Effect of anionic surfactant inhibition on sewage treatment by a submerged anaerobic membrane bioreactor: Efficiency, sludge activity and methane recovery

Yulun Nie, Hiroyuki Kato, Toshiki Sugo, Toshimasa Hojo, Xike Tian, Yu You Li

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

The effect of linear alkylbenzene sulfonate (LAS), a typical anionic surfactant, on the sewage treatment by a submerged anaerobic membrane bioreactor (SAnMBR) was investigated by a 243 days operation. The changes of treatment efficiency, methane recovery and sludge activity due to the presence of LAS in sewage was studied in detail. Compared with control (96.8% and 2.87 L/d), lower COD removal (95.2%) and biogas production rate (2.11 L/d) were found at a LAS dosage of 5 mg/L. Besides, LAS was removed by adsorption rather than degradation on the sludge (30–70%). Its adsorption can lead to significant loads in sewage sludge, which then decrease the methane production activity. The recovery efficiency of potential bioenergy was decreased by 20% and 26% at LAS of 2.5 mg/L and 5.0 mg/L, respectively. The results indicated that LAS had a more negative effect on the acetoclastic methanogens than acidogenic microbiota and the LAS inhibition to methanogen activity was responsible for the decrease of SAnMBR performance. Moreover, LAS caused a higher membrane fouling rate than the control experiment due to the microbial self-protection behavior in coping with the LAS in sewage. SAnMBR was hence not suitable to dispose LAS containing sewage with higher concentration.

Original languageEnglish
Pages (from-to)83-91
Number of pages9
JournalChemical Engineering Journal
Volume315
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • Influence mechanism
  • LAS
  • Performance
  • SAnMBR
  • Sewage

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Effect of anionic surfactant inhibition on sewage treatment by a submerged anaerobic membrane bioreactor: Efficiency, sludge activity and methane recovery'. Together they form a unique fingerprint.

Cite this