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 “"Organic matter degradation"”.
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Fate and Effect of Peracetic Acid Solutions on Biological Wastewater Treatment Systems
… PAA on biological treatment processes, such as organic matter degradation, nitrification, and denitrification. On-site monitoring did not detect PAA in dissolved air flotation (DAF) influent and effluent samples collected at mid plant operation shifts; however, up to 25 mg/L PAA was detected in …
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Community, structure, activity and ecophysiology of sulfate-reducing bacteria in deep tidal flat sediments
… study are able to utilize a broad spectrum of organic substrates as electron and carbon sources. They can also grow by fermentation and therefore probably gain sufficient energy to survive under these uncomfortable conditions. The high abundance of SRB, seasonal changes in pore water sulfate, …
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Shaping Function Through Space: The Role of Spatial Organization in Microbial Communities
… by marine bacteria, a model for particulate organic matter degradation. Using high-throughput phenotyping of natural isolates, we show that vitamin cross-feeding is essential for successful colonization of chitin-particles by many auxotrophic strains. We then model two distinct vitamin …
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Organic Enrichment of Scottish Salmon Fish Farm Sediments: A Quantitative Analysis of Sulphur Biogeochemistry
… When the oxygen demand caused by input of organic matter exceeds the oxygen diffusion rate from overlying waters, sediments become anoxic and anaerobic processes dominate. In marine systems, sulphate reduction is the most important anaerobic process for the degradation of organic material. …
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The remineralization of marine organic matter by diverse biological and abiotic processes
… invoked as the dominant mass-balance sink for organic matter in the upper ocean, many other biological and abiotic processes can degrade particulate and dissolved substrates on globally significant scales. The relative strengths of these other remineralization processes — including mechanical …
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Microbial ecology of anaerobic carbon mineralization in Namibian shelf sediments
… the most productive upwelling systems on Earth. Organic matter degradation in the sediment drives hydrogen sulfide production, the maintenance of anoxia, and methane formation. Therefore, the primary aims of the thesis are to study carbon transformation processes within the sediment, determine …
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Assessment of the effects of greywater discharge by using streeter-phelps model
… the houses and accumulates in the drain. The organic pollutants and suspended particulate matter from greywater may cause depletion of oxygen content in the water which lead to unpleasant odours and increased organic matter degradation time. The aim of this study is to assess the effect of …
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Development of Aerobic Granular Sludge Membrane Bioreactor (AGMBR) to Mitigate Fouling
… AGMBR. And, the capability of AGMBR to remove organic matter, nitrogen, and phosphorus was determined. The combined strategy of long anaerobic slow feeding, fixed 1:3 ratio of feast-famine period within each SBR cycle, and continuous wasting of mature granules controlled EPS content at a …
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The remineralization of marine organic matter by diverse biological and abiotic processes
… invoked as the dominant mass-balance sink for organic matter in the upper ocean, many other biological and abiotic processes can degrade particulate and dissolved substrates on globally significant scales. The relative strengths of these other remineralization processes - including mechanical …
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Effects of anthropogenic land use on temperate mangrove forests
… chapter investigates environmental controls on organic matter degradation in mangrove forests. Results from this study emphasize the importance of considering multiple factors influencing degradation processes, that vary with the quality of the decaying organic matter. Furthermore, using the …
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Tīmata whakaora, kickstarting recovery - Using bivalves to bioremediate degraded estuarine sediments
… showing that increases in benthic metabolism and organic matter degradation are dependent on bivalve survival. The synthesis of these chapters offers insights into the potential of using adult ecosystem engineering bivalves, particularly A. stutchburyi, to facilitate estuarine recovery and places …
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The role of microbial populations in the cycling of iron and manganese from marine aggregates
… redox cycling of iron and manganese and to the degradation of<br/>organic matter.<br/>The release of dissolved iron from artificial aggregates which did not contain any<br/>measurable (~10 ?m) anoxic microzones, was demonstrated under dark conditions.<br/>The rate of release was controlled by …
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Benthic and pelagic responses to endobenthic bioturbator (Kraussillichirus kraussi) density, temperature and eutrophication in a global change mesocosm experiment
… inhabiting cool-temperate distribution ranges. Organic matter degradation rates increased under mesotrophic conditions and warming, particularly at high sandprawn densities, but was suppressed under eutrophic conditions, emphasising the importance of minimising nutrient loading to estuaries to …
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Holocene climate and environmental variability in NE Germany inferred from annually laminated lake sediments
… by microbial carbon cycling. In contrast, organic matter degradation controls δ13COM during phases of intensified lake circulation and more oxygenated conditions. The varve preservation indicates an increasing trend of lake circulation at Lake Tiefer See after ~4000 cal a BP. This trend is …
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An integrated approach of determining shale gas potentiality of carbonaceous shale of the Permian Tuli Basin, Limpopo Province of South Africa
… investigations, the source rock potential of organic-rich shale for gas generation remains elusive in the Permian Tuli Basin. As a result, this research aims to investigate the shale gas potentiality of the carbonaceous shale of Madzaringwe and Mikambeni Formations in the Tuli Basin of Limpopo …
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Decomposition and Production of Dissolved Organic Matter by Aquatic Bacteria
Aquatic ecosystems transport large amounts of organic matter from the landscape to the oceans. Along this pathway, heterotrophic bacteria rapidly cycle these compounds by acting as both degraders and producers of organic compounds. Understanding the ultimate fate of the organic matter and …