Simultaneous reduction of perchlorate and nitrate in a combined heterotrophic-sulfur-autotrophic system: Secondary pollution control, pH balance and microbial community analysis.

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ID: 26993
2019
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Abstract
A combined heterotrophic-sulfur-autotrophic system (CHSAS) was established to simultaneously reduce perchlorate and nitrate in water. In this system, the OH produced by the acetate heterotrophic part (H-part) could be neutralized with the H produced by the sulfur autotrophic part (S-part); thus, the pH of the final effluent could keep neutral. In addition, the S-part could further reduce the pollutants and residual carbon from the H-part to achieve a high performance. For 19.62 ± 0.30 mg/L ClO and 21.56 ± 0.83 mg/L NO-N in the influent, the operating parameters were optimal at a hydraulic retention time (HRT) of 1.0 h and an acetate concentration of 70 mg/L. The removal efficiency of ClO and NO reached 95.43% and 99.23%, without secondary pollution caused by residual organic carbon. It was also revealed that sulfur (S) disproportionation can be inhibited by shortening the HRT and reducing the acetate dosage. The dominant heterotrophic and autotrophic bacteria were Thauera and Ferritrophicum, respectively, while Chlorobaculum was related to S disproportionation.
Reference Key
wan2019simultaneouswater Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Wan, Dongjin;Li, Qi;Liu, Yongde;Xiao, Shuhu;Wang, Hongjie;
Journal Water research
Year 2019
DOI
S0043-1354(19)30778-X
URL
Keywords Keywords not found

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