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Response of sulfur-metabolizing biofilm to external sulfide in element sulfur-based denitrification packed-bed reactor.
Bao, Hong-Xu; Wang, Han-Lin; Wang, Shu-Tong; Sun, Yi-Lu; Zhang, Xue-Ning; Cheng, Hao-Yi; Qian, Zhi-Min; Wang, Ai-Jie.
Affiliation
  • Bao HX; College of the Environment, Liaoning University, Shenyang, 110036, PR China.
  • Wang HL; College of the Environment, Liaoning University, Shenyang, 110036, PR China.
  • Wang ST; College of the Environment, Liaoning University, Shenyang, 110036, PR China.
  • Sun YL; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China. Electronic address: ylsun@rcees.ac.cn.
  • Zhang XN; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China.
  • Cheng HY; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; State Key Laboratory of Urban Water Resources and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzh
  • Qian ZM; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; State Key Laboratory of Urban Water Resources and Environment, School of Civil and Environmental Engineering, Harbin Institute of Technology Shenzhen, Shenzh
  • Wang AJ; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, PR China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China; State
Environ Res ; 231(Pt 1): 116061, 2023 Aug 15.
Article de En | MEDLINE | ID: mdl-37149027
Dosing sulfide into the sulfur-packed-bed (S0PB) has great potential to enhance the denitrification efficiency by providing compensatory electron donors, however, the response of sulfur-metabolizing biofilm to various sulfide dosages has never been investigated. In this study, the S0PB reactor was carried out with increasing sulfide dosages by 3.6 kg/m3/d, presenting a decreasing effluent nitrate from 14.2 to 2.7 mg N/L with accelerated denitrification efficiency (k: 0.04 to 0.27). However, 6.5 mg N/L of nitrite accumulated when the sulfide dosage exceeded 0.9 kg/m3/d (optimum value). The increasing electron export contribution of sulfide a maximum of 85.5% illustrated its competition with the in-situ sulfur. Meanwhile, over-dosing sulfide caused serious biofilm expulsion with significant decreases in the total biomass, live cell population, and ATP by 90.2%, 86.7%, and 54.8%, respectively. This study verified the capacity of dosing sulfide to improve the denitrification efficiency in S0PB but alerted the negative effect of exceeded dosing.
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Texte intégral: 1 Collection: 01-internacional Base de données: MEDLINE Sujet principal: Bioréacteurs / Dénitrification Langue: En Journal: Environ Res Année: 2023 Type de document: Article Pays de publication: Pays-Bas

Texte intégral: 1 Collection: 01-internacional Base de données: MEDLINE Sujet principal: Bioréacteurs / Dénitrification Langue: En Journal: Environ Res Année: 2023 Type de document: Article Pays de publication: Pays-Bas