Process stability and comparative rDNA/rRNA community analyses in an anaerobic membrane bioreactor with silicon carbide ceramic membrane applications

Sci Total Environ. 2019 May 20:666:155-164. doi: 10.1016/j.scitotenv.2019.02.166. Epub 2019 Feb 14.

Abstract

This study evaluated the feasibility of using a silicon carbide (SiC) anaerobic ceramic membrane bioreactor (AnCMBR) to co-manage domestic wastewater (DWW) and food waste recycling wastewater (FRW). A pilot-scale SiC-AnCMBR was put into operation for 140 days under two different organic loading rates (OLRs): 5 kg COD m-3 d-1 (OLR 5) and 3 kg COD m-3 d-1 (OLR 3). The organic removal efficiency was 93.5 ± 3.7% over the operational period. Methane production increased significantly after sludge re-seeding at OLR 3. rDNA and rRNA microbial results showed that the active archaeal community was affected by sludge re-seeding, whereas the active bacterial community was not, indicating that a shift in the active archaeal community was responsible for the increased methane production. Our results thus suggest that SiC-AnCMBRs are a promising option for co-managing DWW and FRW.

Keywords: Anaerobic ceramic membrane bioreactor; Domestic wastewater; Food waste recycling wastewater; Silicon carbide membrane; rDNA sequencing; rRNA sequencing.

Publication types

  • Comparative Study

MeSH terms

  • Anaerobiosis
  • Bioreactors / microbiology*
  • Carbon Compounds, Inorganic / chemistry*
  • Ceramics
  • DNA, Ribosomal / analysis*
  • Membranes, Artificial
  • Microbiota*
  • RNA, Ribosomal / analysis*
  • Silicon Compounds / chemistry*
  • Waste Disposal, Fluid / methods*

Substances

  • Carbon Compounds, Inorganic
  • DNA, Ribosomal
  • Membranes, Artificial
  • RNA, Ribosomal
  • Silicon Compounds
  • silicon carbide