Read e-book online Anaerobic Biotechnology for Bioenergy Production: Principles PDF

By Samir Kumar Khanal

ISBN-10: 0813823463

ISBN-13: 9780813823461

Anaerobic biotechnology is an economical and sustainable technique of treating waste and wastewaters that therapy techniques with the reclamation of worthwhile by-products and renewable biofuels. this suggests of treating municipal, agricultural, and commercial wastes permits waste items to be switched over to value-added items similar to biofuels, biofertilizers, and different chemical compounds. Anaerobic Biotechnology for Bioenergy creation: rules and functions presents the reader with easy rules of anaerobic techniques along functional makes use of of anaerobic biotechnology strategies. This booklet might be a worthwhile connection with any specialist at present contemplating or operating with anaerobic biotechnology concepts.

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New York, USA. Parkin, G. , and Owen, W. F. 1986. Fundamentals of anaerobic digestion of wastewater sludges. J. Environ. Eng. ASCE 112(5):867–920. Pohland, F. G. 1992. Anaerobic treatment: Fundamental concept, application, and new horizons. In Design of Anaerobic Processes for the Treatment of Industrial and Municipal Wastes, edited by J. F. , and F. G. Pohland, pp. 1–40. , Lancaster, USA. , Griffin, M. , Stroot, P. , and Misra, P. 1995. Characterization of microbial communities in anaerobic bioreactors using molecular probes.

1993). 3. Selected substrates and energy yields by methanogens. 5CO2 + H2 S G (kJ/mol) −139 −127 −28 −103 −102 −74 Source: Oremland (1988). Reprinted with permission. 3. The source of H2 is the catabolic product of other bacteria in the system, such as hydrogen-producing fermentative bacteria, especially Clostridia (group 1) and hydrogen-producing acetogenic bacteria (group 2). The hydrogenotrophic pathway contributes up to 28% of the methane generation in an anaerobic treatment system. It bears mentioning that there are many H2 -using methanogens that can use formate as a source of electrons for the reduction of CO2 to methane (Reaction (B)).

1993). Methanogens are obligate anaerobes and considered as a rate-limiting species in anaerobic treatment of wastewater. Abundant methanogens are found in anaerobic environments rich in organic matter such as swamps, marshes, ponds, lake and marine sediments, and the rumen of cattle. 1 Metabolism Methanogenesis occurs through three major pathways: CO2 -reducing or hydrogenotrophic methanogenesis, acetotrophic or aceticlastic methanogenesis, and methylotrophic pathways. The CO2 -reducing pathways use a series of four twoelectron reductions to convert CO2 or HCO3 − to methane (Boone et al.

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Anaerobic Biotechnology for Bioenergy Production: Principles and Applications by Samir Kumar Khanal


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