Long-term performance of anaerobic digestion for crop residues containing heavy metals and response of microbial communities

• Jongkeun Lee ^[1] ; Joonrae Roger Kim ^[1] ; Seulki Jeong ^[2] ; Jinwoo Cho ^[3] ; Jae Young Kim ^[1]
  1. [1] Seoul National University

     Seoul National University

     Corea del Sur

     
  2. [2] Korea Basic Science Institute

     Korea Basic Science Institute

     Corea del Sur

     
  3. [3] Sejong University

     Sejong University

     Corea del Sur

     

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• Localización: Waste management, ISSN-e 0956-053X, Vol. 59, 2017, págs. 498-507
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • 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 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.