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Updated: Jun 13, 2025
A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
Published on: December 25, 2015
Research on the application of heterotrophic nitrification-aerobic denitrification bacteria in membrane bioreactor
Tianrui Zhai1, Tiantao Zhao2, Yuhao Zhong1
1School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, China.
Abstract:
Inoculating heterotrophic nitrification-aerobic denitrification bacteria (HN-AD) to enhance membrane bioreactor (MBR) efficiency may result in the loss of functional bacteria. Therefore, this study compares the application results of enhancing MBR with a self-designed biological amplifier coupled with HN-AD against the performance of conventional MBR. After enhancement, the MBR achieved a removal efficiency of 96.7% for NH4+-N (100 mg/L) and 96.4% for COD (400 mg/L) in synthetic wastewater. There was a 33% increase in TN (100 mg/L) removal efficiency. The dominant bacteria in the MBR were Alcaligenes (48.4%) and Thauera (15.2%). Additionally, the abundance of denitrification genes (nirK, norB, nosZ) increased in the enhanced MBR, contributing to improved TN removal efficiency. The use of a biological amplifier effectively solved the problem of HN-AD loss in sewage treatment.
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