MA Jian-ye,RONG Hong-wei,WANG Jing-yin,et al.Microbial Community Composition and Membrane Fouling Performance of Anaerobic Ammonia Oxidation Membrane Bioreactor[J].China Water & Wastewater,2021,37(9 9):7-14.
Microbial Community Composition and Membrane Fouling Performance of Anaerobic Ammonia Oxidation Membrane Bioreactor
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第37卷
Number:
9 9
Page:
7-14
Column:
Date of publication:
2021-05-01
- Keywords:
- anaerobic ammonia oxidation (Anammox); planktonic state; nitrogen removal; membrane fouling; microbial community composition
- Abstract:
- Anammox bacteria were cultured in an immersed anaerobic ammonia oxidation membrane bioreactor (Amx IMBR). When NH4+-N and NO2--N in the influent were both 450 mg/L and nitrogen loading rate was 0.6 kg/(m3·d),the removal rates of TN, NH4+-N and NO2--N stably reached 86%, above 90% and 97%, respectively. In addition, the ratio of ΔNH4+-N, ΔNO2--N and ΔNO3--N was basically 1 ∶1 ∶0.18. Critical flux of the Amx IMBR was 8.63 L/(m2·h),which was consistent with the long-term operational results. Tightly bound extracellular polymeric substances were the key factors to membrane fouling, in which the content of protein and polysaccharide were 2.42 g/m2 and 0.84 g/m2, respectively. During the operation, morphology of the Anammox bacteria changed from red granular sludge to planktonic sludge, which was one of the most significant characteristics of the Amx IMBR. High-throughput sequencing results indicated that the dominant microbial species of the Amx IMBR were Bacteroidetes (47.83%), Planctomycetes (21.2%) and Proteobacteria (18.85%). Among them, the dominant Anammox functional bacterium was Candidatus Kuenenia with relative abundance of 17.08%.
Last Update:
2021-05-01