School of Chemistry and Chemical Engineering, Chongqing University of Technology, Chongqing, 400054, China.
School of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, 400054, China.
Biotechnol Lett. 2024 Dec;46(6):1013-1025. doi: 10.1007/s10529-024-03529-5. Epub 2024 Sep 11.
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 NH-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.
接种异养硝化-好氧反硝化菌（HN-AD）以提高膜生物反应器（MBR）效率可能导致功能菌的损失。因此，本研究比较了通过自行设计的生物增效器与 HN-AD 增强 MBR 的应用效果与传统 MBR 的性能。增强后，MBR 对合成废水中的 NH-N（100mg/L）和 COD（400mg/L）的去除效率达到了 96.7%和 96.4%，TN（100mg/L）的去除效率提高了 33%。MBR 中的优势菌为产碱杆菌（48.4%）和陶厄氏菌（15.2%）。此外，增强型 MBR 中脱氮基因（nirK、norB、nosZ）的丰度增加，有助于提高 TN 的去除效率。生物增效器的使用有效解决了污水处理中 HN-AD 损失的问题。
