Journal
BIORESOURCE TECHNOLOGY
Volume 315, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2020.123890
Keywords
Anaerobic digestion; Conductive materials; Granular activated carbon; Low temperature; Network analysis
Funding
- Korea Environment Industry & Technology Institute (KEITI) through Project for developing innovative drinking water and wastewater technologies - Korea Ministry of Environment (MOE) [ARQ202001174001]
- Korea Environmental Industry & Technology Institute (KEITI) [ARQ202001174001] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [4199990614298] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Notwithstanding many efforts to increase the efficiency of anaerobic digestion at low-temperature (winter) conditions, a cost-effective and efficient method is lacking. This study proposes a low-cost method of lowtemperature (< 35 degrees C) anaerobic digestion of wastewater, involving supplementation with granular activated carbon (GAC). Supplementation with GAC was found to reduce the lag time by 29.8% (from 15.1 to 10.6 days) and increase the maximum methane production rate by 23.4% (from 6.4 to 7.9 mL/day) at 25 degrees C. Network analysis demonstrated a strong co-occurrence of Syntrophobacteriales and hydrogenotrophic methanogens (Methanobacteriaceae; WSA2; Methanoregulaceae). GAC supplementation can drastically reduce the time required for organic matter decomposition and methane production, thereby increase the efficiency of wastewater treatment.
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