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Author:

Ma, Bin (Ma, Bin.) | Wang, Shuying (Wang, Shuying.) (Scholars:王淑莹) | Zhu, Guibing (Zhu, Guibing.) | Ge, Shijian (Ge, Shijian.) | Wang, Junmin (Wang, Junmin.) | Ren, Nanqi (Ren, Nanqi.) | Peng, Yongzhen (Peng, Yongzhen.) (Scholars:彭永臻)

Indexed by:

Scopus SCIE CSCD

Abstract:

Denitrifying phosphorus accumulating organisms (DPAOs) using nitrite as an electron acceptor can reduce more energy. However, nitrite has been reported to have an inhibition on denitrifying phosphorus removal. In this study, the step-feed strategy was proposed to achieve low nitrite concentration, which can avoid or relieve nitrite inhibition. The results showed that denitrification rate, phosphorus uptake rate and the ratio of the phosphorus uptaken to nitrite denitrified (anoxic P/N ratio) increased when the nitrite concentration was 15 mg center dot L-1 after step-feeding nitrite. The maximum denitrification rate and phosphorus uptake rate was 12.73 mg NO (2) (-) -N center dot g MLSS-1 center dot h(-1) and 18.75 mg PO (4) (3-) -P center dot g MLSS-1 center dot h(-1), respectively. These rates were higher than that using nitrate (15 mg center dot(L-1)) as an electron acceptor. The maximum anoxic P/N ratio was 1.55 mg PO (4) (3-) P center dot mg NO (2) (-) -N-1. When the nitrite concentration increased from 15 to 20 mg NO (2) (-) -N center dot L-1 after addition of nitrite, the anoxic phosphorus uptake was inhibited by 64.85%, and the denitrification by DPAOs was inhibited by 61.25%. Denitrification rate by DPAOs decreased gradually when nitrite (about 20 mg center dot(L-1)) was added in the step-feed SBR. These results indicated that the step-feed strategy can be used to achieve denitrifying phosphorus removal using nitrite as an electron acceptor, and nitrite concentration should be maintained at low level (< 15 mg center dot(L-1) in this study).

Keyword:

denitrification step-feed nitrite enhanced biological phosphorus removal phosphorus uptake denitrifying phosphate accumulating organisms (DPAOs)

Author Community:

  • [ 1 ] [Ma, Bin]Harbin Inst Technol, State Key Lab Urban Water Resource & Environm HIT, Harbin 150090, Peoples R China
  • [ 2 ] [Ren, Nanqi]Harbin Inst Technol, State Key Lab Urban Water Resource & Environm HIT, Harbin 150090, Peoples R China
  • [ 3 ] [Peng, Yongzhen]Harbin Inst Technol, State Key Lab Urban Water Resource & Environm HIT, Harbin 150090, Peoples R China
  • [ 4 ] [Ma, Bin]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100022, Peoples R China
  • [ 5 ] [Wang, Shuying]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100022, Peoples R China
  • [ 6 ] [Ge, Shijian]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100022, Peoples R China
  • [ 7 ] [Wang, Junmin]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100022, Peoples R China
  • [ 8 ] [Peng, Yongzhen]Beijing Univ Technol, Key Lab Beijing Water Qual Sci & Water Environm R, Beijing 100022, Peoples R China
  • [ 9 ] [Zhu, Guibing]Chinese Acad Sci, State Key Lab Environm Aquat Qual, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China

Reprint Author's Address:

  • 彭永臻

    [Peng, Yongzhen]Harbin Inst Technol, State Key Lab Urban Water Resource & Environm HIT, Harbin 150090, Peoples R China

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Source :

FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING

ISSN: 2095-2201

Year: 2013

Issue: 2

Volume: 7

Page: 267-272

6 . 4 0 0

JCR@2022

ESI Discipline: ENVIRONMENT/ECOLOGY;

JCR Journal Grade:4

CAS Journal Grade:4

Cited Count:

WoS CC Cited Count: 12

SCOPUS Cited Count: 17

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 11

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