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 14 of 14 for “"acidogenesis"”.
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Transcriptomic analyses of Clostridium beijerinckii NCIMB 8052 during transition from acidogenesis to solventogenesis and under butyrate supplemented conditions
… with comparatively more active expression during acidogenesis phase. The expression of acid formation genes was down-regulated at the onset of solvent formation, in accordance with the metabolic pathway shift from acidogenesis to solventogenesis. The sol operon genes, were highly-coordinately …
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Molecular characterization of microbial communities in small-scale biodigesters using whole genome shotgun metagenomic approach
… excrement, through four key phases: hydrolysis, acidogenesis, acetogenesis, and methanogenesis, resulting in digestate and biogas production. Advances in metagenomic techniques, surpassing traditional culture-based methods, have enabled a deeper characterization of the microbial populations …
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Carbon and nitrogen removal in a granular bed baffled reactor
… is to achieve an optimum growth environment for acidogenesis and methanogenesis. Such wastewaters with high nutrient levels could cause additional problems as anaerobic units are usually designed for the removal of organic matter. In addition, nitrate inhibition to methanogenesis in anaerobic …
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Changes in Dewatering Properties Between the Thermophilic and Mesophilic Stages in TPAD Systems
… sludges varied little with thermophilic SRT. Acidogenesis was essentially complete after 1.5 days. Subsequent mesophilic digestion resulted in little change to dewatering properties and modest reductions in conditioning doses, but substantial reductions in biopolymer (protein + …
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Development of a headspace solid-phase microextraction (HS-SPME) procedure for the determination of short-chain fatty acids (SCFAs) in activated sludge by GC-FID
… have significant effects on hydrolysis and acidogenesis. However, investigations into the effects of these variables have until now been conducted individually. In the present work, a comprehensive study of the effects of these variables on the fermentation process was carried out, following …
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Avaliação da produção de hidrogênio e metano a partir da codigestão anaeróbia de resíduos
… through anaerobic codigestion in two phases (acidogenesis and methanogenesis) of organic waste (OW), sewage sludge (SS) and raw glycerol (GL), was investigated in batch assays under temperature controlled conditions. The effect of glycerol addition (1 and 3% v/v) as cosubstrate was assessed in …
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Integrating bio-based resource recovery and treatment into municipal solid waste management in developing countries: a focus on anaerobic digestion
… AD occurs in four main phases (hydrolysis, acidogenesis, acetogenesis and methanogenesis) and is a complex process, where microbiological, biochemical and physico-chemical phenomena are closely linked. Although composting the organic fraction of MSW (OFMSW) has been the preferred treatment …
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Development of a reporter system for the study of gene expression for solvent production in Clostridium beijerinckii NRRL B592 and Clostridium acetobutylicum ATCC 824
… promoter was at a low and similar level during acidogenesis and solventogenesis. The expression pattern of the adh gene under the control of the promoter of the adh gene differed from that under the control of the promoter of the fer gene.
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Factors Influencing the Production of Methane during the Anaerobic Digestion of Poultry Wastes
… bed type digester. Successful hydrolysis and acidogenesis occurred but methanogenesis was inhibited by NH4 + - N concentrations of up to 13,314 mgl -1. Replacing the liquor allowed intiation of Methane production during the digestion of manure but not litter.<br/><br/>A study of Monod growth …
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Development of a new high-rate anaerobic process for the treatment of industrial and domestic wastewaters: the anaerobic migrating blanket reactor (AMBR)
… This also prevented total phase separation of acidogenesis and methanogenesis in the AMBR;Laboratory-scale AMBR systems have achieved high organic removal efficiencies when fed with non-acidified sucrose as a substrate at chemical oxygen demand (COD) loading rates up to 30 g/L/d. Furthermore, …
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A mathematical model of a high sulphate wastewater, anaerobic treatment system
… These include hydrolysis of solid substrates, acidogenesis, beta oxidation of long chain fatty acids, acetogenesis and methanogenesis. By incorporating terms for these reactions, the model is able to simulate sulphate reduction using a wide range of carbon sources. A comprehensive literature …
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Stoichiometry and kinetic modeling of an anaerobic baffled reactor, The
… that perform the sequential steps of hydrolysis, acidogenesis, acetogenesis, and methanogenesis, in the conversion of complex organic material to methane. An understanding of the stoichiometry and kinetics of an ABR receiving raw wastewater influent at ambient temperatures, is lacking. It is …
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Total proton flux and balancing in genome-scale models: The case for the updated model of Clostridium acetobutylicum ATCC 824
Genome-scale modeling and new strategies for constraining these models were applied in this research to find new insights into cellular metabolism and identify potential metabolic engineering strategies. A newly updated genome-scale model for Clostridium acetobutylicum, iMM864, was constructed, …
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Παραγωγή οργανικών οξέων από τυρόγαλο παρουσία κίσσηρης και γ-αλουμίνας ως προωθητές
Στις μέρες μας παρατηρείται έντονο ενδιαφέρον για τη διαχείριση και την αξιοποίηση των αγροτοβιομηχανικών αποβλήτων πριν την απόρριψη τους στο περιβάλλον. Η αξιοποίηση του τυρογάλακτος, ένα από τα κύρια απόβλητα, για την ταυτόχρονη παραγωγή οργανικών οξέων και αιθανόλης μέσω διεργασίας αναερόβιας …