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Author:

Wang, S. (Wang, S..) | Zhu, R. (Zhu, R..) | Wang, K. (Wang, K..) | Miao, L. (Miao, L..)

Indexed by:

Scopus CSCD

Abstract:

In order to analyze the nitrogen removal performance of anaerobic-aerobic process treating landfill leachate, a system combining ASBR with pulsed SBR was applied to treat real landfill leachate with high concentration of ammonia nitrogen. The HRT of ASBR was 2 d; middle water tank regulated the COD/NH4+-N (3~5) and NH4+-N concentration of pulsed SBR's influent; the cycle of pulsed SBR consisted of four anoxic stages and three oxic stages in which three equal feeds model was applied. In the fourth anoxic stage (An4), internal carbon source was used to implement denitrification without any extra carbon source addition. The results indicate that efficient nitrogen removal performance of this system was achieved in the series running period (157 d). Influent chemical oxygen demand (COD) concentration of ASBR was from 7338 mg·L-1 to 10445 mg·L-1 of which above 83% was removed; pulsed SBR's influent NH4+-N concentration could be divided into four phases in which improving from 296.1 ± 14.5 mg·L-1 to 912.0 ± 41.7 mg·L-1, and the effluent total nitrogen (TN) concentration of pulsed SBR was below 40 mg·L-1 all the time, which means TN removal rate reached over 90%. To sum up, the COD and TN removal rate of the combined system were above 87% and 97%, respectively. Endogenous denitrification rate (DNR) of An4 changed from the fast one to the slow one, and the mean value of theoretical denitrification rate (TDNRm) of pulsed SBR's An4 could reach 1.531 mg N·h-1·gMLVSS-1. Advanced nitrogen removal of the system was realized without extra carbon source addition and physicochemical pre-treatment.

Keyword:

ASBR; Endogenous denitrification; Landfill leachate; Pulsed SBR

Author Community:

  • [ 1 ] [Wang, S.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
  • [ 2 ] [Zhu, R.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
  • [ 3 ] [Wang, K.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
  • [ 4 ] [Miao, L.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China

Reprint Author's Address:

  • [Wang, S.]Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China

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Source :

Journal of Civil, Architectural and Environmental Engineering

ISSN: 1674-4764

Year: 2013

Issue: 1

Volume: 35

Page: 121-127

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 5

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