Enhancement of anaerobic methanogenesis at a short hydraulic retention time via bioelectrochemical enrichment of hydrogenotrophic methanogens

Publication Type:
Journal Article
Citation:
Bioresource Technology, 2016, 218 pp. 505 - 511
Issue Date:
2016-10-01
Metrics:
Full metadata record
Files in This Item:
Filename Description Size
1-s2.0-S0960852416309361-main.pdfPublished Version963.79 kB
Adobe PDF
© 2016 Elsevier Ltd Anaerobic digestion (AD) is an important energy strategy for converting organic waste to CH4. A major factor limiting the practical applicability of AD is the relatively long hydraulic retention time (HRT) which declines the treatment efficiency of digesters. A coupling process of anaerobic digestion and ‘electromethanogenesis’ was proposed to enhance anaerobic digestion at a short HRT in this study. Microorganisms analysis indicated that the electric-biological reactor enriched hydrogenotrophic methanogens in both cathodic biofilm and suspended sludge, helping achieve the high organic removal (71.0% vs 42.3% [control reactor]) and CH4production (248.5 mL/h vs 51.3 mL/h), while the additional electric input was only accounted for 25.6% of the energy income from the increased CH4production. This study demonstrated that a bioelectrochemical enhanced anaerobic reactor could improve the CH4production and organic removal at a short HRT, providing an economically feasible scheme to treat wastewater.
Please use this identifier to cite or link to this item: