Anaerobic digestion as an alternative disposal for phytoremediated biomass from heavy metal contaminated sites. (December 2018)

• Record Type: Journal Article
• Authors: Lee, Jongkeun; Park, Ki Young; Cho, Jinwoo; Kwon, Eilhann E.; Kim, Jae Young
• Is Part Of: Environmental pollution. Volume 243(2018)Part B
• Page Start: 1704
• Page End: 1709
• Publication Date: 2018-12
• Subjects: Anaerobic digestion -- Biogas -- Biomass -- Cytotoxic effect -- Heavy metals; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2018.09.108
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: It is desirable to establish an environmentally benign platform for disposing biomass from the phytoremediation process while recovering energy is of importance. To this end, the biochemical methane potential (BMP) tests were conducted using four different biomass samples ( i.e., sunflower: Helianthus annuus ) that were obtained from the different remediation sites. In particular, this study laid great emphasis on evaluating the inhibition for the anaerobic digestion (AD) process induced by endogenous heavy metal (Cd, Cu, Ni, Pb, and Zn) content in biomass. Despite the high levels of heavy metal contents (Cd: 58.4, Cu: 23.0, Ni: 2.01, Pb: 9.88, and Zn: 146 mg kg −1 ) in the substrate for the AD process, the overall performance was comparable relative to the case of the references. Therefore, this study signified that the inhibition derived from heavy metals was nearly negligible, which suggested that biomass from the phytoremediation site could be used as a substrate for the AD process. Graphical abstract: Image Highlights: AD of phytoremediated biomass may attractive in terms of energy recovery potential. Endogenous contaminant effects onto AD performance should be considered. BMP tests were conducted to evaluate AD performance for phytoremediated biomass. A green process, AD for heavy metal phytoremediated biomass, seems to be feasible.