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Author:

Zhang, Kai (Zhang, Kai.) | Li, Jun (Li, Jun.) | Zheng, Zhaoming (Zheng, Zhaoming.) | Zhang, Jing (Zhang, Jing.) | Sun, Mengxia (Sun, Mengxia.) | Huang, Shan (Huang, Shan.)

Indexed by:

Scopus SCIE

Abstract:

The implementation of anammox based process remains a challenge in treating low ammonium wastewater. In present research, partial nitrification/anammox (PN/A) performance was investigated in the integrated fixed-film activated sludge (IFAS) system. The influent of the IFAS reactor was simulated residential domestic sewage. The nitrite oxidizing bacteria (NOB)'s proliferation was observed when dissolved oxygen (DO) concentrations were 0.65 and 0.35 mg/L. By conducting intermittent aeration (aerobic 1 min/anoxic 5 min) and low DO condition (0.20 mg/L) strategy, the IFAS reactor performed good nitrogen removal performance. The average total nitrogen (TN) removing efficiency and TN removing rate reached 80.6% and 0.13 kg N/(m(3).d), respectively. In long term operation, extracellular polymeric substance (EPS) concentration of activated sludge was largely increased, which favored the formation of granules. The maximum frequency diameter of sludge flocs was increased to 1000 mu m. The anammox bacteria and ammonium oxidizing bacteria (AOB) were both enriched within activated sludge and biofilm. High throughput analyzing result implied that anammox bacteria and AOB's abundances were 2.01% and 5.04% in activated sludge, while 2.43% and 2.45% in biofilm, respectively.

Keyword:

Intermittent aeration Integrated fixed-film activated sludge system Extracellular polymeric substance Microbial community Partial nitrification/anammox

Author Community:

  • [ 1 ] [Zhang, Kai]Beijing Univ Technol, Natl Engn Lab Urban Sewage Adv Treatment & Resour, Beijing 100124, Peoples R China
  • [ 2 ] [Li, Jun]Beijing Univ Technol, Natl Engn Lab Urban Sewage Adv Treatment & Resour, Beijing 100124, Peoples R China
  • [ 3 ] [Zheng, Zhaoming]Beijing Univ Technol, Natl Engn Lab Urban Sewage Adv Treatment & Resour, Beijing 100124, Peoples R China
  • [ 4 ] [Zhang, Jing]Beijing Univ Technol, Natl Engn Lab Urban Sewage Adv Treatment & Resour, Beijing 100124, Peoples R China
  • [ 5 ] [Sun, Mengxia]Beijing Univ Technol, Natl Engn Lab Urban Sewage Adv Treatment & Resour, Beijing 100124, Peoples R China
  • [ 6 ] [Huang, Shan]Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA

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Source :

JOURNAL OF WATER PROCESS ENGINEERING

ISSN: 2214-7144

Year: 2022

Volume: 46

7 . 0

JCR@2022

7 . 0 0 0

JCR@2022

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count: 20

SCOPUS Cited Count: 21

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 7

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