ZHANGLi-li,GUOHong-feng,YANGuo-qi,et al.Pilot Study on Enhanced Biotechnology for Municipal Wastewater Treatment Based on Sludge-Biofilm Coupling[J].China Water & Wastewater,2025,41(11):104-109.
Pilot Study on Enhanced Biotechnology for Municipal Wastewater Treatment Based on Sludge-Biofilm Coupling
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第41卷
Number:
第11期
Page:
104-109
Column:
Date of publication:
2025-06-01
- Keywords:
- enhanced biotechnology based on sludge-biofilm coupling; municipal wastewater; nitrogen and phosphorus removal; microbial community
- Abstract:
- In response to the challenges of stringent effluent quality requirements and the lack of available land for upgrading wastewater treatment plants (WWTPs), three enhanced biological treatment processes based on sludge-biofilm coupling were selected for pilot-scale studies using actual municipal wastewater treatment scenarios. These processes included the biological reactor with Bacillus as the dominant bacteria (BBR process), the high-concentration composite powdered carrier biological fluidized bed (HPB process), and the moving bed biofilm reactor (MBBR process). The average total nitrogen (TN) in the effluent from the three processes was 39% to 57% lower compared to that in the effluent from secondary sedimentation tank of the WWTP. Additionally, the total phosphorus (TP) in the effluent without chemicals addition was comparable to that of the effluent from the WWTP with chemicals addition. After the acclimation of the three enhanced biological processes, the microbial diversity in the sludge was found to be lower than that in the activated sludge of the WWTP. At the phylum level, the enriched microbial communities were predominantly composed of Proteobacteria and Firmicutes. At the genus level, the average relative abundance of phosphate-accumulating bacteria and facultative anaerobic bacteria increased by 0.94% and 29.76%, respectively, compared to the activated sludge in the WWTP. These changes contributed to an enhanced nitrogen and phosphorus removal efficiency.
Last Update:
2025-06-01