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: Microwave pretreatment was found to be superior over the thermal treatment with respect to sludge solubilization and biogas production and showed better degree of sanitation.
174 citations
TL;DR: Analysis of biogas production in AnMBRs revealed that the heat required to achieve mesophilic temperatures in the reactor was only possible with influent wastewater strengths above 4–5 g COD L−1, and the general trend of the submerged configuration, which is less energy intensive than the sidestream configuration in aerobic systems, was not observed.
Abstract: A modelling study has been developed in which the energy requirements of aerobic and anaerobic membrane bioreactors (MBRs) are assessed in order to compare these two wastewater treatment technologies. The model took into consideration the aeration required for biological oxidation in aerobic MBRs (AeMBRs), the energy recovery from methane production in anaerobic MBRs (AnMBRs) and the energy demands of operating submerged and sidestream membrane configurations. Aeration and membrane energy demands were estimated based on previously developed modelling studies populated with operational data from the literature. Given the difference in sludge production between aerobic and anaerobic systems, the model was benchmarked by assuming high sludge retention times or complete retention of solids in both AeMBRs and AnMBRs. Analysis of biogas production in AnMBRs revealed that the heat required to achieve mesophilic temperatures (35°C) in the reactor was only possible with influent wastewater strengths above 4–5 g CO...
174 citations
TL;DR: The available microbial technologies based on hydrogen-mediated CH4 enrichment, in particular ex-situ, in-suit and bioelectrochemical, are compared and discussed and gas-liquid mass transfer limitations, and dynamics of bacteria-archaea interactions shift after H2 injection are thoroughly discussed.
174 citations
TL;DR: In this article, the authors investigated the prospects and challenges for expanding sustainable biogas energy in Poland and discussed the current economical incentives for biOGAS energy. But they did not consider the role of agrobiogas in solving Polish CCS dilemmas.
Abstract: The article investigates prospects and challenges for expanding of sustainable biogas energy in Poland. The number of Polish biogas fuelled power plants and installed electrical power during the 2001–2010 decade is presented. Current economical incentives for biogas energy are discussed. It is emphasized that some revisions to the Polish tradable certificate system are urgently needed in order to encourage energy crop cultivation and the use of best available power technologies. Further, promising, but mostly unexplored feedstocks, such as energy crops, grasses and sorted municipal organic wastes are analyzed. It is also revealed that agrobiogas is characterized by a unique feature of ‘negative net’ CO2 atmospheric emissions and thus the role of agrobiogas in solving Polish CCS dilemmas is discussed. In regard to biogas energy systems it is stressed, that the cost of electricity from biogas is almost independent on the size of agrobiogas CHP power plants in the range of 0.2–5 MWe. Therefore agrobiogas energy is well suited for distributed energy systems involving small-scale agrobiogas power plants offering more green jobs and improved local waste management characteristics. Finally, reliable technologies suitable for biogas energy conversion and upgrading of biogas fuel to marketable gaseous fuels are briefly characterized.
174 citations
TL;DR: In this article, the authors assessed the biogas potential of energy crops (maize and grass silage) and solid manure fractions from manure separation units, and determined the ultimate methane productivity in terms of volatile solids (VS) was determined as 330, 161, 230, 236, 361, 361 L/kg VS from raw pig slurry, filter pressed manure fiber, chemically precipitated manure fiber (CPMF), maize silage and Grass silage respectively.
174 citations