title: Long-term performance of anaerobic digestion for crop residues containing heavy metals and response of microbial communities.
abstract: In order to investigate the long-term stability on the performance of the anaerobic digestion process, a laboratory-scale continuous stirred-tank reactor (CSTR) was operated for 1100 days with sunflower harvested in a heavy metal contaminated site. Changes of microbial communities during digestion were identified using pyrosequencing. According to the results, soluble heavy metal concentrations were lower than the reported inhibitory level and the reactor performance remained stable up to OLR of 2.0g-VS/L/day at HRT of 20days. Microbial communities commonly found in anaerobic digestion for cellulosic biomass were observed and stably established with respect to the substrate. Thus, the balance of microbial metabolism was maintained appropriately and anaerobic digestion seems to be feasible for disposal of heavy metal-containing crop residues from phytoremediation sites.
authors.affiliation: Department of Civil and Environmental Engineering, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
authors.forename: Jongkeun
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Civil and Environmental Engineering, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea.
authors.forename: Joonrae Roger
authors.initials: JR
authors.lastname: Kim
authors.affiliation: Environmental Risk & Welfare Research Team, Seoul Center, Korea Basic Science Institute, Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
authors.forename: Seulki
authors.initials: S
authors.lastname: Jeong
authors.affiliation: Department of Environmental and Energy, College of Engineering, Sejong University, 209 Neungdong-ro, Gwangjin-Gu, Seoul 05006, Republic of Korea.
authors.forename: Jinwoo
authors.initials: J
authors.lastname: Cho
authors.affiliation: Department of Civil and Environmental Engineering, College of Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea. Electronic address: jaeykim@snu.ac.kr.
authors.forename: Jae Young
authors.initials: JY
authors.lastname: Kim
mesh_terms: D000693:Anaerobiosis; D001419:Bacteria / Q000378:metabolism; D001673:Biodegradation, Environmental; D018533:Biomass; D019149:Bioreactors; D006368:Helianthus; D019216:Metals, Heavy / Q000737:chemistry; D012722:Sewage / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D019216:Metals, Heavy; D012722:Sewage
keywords: Anaerobic digestion; Crop residues; Heavy metals; Pyrosequencing; Sunflower