Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Anaerobic degradation"”.
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Anaerobic degradation of cyanuric acid, cysteine and atrazine by a facultative anaerobic bacterium
A facultative anaerobic bacterium that rapidly degrades cyanuric acid (CA) was isolated from sediment of a stream that received industrial waste water effluent. CA decomposition was measured throughout the growth cycle by using a High Performance Liquid Chromatography assay while also measuring the …
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Biochemistry and genetics of the pathway for the anaerobic degradation of aromatic compounds by Eubacterium oxidoreducens
The biochemical pathway for the anaerobic degradation of gallate, pyrogallol and phloroglucinol by Eubacterium oxidoreducens was investigated. Phloroglucinol reductase was purified 90-fold, from the soluble fraction of cell extract, to electrophoretic homogeneity. The enzyme was an α₂ homodimer …
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An analysis of field data for evidence of anaerobic degradation of PAH and BTEX plumes at manufactured gas plant sites
… Plain. These data were used to calculate biodegradation rate constants, which were then compared with laboratory microcosm data and published values. Isopleths were drawn from the field data to indicate the dominant biodegradation mechanisms at each of the sites, and stoichiometric …
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Biodegradation of Volatile Hydrocarbons in Estuarine Environments
… of microbial communities associated with VOC degradation in estuarine environments is not completely elucidated. Aerobic and anaerobic degradation of these VOCs in the Colne estuary, UK, was investigated using both cultivation-dependent and independent approaches, to understand the effect of …
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Cellulose mineralization in two-stage anaerobic digestion systems
… objective of this research was to evaluate the anaerobic degradation of a simulated high-strength solid waste/sludge, particulate cellulose, by two-stage anaerobic digestion systems. Cellulose hydrolysis and methanogesis were examined in both the thermo-meso and acid-methane two-stage systems …
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IMPROVING THE CIRCULARITY OF BIODEGRADABLE BIOPLASTICS BY PRODUCING BIOGAS: A FULL-SCALE ASSESSMENT
… alternative to conventional plastics. Their anaerobic co-digestion with the organic fractions of municipal solid waste (OFMSW) is a promising end-of-life scenario, as it reduces pre-treatment and increases process efficiency and biogas production. However, PLA shows poor biodegradability …
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Structural studies of radical enzymes in bacterial central metabolism
Anaerobic bacteria play a crucial role in cycling of nutrients in diverse ecosystems, degradation of organic compounds, and as key members of the human gut microbiome. The absence of oxygen limits the chemistry that bacteria can perform; however, these organisms do make use of organic radical …
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Approaches for the Implementation of Sustainability along the Pharmaceutical Life Cycle
… properties but showed mixed biodegradability: anaerobic degradation improved, aerobic degradation decreased. Two approaches addressed more efficient resource use: (1) multiplexed kinase activity screening, reducing extensive single-kinase testing; and (2) evaluating human platelet lysate as a …
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Development of a Genetic Modification System in <i>Clostridium scatologenes</i> ATCC 25775 for Generation of Mutants
… for the study of 3-MI production. 3-MI is an anaerobic degradation product of L-tryptophan and can cause pulmonary disorders and death in cattle and goats. To elucidate the 3-MI biosynthesis pathway and the underlying genes, it is necessary to develop a system to allow genetic modification in …
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Combined anaerobic-aerobic treatment of a simulated textile effluent
… a simulated textile effluent (STE) with combined anaerobic aerobic treatment. A simple simulated cotton processing effluent was generated that was similar to real effluents in terms of COD, BOD, COD:BOD, pH and TSS. An upflow anaerobic sludge blanket reactor (UASB) was more effective in treatment …
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Degradation of Chlorophenols in Swine Waste
… Identifying situations (and organisms) in which degradation of pollutants occurs is important field of research. Experimental work was focused on measuring the degradation of seven chlorinated phenols in swine waste using solid-phase micro-extraction (SPME) and gas chromatography(GC). Microbes in …
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Effects of Capping on Biodegradation of Organic Contaminants in Sediments
… investigated the effect of capping on biodegradation of organic contaminants in Anacostia River sediments using both experimental and modeling techniques. 14C–Phenanthrene mineralization was monitored under various redox conditions in Anacostia River sediments. Mineralization of …
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Application of the peat archive as tool in environmental chemistry
… the air from the roads into the bogs. Aerobic or anaerobic degradation of PCBs and PAHs did not occur over a 3-year period in incubation experiments. The heterogeneity of concentrations within a bog was determined in surface samples and by sampling three peat cores per bog. Concentrations varied …
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Bioavailability of metolachlor and glyphosate in aerobic and anaerobic soils
… throughout the globe. Despite the prevalence of anaerobic wet situations in the soil, the predictive capability for the environmental fate and bioavailability of these herbicides is based primarily on well-drained soil conditions. Anoxic events and flooding ubiquitous to agroecosystems may pose a …
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COMBINING GEOCHEMICAL AND NUMERICAL MODELING FOR CHLORINATED SOLVENTS GROUNDWATER CONTAMINATION
… redox conditions needed to obtain efficient degradation of each chloroethene. The more chlorinated ones such as tetrachloroethene (PCE) and trichloroethene (TCE) are better degraded via reductive dechlorination (RD) under anaerobic conditions, while the less chlorinated compounds such as …
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Anaerobic Dissipation of Herbicides in Microbiologically Induced Soil Redox Regimes
… flooding, poor drainage, or offsite transport. Anaerobic dissipation of herbicides in the environment is poorly understood. The objective of this research was to characterize the anaerobic fates of herbicides atrazine, trifluralin, and dimethenamid in anaerobic flooded soil or sediment. …
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Stoichiometry and kinetic modeling of an anaerobic baffled reactor, The
… dewatering, and exportation. Mainstream anaerobic treatment exhibits promising potential of becoming the sustainable wastewater treatment process of the future because of its energy generation potential from organics that are otherwise converted to solids under the current paradigm, lower …