J. Chem. Eng.. Publicado em: 2017-01
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3. BIODEGRADATION OF EFFLUENT CONTAMINATED WITH DIESEL OIL AND GASOLINE USING CHITOSAN AS A NATURAL COAGULANT IN A CONTINUOUS PROCESS
Abstract This study evaluated the effects of aeration (constant aeration, intermittent aeration and a lack of aeration) and hydraulic retention time (HRT) (2, 3 and 4 days) on a continuous process with cell recycling, using chitosan as a natural coagulant for the sedimentation of a C1 mixed culture. This culture was used for the biodegradation of hydrocarbon
Braz. J. Chem. Eng.. Publicado em: 2016-12
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4. Estudo da geração de metano em uma célula de aterro sanitário / Study of the generation of methane in a landfill cell
O presente trabalho objetivou estudar a geração de biogás em uma célula experimental construída no Aterro Sanitário Caieiras (CTR-Caieiras) com o objetivo de obter os parâmetros cinéticos da geração de metano. A célula experimental foi construída com as dimensões de 30 x 35 x 5 m de altura e no centro foi instalado um dreno para captar o biogás
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/09/2011
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5. Biodegradation of naphthalene and anthracene by chemo-tactically active rhizobacteria of populus deltoides
Several naphthalene and anthracene degrading bacteria were isolated from rhizosphere of Populus deltoides, which were growing in non-contaminated soil. Among these, four isolates, i.e. Kurthia sp., Micrococcus varians, Deinococcus radiodurans and Bacillus circulans utilized chrysene, benzene, toluene and xylene, in addition to anthracene and naphthalene. Kur
Brazilian Journal of Microbiology. Publicado em: 2010-12
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6. Estudo da biodegradação do acido 2,4-diclorofenoxiacetico em formulações de liberação controlada
Technical grade 2,4-D (2,4-dichlorophenoxyacetic acid, i.e., free 2,4-D), and the herbicide retained in lignin-based controlled release formulations (2,4-D/CRF), were submitted to biodegradation. For this purpose, Pseudomona putida bacteria, Phanerochaete chrysosporium fungus and soil microflora were utilized. Different degradation rates were observed in acc
Publicado em: 1999
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7. Anaerobic Benzene Biodegradation Linked to Nitrate Reduction
Benzene oxidation to carbon dioxide linked to nitrate reduction was observed in enrichment cultures developed from soil and groundwater microcosms. Benzene biodegradation occurred concurrently with nitrate reduction at a constant ratio of 10 mol of nitrate consumed per mol of benzene degraded. Benzene biodegradation linked to nitrate reduction was associated
American Society for Microbiology.
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8. Spatial Distribution of Bacterial Communities and Phenanthrene Degradation in the Rhizosphere of Lolium perenne L.
Rhizodegradation of organic pollutants, such as polycyclic aromatic hydrocarbons, is based on the effect of root-produced compounds, known as exudates. These exudates constitute an important and constant carbon source that selects microbial populations in the plant rhizosphere, modifying global as well as specific microbial activities. We conducted an experi
American Society for Microbiology.
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9. Effects of dissolved oxygen concentration on biodegradation of 2,4-dichlorophenoxyacetic acid.
Batch experiments were conducted to examine the effects of dissolved oxygen concentration on the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D) by an enrichment culture of 2,4-D-utilizing bacteria. A modified Monod equation was found to describe the relationship between the specific growth rate and the concentrations of both the organic substrate and
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10. Persistence and Biodegradation of Spilled Residual Fuel on an Estuarine Beach1
The enrichment of hydrocarbon-degrading bacteria and the persistence of petroleum hydrocarbons on an estuarine beach after a spill of residual fuel oil on 11 April 1973 in Upper Narragansett Bay, R. I. was investigated. A rapid enrichment occurred during days 4 to 16 after the oil spill and a significant population of hydrocarbon-degrading bacteria was maint
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11. Biodegradation of organic wastes containing surfactants in a biomass recycle reactor.
The microbial biodegradation of simulated graywater, containing 21.5 mg of linear alkylbenzene sulfonate liter-1, was investigated with a continuous-flow bioreactor with 100% biomass recycle. Low concentrations of organic matter in the ultrafiltration eluate were achieved by hydraulic residence times as short as 1.6 h and for periods of up to 74 days at a hy
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12. Biotransformations of Aroclor 1242 in Hudson River test tube microcosms.
A microcosm system to physically model the fate of Aroclor 1242 in Hudson River sediment was developed. In the dark at 22 to 25 degrees C with no amendments (nutrients, organisms, or mixing) and with overlying water being the only source of oxygen, the microcosms developed visibly distinct aerobic and anaerobic compartments in 2 to 4 weeks. Extensive polychl