• Hemant M. Jariwala
• Yogesh C. Rotliwala

The need of new sustainable sources of energy is on the top priority to fulfil the demand of energy at different corners today. Biogas is one distinct source from other renewable energy providing sources because of its environment friendly as well as economic characteristics. Biogas does not have any geographical limitations nor it requires advancedtechnology for producing energy, it is also very simple to use and apply.Although, Biogas generated from anaerobic digestion process is a clean, carbon neutral and environmental friendly energy alternative, raw biogas needs to be purified necessarily before using. The removal of impurities from raw biogas which is referred as enrichment ensures its better applications and also enhances its calorific value. Fundamental aspects of anaerobic digestion are briefly described in the paper. The paper mainly includes various biogas enrichment techniques and their comparative studies have been made. A novel technique of bio-electrochemical technique has also been briefly discussed.

fossil fuels, biogas, bio-methane, renewable, enrichment, bio-electrochemical

"BIO-ELECTROCHEMICAL CONVERSION OF CO 2 TO CH 4 TOWARDS ENRICHMENT OF BIOGAS: A REVIEW ON BES AN EMERGING TECHNOLOGY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.35-43, January-2019, Available :http://www.jetir.org/papers/JETIR1901J06.pdf

"BIO-ELECTROCHEMICAL CONVERSION OF CO 2 TO CH 4 TOWARDS ENRICHMENT OF BIOGAS: A REVIEW ON BES AN EMERGING TECHNOLOGY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp35-43, January-2019, Available at : http://www.jetir.org/papers/JETIR1901J06.pdf