title: Denitrifying sulfide removal process on high-salinity wastewaters in the presence of Halomonas sp.
abstract: Biological conversion of sulfide, acetate, and nitrate to, respectively, elemental sulfur (S(0)), carbon dioxide, and nitrogen-containing gas (such as N2) at NaCl concentration of 35-70 g/L was achieved in an expanded granular sludge bed (EGSB) reactor. A C/N ratio of 1:1 was noted to achieve high sulfide removal and S(0) conversion rate at high salinity. The extracellular polymeric substance (EPS) quantities were increased with NaCl concentration, being 11.4-mg/g volatile-suspended solids at 70 mg/L NaCl. The denitrifying sulfide removal (DSR) consortium incorporated Thauera sp. and Halomonas sp. as the heterotrophs and Azoarcus sp. being the autotrophs at high salinity condition. Halomonas sp. correlates with the enhanced DSR performance at high salinity.
authors.affiliation: College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China. liuchunshuang723@126.com.
authors.forename: Chunshuang
authors.initials: C
authors.lastname: Liu
authors.affiliation: College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China.
authors.forename: Dongfeng
authors.initials: D
authors.lastname: Zhao
authors.affiliation: College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China.
authors.forename: Wenjuan
authors.initials: W
authors.lastname: Ma
authors.affiliation: College of Chemical Engineering, China University of Petroleum, Qingdao, 266580, China.
authors.forename: Yadong
authors.initials: Y
authors.lastname: Guo
authors.affiliation: State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin, 150090, China.
authors.forename: Aijie
authors.initials: A
authors.lastname: Wang
authors.affiliation: Advanced Water Management Centre (AWMC), The University of Queensland, Brisbane, QLD, 4072, Australia.
authors.forename: Qilin
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Department of Chemical Engineering, National Taiwan University, Taipei, 10617, Taiwan. djlee@ntu.edu.tw.|Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei, 10607, Taiwan. djlee@ntu.edu.tw.
authors.forename: Duu-Jong
authors.initials: DJ
authors.lastname: Lee
mesh_terms: D001673:Biodegradation, Environmental; D058440:Denitrification; D020632:Halomonas / Q000254:growth & development / Q000378:metabolism*; D012965:Sodium Chloride / Q000032:analysis / Q000378:metabolism; D013440:Sulfides / Q000737:chemistry / Q000378:metabolism*; D062065:Wastewater / Q000737:chemistry / Q000382:microbiology*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*
chemical_list: D012965:Sodium Chloride; D013440:Sulfides; D062065:Wastewater
keywords: Denitrifying sulfide removal; EGSB; Elemental sulfur; High salinity