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Author:

Zhao, Guangze (Zhao, Guangze.) | Dai, Minghua (Dai, Minghua.) | Du, Qiangqiang (Du, Qiangqiang.) | Yang, Hong (Yang, Hong.) (Scholars:杨宏)

Indexed by:

EI Scopus SCIE

Abstract:

This study investigated the application of immobilized biological fillers in the hydrolytic acidification (HA) and denitrification (DN) of actual sulfide -containing tannery wastewater (TWW) through pilot -scale systematic experiments, which provided technical insights for the engineering application of immobilized bio-filler in practical TWW treatment. HA fillers and DN fillers could effectively realize the enrichment and maintenance of functional flora even under long-term inhibition of high sulfide concentration. The HA fillers demonstrated efficient conversion of organic nitrogen. At a hydraulic retention time (HRT) in the range of 3 - 6 h, the HA reactor achieved an average organic nitrogen conversion concentration of about 100 mg/L, accounting for 56.2 %-68.5 % of the total organic nitrogen in the TWW. Under this condition, the highest average organic nitrogen conversion and mean chemical oxygen demand (COD) degradation efficiencies were achieved, at 32.95 mgNH 4 + -N/(L & sdot; h) and 179.42 mgCOD/(L & sdot; h), respectively. Free ammonia (FA) may contribute to pH stabilization in the HA reactor. Denitrification fillers could utilize the endogenous organic matter in the actual TWW hydrolyzed acidified solution, and realize stable biological nitrogen removal effect with no additional carbon source. The denitrification rate reached 76.3 mg NO 3 - -N/(L & sdot; h) and the Delta C/ Delta N of the denitrification ranged from 3 to 4.

Keyword:

Hydrolytic acidification Immobilized biological filler Denitrification Sulfide -containing tannery wastewater

Author Community:

  • [ 1 ] [Zhao, Guangze]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm Re, Beijing 100124, Peoples R China
  • [ 2 ] [Yang, Hong]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm Re, Beijing 100124, Peoples R China
  • [ 3 ] [Dai, Minghua]Beijing Gen Municipal Engn Design & Res Inst Co Lt, Beijing 100044, Peoples R China
  • [ 4 ] [Du, Qiangqiang]Beijing Gen Municipal Engn Design & Res Inst Co Lt, Beijing 100044, Peoples R China
  • [ 5 ] [Yang, Hong]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China

Reprint Author's Address:

  • [Yang, Hong]Beijing Univ Technol, Fac Architecture Civil & Transportat Engn, Beijing 100124, Peoples R China;;

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Source :

BIOCHEMICAL ENGINEERING JOURNAL

ISSN: 1369-703X

Year: 2024

Volume: 208

3 . 9 0 0

JCR@2022

Cited Count:

WoS CC Cited Count: 3

SCOPUS Cited Count: 3

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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