Photocathode optimization and microbial community in the solar-illuminated bio-photoelectrochemical system for nitrofurazone degradation. (April 2020)

• Record Type: Journal Article
• Authors: Hou, Yanping; Yuan, Guiyun; Qin, Shanming; Tu, Lingli; Yan, Yimin; Yu, Zebin; Lin, Hongfei; Chen, Yongli; Zhu, Hongxiang; Song, Hainong; Wang, Shuangfei
• Is Part Of: Bioresource technology. Volume 302(2020)
• Publication Date: 2020-04
• Subjects: Bio-photoelectrochemical system (BPES) -- g-C3N4/CdS photocathode optimization -- Microbial community -- Nitrofurazone degradation; 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.2020.122761
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: The g-C3 N4 /CdS photocathode in the bio-photoelectrochemical system was optimized. The performance of bio-photoelectrochemical system was further enhanced with the optimized photocathode. The microbial community shift from inoculation to the bio-photoelectrochemical system was revealed. Proteobacteria, was the most dominant phylum, accounting for 74.67% in bio-photoelectrochemical system anode. Abstract: To further enhance the bio-photoelectrochemical system (BPES) performance for nitrofurazone (NFZ) degradation and current output, the g-C3 N4 /CdS photocathode was optimized, and microbial community shift from inoculation to the BPES was analyzed. Results showed that photocathode with g-C3 N4 /CdS (mass ratio of 1:9) loading of 7.5 mg/cm 2 exhibited the best performance, with NFZ removal of 83.14% (within 4 h) and current of ~9 mA in the BPES. Proteobacteria accounted for the largest proportion: 66.53% (inoculation), 71.89% (microbial electrolysis cell (MEC) anode), 74.67% (BPES anode) and 57.31% (BPES cathode), respectively. In addition, Geobacter was the most dominant genus in MEC and BPES anode and cathode, which occupied 31.64%, 67.73% and 41.34%, respectively. The microbial compositions of BPES anode and cathode were similar, but different from that of MEC anode. Notably, Rhodopseudomonas, a photosynthetic species, was detected in the BPES. Cognition of microbial community in the BPES is important for advancing its development.