SUNWei,TANGXia,WUXue-wei,et al.Abundance Difference of Phosphate Accumulating Organisms in Wastewater Treatment Plants in Central Area of Guangzhou and Its Influencing Factors[J].China Water & Wastewater,2022,38(17):81-87.
Abundance Difference of Phosphate Accumulating Organisms in Wastewater Treatment Plants in Central Area of Guangzhou and Its Influencing Factors
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第17期
Page:
81-87
Column:
Date of publication:
2022-09-01
- Keywords:
- anaerobic/anoxic/oxic (AAO) process; membrane bioreactor (MBR); abundance of PAOs; 16S rRNA gene amplicon sequencing; Candidatus Accumulibacter; Tetrasphaera
- Abstract:
- To investigate the difference in biological phosphorus removal efficiency and key influencing factors of wastewater treatment plants (WWTPs) using traditional anaerobic/anoxic/oxic (AAO) process and membrane bioreactor (MBR) process (typical process is anaerobic/anoxic/oxic/anoxic/membrane tank) in South China, the relative abundance of phosphate accumulating organisms (PAOs) Candidatus Accumulibacter and Tetrasphaera in activated sludge samples from 24 process lines of 13 WWTPs was detected by 16S rRNA gene amplicon sequencing technology. There was a significant difference in abundance of the two kinds of PAOs in the WWTPs using AAO and MBR processes, and the average relative abundance of Candidatus Accumulibacter in AAO process was 3 times of that in MBR process. Tetrasphaera was not detected in the WWTPs using MBR process. Canonical correlation analysis was performed to correlate the wastewater quality parameters, operational conditions, phosphorus removal performance, process configuration and microbial community of PAOs. In addition to the influent carbon to phosphorus ratio and the hydraulic retention time of anaerobic tank, the reflux mode of nitrification liquid was an important factor leading to the abundance difference of PAOs.
Last Update:
2022-09-01