Journal
BIORESOURCE TECHNOLOGY
Volume 205, Issue -, Pages 205-212Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.01.054
Keywords
Anaerobic digestion; Direct interspecies electron transfer; Geobacter; Granular activated carbon; Methanogenesis
Funding
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science, ICT and Future Planning [2013R1A1A1076048]
- Korea University
- National Research Foundation of Korea [2013R1A1A1062664, 2013R1A1A1076048] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
Direct interspecies electron transfer (DIET) via conductive materials can provide significant benefits to anaerobic methane formation in terms of production amount and rate. Although granular activated carbon (GAC) demonstrated its applicability in facilitating DIET in methanogenesis, DIET in continuous flow anaerobic reactors has not been verified. Here, evidences of DIET via GAC were explored. The reactor supplemented with GAC showed 1.8-fold higher methane production rate than that without GAC (35.7 versus 20.1 +/- 7.1 mL-CH4/d). Around 34% of methane formation was attributed to the biomass attached to GAC. Pyrosequencing of 16S rRNA gene demonstrated the enrichment of exoelectrogens (e.g. Geobacter) and hydrogenotrophic methanogens (e.g. Methanospirillum and Methanolinea) from the biomass attached to GAC. Furthermore, anodic and cathodic currents generation was observed in an electrochemical cell containing GAC biomass. Taken together, GAC supplementation created an environment for enriching the microorganisms involved in DIET, which increased the methane production rate. (C) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available