Journal
WASTE MANAGEMENT
Volume 59, Issue -, Pages 498-507Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2016.10.005
Keywords
Anaerobic digestion; Crop residues; Heavy metals; Pyrosequencing; Sunflower
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Funding
- Korea Ministry of Environment as Waste to Energy-Recycling Human Resource Development Project
- Korea Ministry of Education through the Brain Korea 21 Plus research program
- National Research Foundation of Korea [21A20151813143] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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 2.0 g-VS/L/day at HRT of 20 days. Microbial communities commonly found in anaerobic digestion for cellulosic bio-mass 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. (C) 2016 Elsevier Ltd. All rights reserved.
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