LIANGYi-fan,PANZeng-rui,YUSheng-hua,et al.Microbial Community of Sludge and Biofilm in a Moving Bed Biofilm Reactor[J].China Water & Wastewater,2023,39(23):15-22.
Microbial Community of Sludge and Biofilm in a Moving Bed Biofilm Reactor
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第23期
Page:
15-22
Column:
Date of publication:
2023-12-01
- Keywords:
- moving bed biofilm reactor (MBBR); sludge-biofilm system; microbial community; nitrogen and phosphorus removal
- Abstract:
- The activated sludge and the surface loosely?attached biofilm and the inner tightly-attached biofilm on the packing media from the biochemical tank of a wastewater treatment plant were sequenced by high throughput sequencing, so as to comprehensively analyze the microbial community composition of sludge and biofilm in a moving bed biofilm reactor (MBBR). There were significant differences among the dominant bacterial genera of the three samples. Among them, a large number of nitrifying bacteria and phosphorus removal bacteria were enriched in the activated sludge, which were mainly responsible for nitrification and phosphorus removal. The loosely-attached biofilm had a high abundance of functional bacteria related to antibiotic resistance, metal resistance and degradation of toxic pollutants. The surface loosely-attached biofilm was speculated to mainly play the role of intercepting and filtering pollutants and protecting the inner biofilm. The bacterial genera of the tightly-attached biofilm mainly included denitrifying bacteria, cellulolytic hydrolyzing bacteria and Anammox bacteria. The cooperation between activated sludge and biofilm with different thickness in the system enhanced the removal of nitrogen and phosphorus.
Last Update:
2023-12-01