Pilot studies on reducing energy consumption of submerged membrane bioreactor

Meng Jie Wang, Chun Hai Wei, Xia Huang*, Xiang Hua Wen, Jian Xin Zhang, Xi Long Cui

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A pilot-scale submerged membrane bioreactor with treating capacity of 15.6 m 3/d was developed on the basis of its structural optimization design according to the principle of air-lift internal-loop reactor. Economical aeration intensity of this installation was 96 m 3/(m 2·h) according to hydrodynamic investigation. Through critical flux test under the condition of economical aeration intensity, critical flux region of the membrane was 30-35 L/( m 2·h) when the sludge concentration was less than 13 g/L. Therefore the operation parameters of continuous motion of the pilot installation was determined and under the condition of sub-critical flux of 30 L/( m 2·h stable motion of sewage treatment was realized. Energy consumption analysis indicated that the air-to-water ratio of the pilot reactor was 21:1 and the effective unit energy consumption was 0.42 kW·h/m 3.

Original languageEnglish (US)
Pages (from-to)297-301
Number of pages5
JournalZhongguo Huanjing Kexue/China Environmental Science
Volume25
Issue number3
StatePublished - Jun 2005
Externally publishedYes

Keywords

  • Air-lift internal-loop reactor
  • Economical aeration intensity
  • Energy consumption
  • Sub-critical flux
  • Submerged membrane bioreactor

ASJC Scopus subject areas

  • Environmental Engineering

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