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.
Results
Showing 1 to 20 of 216 for “"Biogas"”.
-
International biogas applications
AD plants for the production of biogas have grown steadily in recent years. Animal slurry and sewage sludge have been traditionally used as feedstock for AD, however, substrates such as the organic fraction of municipal solid waste (OFMSW) and energy crops are preferred due to their higher methane …
-
Biogas production from novel substrates
Biogas production is the conversion of the organic material into methane (CH4) and carbon dioxide (CO2) under anaerobic conditions. Anaerobic digestion (AD) is widely used in continental and Scandinavian communities as both a waste treatment option and a source of renewable energy. Ireland however …
-
Small-scale biogas upgrading : feasibility study of small-scale biogas upgrading in Iceland and possible methods
Methods for upgrading biogas to vehicular standards, to reduce the need for petrol and diesel, are examined if feasible for small-scale upgrading. Water Scrubber adsorption and Membrane biogas separation where found feasible. The water scrubber system was found the only available option for …
-
Ecological and Economic Optimisation of Biogas Plants
This research project provides guidelines for biogas operators, planners and manufacturers with tangible suggestions for improvements in ecology and economy. In order to achieve this, 10 biogas plants in Bavaria (Germany) with an electric capacity from 30 kWel to 560 kWel are thoroughly analysed …
-
Catalytic Reforming of Biogas for Syngas Production
Biogas is a mixture of methane and carbon dioxide produced from the anaerobic microbial digestion of biomass. It is an inexpensive, local source of energy but is usually wasted because the CO₂ content dilutes the quality of the fuel. Dry and auto-thermal reforming are catalytic methods that convert …
-
Simulation, optimization and instrumentation of agricultural biogas plants
… renewable energy by anaerobic digestion (AD) in biogas plants has become increasingly popular due to its applicability to a great variety of organic material from energy crops and animal waste to the organic fraction of Municipal Solid Waste (MSW), and to the relative simplicity of AD plant …
-
Scaling down direct dimethyl ether synthesis for biogas conversion
The feasibility of direct DME synthesis from biogas conversion as a small scale energy storage system was studied. Anaerobic digestion (AD) of grass silage was used as a feedstock for production of biogas and it was found that grass silage has high affinity for methane enriched biogas. A …
-
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. …
-
Optimisation of biogas production from percolating packed bed anaerobic digesters
… 40 day period was found to produce little extra biogas. The performance compared favourably with other high solids waste digesters with gas yields of 0.305 m 3 /kg VS added and solids losses of 47% volatile solids and 64% cellulose being obtained over a 40 day period. No major problems of …
-
Design of advanced Catalysts and new Strategies for biogas Reforming
La valorización del biogás como recurso renovable representa un reto clave en el contexto actual de transición energética y lucha contra el cambio climático. Compuesto principalmente por metano y dióxido de carbono, el biogás es una fuente alternativa de carbono que puede contribuir …
-
Design of a two-stage multi-state experimental biogas reactor
… down waste and other feed materials and produces biogas. A biogas reactor, or anaerobic digester, is designed to conduct anaerobic digestion in a closed environment and to collect the produced biogas. This is an important field of study because biogas is a renewable energy source. If it can be …
-
Characterization of Biogas from Anaerobically Digested Dairy Waste for Energy Use
… dairy manure-derived agricultural waste produces biogas, a valuable energy resource. Anaerobic digestion offers an effective way to manage manure by addressing the principal problem of odor control while offering an opportunity to create energy from conversion of biogas with a system of combined …
-
Feasibility of an integrated biogas scrubber for a swine manure digester
… removal of carbon dioxide (CO$\sb2$) from the biogas produced by a swine manure anaerobic digester. This innovative scrubbing system was included in the original design of an existing full-scale digester, but had never been tested. The principle of operation was that ammonia (NH$\sb3$) gas …
-
A Theoretical and Experimental Study of Controllable Electricity Production via Biogas Plants
… in the future, controllable power production via biogas plants has great technical and economic potential. The main aim of this thesis is a new system design for controlled, demand oriented elec-tricity production via biogas plants, based on system analyses and parameter studies. Derived aims are …
-
Two-Phase Anaerobic Digestion to Reduce the NOx Emission Potential of Biogas
… wastes to be disposed of while producing useful biogas (CH<sub>4</sub> and CO<sub>2</sub>) for heat or power production, but in air basins with strict emissions limits, biogas combustion is difficult to implement due to the high costs of controlling NOx emissions. NOx production can be minimized …
-
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 …
-
Towards development of biogas production for New Zealand on-farm greenhouse gas reduction
… digestion (AD), by capturing methane as biogas and producing biofertiliser, offers a promising solution to reduce greenhouse gas (GHG) emissions and displace harmful chemical fertilisers. While AD technology is well-established in Europe, its application in New Zealand remains limited, …
-
The application of biogas technology in South Africa for small-scale energy production
… to the development of low-cost or "simple" biogas technology, i.e. the design, construction, operation and utilisation of relatively simple biogas systems in South Africa, and to explore the utilisation of the technology by lower-income groups in the rural areas of the country, particularly …
-
Method Development for the Synthesis of Anaerobic Digester Biogas with the Laboratory Environment
Biogas, a gaseous mixture produced during decomposition of organic matter, is a renewable, easily generated and common byproduct of anaerobic digestion at wastewater treatment plants (WWTP), landfills and agricultural operations. There is growing interest in researching and utilizing the energy …
Page 1 of 11