Efficient methanogenic degradation of alcohol ethoxylates and microbial community acclimation in treatment of municipal wastewater using a submerged anaerobic membrane bioreactor

Yulun Nie, Qigui Niu, Hiroyuki Kato, Toshiki Sugo, Xike Tian, Gyokuyu Ri

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The effect of alcohol ethoxylates on the treatment of municipal wastewater by a submerged anaerobic membrane bioreactor was investigated by a 400 days operation including the treatment efficiency, methanogenic activity of sludge and microbial community structure. The results indicated that alcohol ethoxylates (5.0–200 mg/L) was efficiently degraded and converted into methane due to the similar COD removal 95.5–98.8% and rising biogas production rate (2.30–4.25 L/d) compared with control (96.8% and 2.55 L/d). The microbes in sludge could copy with the presence of alcohol ethoxylates in wastewater by releasing more SMP and EPS, which caused a higher membrane fouling rate. Moreover, via long term acclimation, the specific methanogenic activity of sludge was greatly enhanced due to the changes of microbial community structure. Hence, the sludge self-acclimation to alcohol ethoxylates was responsible to the efficient methane recovery in treatment of municipal wastewater.

Original languageEnglish
Pages (from-to)181-190
Number of pages10
JournalBioresource Technology
Volume226
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Alcohol ethoxylates
  • Anaerobic membrane bioreactor
  • Microbial analysis
  • Municipal wastewater
  • Treatment

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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