Part of the book series: Clean Energy Production Technologies ((CEPT))

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Abstract

Biogas is a gaseous fuel comprising methane and carbon dioxide as major constituents. It is produced by microbial consortium of acidogenic, acetogenic and methanogenic bacteria in the absence of oxygen from the organic substrates through anaerobic digestion. Main advantage of the process is a variety of organic wastes like wastewater, municipal solid waste and agrowaste can be used as the feed. Anaerobic digestion can be integrated with other processes like fermentation or microalgae cultivation for liquid fuel production. Disposal of produced carbon dioxide and ammonia is the main challenge. Conversion of CO2 to valuable product like methane and post-treatment of digestate from anaerobic digestion can make waste disposal safer for environment leading to a better circular economy. This chapter gives an overview of biogas production, integration of anaerobic digestion process with other processes to produce biofuels and chemicals. It also briefs the significance of post-treatment of digestate after anaerobic digestion for an improved biorefinery.

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Abbreviations

AD:

Anaerobic digestion

CSTR:

Continuous Stirred-Tank Reactor

MSW:

Municipal Solid Waste

VFA:

Volatile Fatty Acids

ANR:

Advanced/Autotrophic Nitrogen Removal

PN:

Partial Nitritation

Anammox:

Anaerobic Ammonium Oxidation

HRAP:

High Rate Algal Ponds

TDS:

Total Dissolved Solids

MEM:

Mountain Effective Micro-organisms

PS:

Polysulphone

PES:

Polyether Sulphone

PVDF:

Polyvinylidene Fluoride

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All the authors declare that they have no competing interests.

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Correspondence to Arun Goyal .

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Jamaldheen, S.B., Goyal, A. (2020). Biogas Biorefinery. In: Verma, P. (eds) Biorefineries: A Step Towards Renewable and Clean Energy. Clean Energy Production Technologies. Springer, Singapore. https://doi.org/10.1007/978-981-15-9593-6_19

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