Enhanced energy production and biological treatment of swine wastewater using anaerobic membrane bioreactor: Fouling mechanism and microbial community

Yunhui Pu, Jialing Tang, Ting Zeng, Yisong Hu, Qingyuan Wang, Jin Huang, Shengwang Pan, Xiaochang C. Wang, Yuyou Li, Huu Hao Ngo, Abdelfatah Abomohra

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This study aimed to reveal the membrane fouling mechanisms during anaerobic membrane bioreactor (AnMBR) operation for swine wastewater treatment under different organic loading rates (OLR). Results showed that AnMBR could achieve high pollutant removal (71.9–83.6 %) and energy recovery (0.18–0.23 L-CH4/g-COD) at an OLR range of 0.25–0.5 g-COD/g-VSS.d, realizing energy production. However, higher OLR would aggravate the membrane fouling due to accumulation of fine sludge particles, organic foulants, and extracellular polymeric substances (EPS) on cake layer. Based on the high-throughput sequencing, microbial communities significantly changed and fouling-causing bacteria (e.g. Pseudomonas, Methanosarcina and Methanothrix) enriched in the cake layer at higher OLR conditions, leading to lower membrane permeability. Backwash can effectively remove the cake layer from the membrane surface and recover membrane permeability. The present study provides important information about membrane fouling and microbial information that could have significant impact on large-scale AnMBR application.

Original languageEnglish
Article number127850
JournalBioresource Technology
Volume362
DOIs
Publication statusPublished - 2022 Oct

Keywords

  • Biogas
  • Extracellular polymeric substances (EPS)
  • Green energy
  • Methane
  • Waste management

ASJC Scopus subject areas

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

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