Bio-mixotrophic perchlorate reduction to control sulfate production in a step-feed sulfur-based reactor: A study of kinetics, ORP and bacterial community structure. (December 2018)

• Record Type: Journal Article
• Authors: Zhang, Chao; Guo, Jianbo; Lian, Jing; Song, Yuanyuan; Lu, Caicai; Li, Haibo
• Is Part Of: Bioresource technology. Volume 269(2018)
• Page Start: 40
• Page End: 49
• Publication Date: 2018-12
• Subjects: Perchlorate -- Step-feed -- Sulfur-based -- Oxidation-reduction potential -- Microbial community structure -- Principal component analysis; 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.2018.08.084
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A high perchlorate reduction rate was obtained by step-feeding. Sulfate concentration can be decreased by step-feeding. The biodiversity along the height of reactor was decreased by step-feeding. Relationships between primary microbes and environment were analyzed. Abstract: Excess sulfate production and low concentration of perchlorate removal are the main problems for sulfur-based perchlorate reduction reactor. In this study, the problems were firstly solved by step-feeding under mixotrophic conditions. The performances of step-feed sulfur-based reactor (SFSBR) and up-flow sulfur-based reactor (UFSBR) are compared. At perchlorate of 194 mg/L, acetate of 28.8 mg/L and hydraulic retention time of 0.9 h, the Half-order reaction rate constant and the sulfate production of SFSBR were 29.7 mg 1/2 /L 1/2 ·h and 171 mg/L, respectively, which were superior to those of UFSBR. The oxidation-reduction potential values of SFSBR were lower than that of UFSBR. Meanwhile, the biodiversity along the height of the reactor was decreased by step-feeding. Principal component analysis showed significant interrelations existed among the bacterial community composition and the operational/environmental conditions in each treatment zone. Consequently, the SFSBR provides an effectively alteration for the removal of high perchlorate concentration and control sulfate.