Enhancing anaerobic digestion for rural wastewater treatment with granular activated carbon (GAC) supplementation
- Authors
- Park, Jeong-Hoon; Park, Jong-Hun; Lee, Sang-Hoon; Jung, Sokhee P.; Kim, Sang-Hyoun
- Issue Date
- Nov-2020
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Anaerobic digestion; Conductive materials; Granular activated carbon; Low temperature; Network analysis
- Citation
- BIORESOURCE TECHNOLOGY, v.315
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIORESOURCE TECHNOLOGY
- Volume
- 315
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/52042
- DOI
- 10.1016/j.biortech.2020.123890
- ISSN
- 0960-8524
- Abstract
- 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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