Topic
Biogas
About: Biogas is a research topic. Over the lifetime, 28571 publications have been published within this topic receiving 498545 citations.
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TL;DR: High-throughput 16S rRNA sequencing revealed that the microbial community was resided by novel phylotypes belonging to the uncultured order MBA08 and to Bacteroidales, and only hydrogenotrophic methanogens were identified belonging to Methanothermobacter and Methanoculleus genera.
230 citations
TL;DR: In this article, the authors investigated the costs of biogas and electricity production from maize silage in relation to plant size, and derived a reliable relationship between the capacity of a combined heat and power (CHP) unit and its electrical efficiency.
Abstract: The costs of biogas and electricity production from maize silage in relation to plant size are investigated in this paper. A survey of manufacturers’ engineering data was conducted to derive a reliable relationship between the capacity of a combined heat and power (CHP) unit and its electrical efficiency. Then a model was developed to derive cost curves for the unit costs of biogas and electricity production and for the transport costs for maize silage and biogas slurry. The least-cost plant capacity depends to a great extent on the local availability of silage maize, and ranges in the model calculations from 575 to 1150 kW el . Finally, the paper deals with the optimum operating plant size due to the investment support available and the graduated tariff for green electricity in Austria.
229 citations
TL;DR: Dewatering investigations suggested that the acid pretreated WAS required 40% less cationic polymer addition to achieve the same cake solid content, and optimisation of acid dosing was performed considering digestibility benefits and level of acid required.
229 citations
TL;DR: In this paper, a novel technique to separate high and fluctuating amounts of hydrogen sulphide from raw biogas is presented that relies on a highly intensified method of chemical-oxidative scrubbing.
228 citations
TL;DR: In this article, a multiscale design of membrane-based gas separation is analyzed in detail, including membrane materials, gas permeation modules, and their respective operation as well as gas-permeation processes for biogas upgrading.
Abstract: Upgrading biogas, i.e., the removal of CO2 from CH4 is an attractive regenerative energy as it is supplied continuously. Conventional upgrading techniques such as absorption or adsorption require significant amounts of energy and require equipment of large size. Hence, we give an overview on gas permeation membrane processes which are applied in biogas upgrading. Here, we consider the upgrading process as a whole. The multiscale design of membrane-based gas separation is analyzed in detail. Membrane materials, gas permeation modules and their respective operation as well as gas permeation processes for biogas upgrading are investigated. Applying gas permeation modules, compression of the feed gas should be used since it is energy efficient for gases with high amounts of CO2. Single stage gas permeation processes are not able to produce a high CH4 purity and simultaneously obtain a high CH4 recovery. Hence, multistage concepts are mandatory. Membrane-based upgrading systems are an interesting alternative to conventional biogas upgrading equipment and we expect that they will significantly contribute to the energy supply of the future.
227 citations