Rapid of cultivation dissimilatory perchlorate reducing granular sludge and characterization of the granulation process. (March 2019)

• Record Type: Journal Article
• Authors: Yin, Pengna; Guo, Jianbo; Xiao, Shumin; Chen, Zhi; Song, Yuanyuan; Ren, Xiaoning
• Is Part Of: Bioresource technology. Volume 276(2019)
• Page Start: 260
• Page End: 268
• Publication Date: 2019-03
• Subjects: Perchlorate -- Inoculated sludge -- Up-flow velocity -- Granular sludge -- Microbial community structure; 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.2018.12.070
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Perchlorate reducing granular sludge (DPR-GS) was first cultivated in UASB. DGS maintained the nucleus stability and directly served as carriers for DPR-GS. The fluctuating up-flow velocity strategy can alleviate biomass loss. Sulfurospirillum and Acinetobacter were the dominant DPRB. Abstract: To remove high-strength perchlorate, dissimilatory perchlorate reducing granular sludge (DPR-GS) was first cultivated. Three identical UASB reactors were set up under different seed sludge and up-flow velocities (RAS : active sludge (AS) and constant up-flow velocities; RDGS : denitrifying granular sludge (DGS) and constant up-flow velocities; RDGS-f : DGS and fluctuating up-flow velocities). The AS in the RAS was completely granulated by day 117, while the DGS in the RDGS and RDGS-f were both shortened the granulation time to 99 days. In addition, the fluctuating up-flow velocity can better ensure rapid cultivation of DPR-GS. Removal of ClO4 − loading rate with 7.20 kg/(m 3 ·d) occurred in all three reactors. The results of extracellular polymeric substances (EPS) composition analysis indicated the polysaccharose (PS) promoted the formation of bio-aggregates, while the protein (PN) benefited the granulation of sludge. The analyses of the microbial communities indicated that Sulfurospirillum and Acinetobacter were the dominant dissimilatory perchlorate reducing bacteria.