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 15 of 15 for “"biogas yield"”.
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Thermal hydrolysis and thermal alkaline pretreatment of waste activated sludge: comparison of effects on biogas yield, dewaterability, sludge liquor and cost-benefit analysis
… (TH) of waste activated sludge (WAS) on biogas yield increase, dewatering potential of digestate, return load increase and refractory COD using same sludge. Moreover, it was intended to compare economic viability of TAP and TH for an individual wastewater treatment plant (WWTP) with fully …
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Evaluation of solid food waste for biogas and manure production: a case study of the University of Venda Canteen Solid Food Waste
… adequate knowledge of the potential of FW for biogas and manure production could be the reason for the observed slow uptake of AD in South Africa. This study evaluated the energy and manure production potential of solid FW generated by a typical South African university (the University of …
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Experimental investigation of biogas production from feedlot cattle manure
… is rapidly increasing in South Africa. Biogas can be generated from biomass in an anaerobic digestion process and used to generate electricity and heat as an alternative energy source to fossil fuel generated electricity. This study is focused on the biogas generation from cattle manure. …
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Conventional and Advanced Thermal Hydrolysis in Sewage Sludge Pre-treatment
… before anaerobic digestion (AD) to enhance biogas production. Operating at elevated temperatures, THP also offers sludge disinfection for safe utilisation as fertiliser and improves sludge dewaterability. However, the requirement for high reaction temperatures presents drawbacks to the …
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IMPROVING THE CIRCULARITY OF BIODEGRADABLE BIOPLASTICS BY PRODUCING BIOGAS: A FULL-SCALE ASSESSMENT
… and increases process efficiency and biogas production. However, PLA shows poor biodegradability under anaerobic digestion (AD) conditions, requiring long retention times (HRTs) compared to industrial OFMSW plants’ HRTs. This limits their integration into biogas plants and their …
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Viability of substitution of electricity with biogas for thermal uses at Neudamm campus of the University of Namibia
… in rural areas has led to increased interest in biogas technology, particularly in developing regions. This thesis presents the design and evaluation of a low-cost biogas digester for the Neudamm Campus of the University of Namibia. The study adresses the campus's energy cost and the …
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Design and Optimization of Process Parameters in Bio-Gas Production Systems
… of greenhouses gases (CO2 among others). Biogas production is a key technology in the development of sustainable energy supply systems that aims to cover the energy demand using renewable sources and to mitigate greenhouse gas emissions. Biogas production can be achieved through anaerobic …
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Assessing the co-production of ammonia and methane for resource recovery optimization
… an interesting subject for ammonia recovery. For biogas, the pH of the microcosms was the most determinant factor in optimizing the methane fraction in the biogas. The Pearson test proved the correlation between pH and methane fraction, and the combinations with a pH higher than 7 had more methane …
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Improving the bioconversion of lignocellulosic feedstock to bio-fuels and chemicals
… was however poor, resulting in a 2.9% lower biogas yield in a equivalent two-stage system. The study therefore developed a treatment technique involving the use of cellulase and ferulic acid esterase enzyme combinations for the treatment of perennial rye grass. The enzyme cocktail at 0.202 ml …
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Alternative Waste Treatment System for Poultry Processing Plants
… 1. Determine the quantity and quality of biogas produced from the turkey processing wastewater (TPW) and COD reduction efficiency. 2. Design a waste treatment system and validate proof of concept for simultaneous P and N removal with a goal of attaining effluent concentrations of 0.1 mg/L …
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Impact of Ammonia and Long Chain Fatty Acids on Thermophilic Anaerobic Digestion of Swine Wastes
… at the same time producing renewable energy (biogas) as a by-product. However, thermophilic digestion is subject to inhibition by ammonia and long chain fatty acids (LCFA), both of which are prevalent in manure and animal processing wastewater. Several swine manure collection methods under …
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Optimisation of anaerobic digestion of organic solid waste for the production of quality compost for soil amendment
… combination of source separated wastes for biogas and compost production. Little information is available on factors affecting the combined anaerobic/aerobic treatment of source separated OFMSW and the soil enhancing qualities of the resulting post treated digestate (anaerobic digestate …
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Výtěžnost bioplynu z různých druhů substrátů
Cílem této bakalářské práce je popis výtěžnosti bioplynu z různých druhů substrátů. V úvodní části jsou zpracována základní fakta o anaerobní technologii, princip tvorby bioplynu a využití bioplynu v praxi. Hlavní část práce je věnována výtěžnosti bioplynu, je uvedeno několik druhů substrátů s …
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Development of a mathematical model for predicting bio-slurry temperature and subsequent gas production rate for underground brick-built biogas digester using ambient air temperature forecast
… to implement anaerobic digestion technology for biogas production as a strategy to enhance energy supply and poverty eradication in rural communities. Underground, brick, and mortar built fixed dome type digesters are the most deployed small-scale biogas technology in sub-Saharan Africa (SSA) …
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Improving integrated systems for algal biofuels and wastewater treatment
… concentrations of PHWW below 6.7%, producing a biogas yield of 0.5 ml/mg CODremoved, with a methane content of ~70%, and organic removal efficiency of ~50%. Higher concentrations of PHWW (≥ 13.3%) had an inhibitory effect on the AD process, as indicated by delayed, slower, or no biogas …