Effect of nickel-containing activated carbon on food waste anaerobic digestion. (October 2018)

• Record Type: Journal Article
• Authors: Ko, Jae Hac; Wang, Ning; Yuan, Tugui; Lü, Fan; He, Pinjing; Xu, Qiyong
• Is Part Of: Bioresource technology. Volume 266(2018)
• Page Start: 516
• Page End: 523
• Publication Date: 2018-10
• Subjects: Anaerobic digestion -- Food waste -- Nickel-containing activated carbon -- Methane production rate; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.07.015
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: AC-Ni could reduce the lag phase of food waste anaerobic digestion. The methane production rate was increased by AC-Ni addition. The evolution and activity of microbes were promoted with the addition of AC-Ni. AC-Ni could accelerate the degradation of volatile fatty acids. The environmental risks of AC-Ni could be reduced by anaerobic digestion. Abstract: Anaerobic digestion (AD) is frequently restricted with the long lag phase and low methane (CH4 ) production rate. Laboratory batch experiments were conducted to investigate the impact of different supplements on the performance of food waste AD, including AC-Ni, AC, and Ni. Results showed that the lag phase of AD was reduced with the addition of those supplementations. Compared with the control group without any supplementation, the AC-Ni could shorten the lag phase by 67% and increase the maximum CH4 production rate by 50%, respectively. The speciation analysis indicated that the environmental risks of the AC-Ni was reduced by 30% after digestion. Microbial community structure analysis revealed that the AC-Ni promoted the evolution and activity of the hydrolytic-fermentative bacteria (e.g. Firmicutes and Bacteroidetes ) and methanogens (e.g. Methanobacterium, Methanoregula and Methanomassiliicoccus ). This study suggested that the AC-Ni waste could be feasible to be applied to enhance the performance of AD.