Zheng Lei, Ren Mengli, Xie En, Ding Aizhong, Liu Yan, Deng Songqiang, Zhang Dayi
College of Water Science, Beijing Normal University, Beijing, China.
College of Water Resources and Civil Engineering, China Agricultural University, Beijing, China.
Front Microbiol. 2019 May 16;10:1023. doi: 10.3389/fmicb.2019.01023. eCollection 2019.
Various phosphorus sources are utilized by microbes in WWTPs, eventually affecting microbial assembly and functions. This study identified the effects of phosphorus source on microbial communities and functions in the activated sludge. By cultivation with 59 phosphorus sources, including inorganic phosphates (IP), nucleoside-monophosphates (NMP), cyclic-nucleoside-monophosphates (cNMP), and other organophosphates (OP), we evaluated the change in removal efficiencies of total organic carbon (TOC) and ammonia, microbial biomass, alkaline phosphatase (AKP) activity, microbial community structure, and AKP-associated genes. TOC and ammonia removal efficiency was highest in IP (64.8%) and cNMP (52.3%) treatments. Microbial community structure changed significantly across phosphorus sources that IP and cNMP encouraged and , respectively. The abundance of and genes was higher in IP treatments, whereas and genes dominated OP treatments. Our findings suggested that the performance of WWTPs was dependent on phosphorus sources and provided new insights into effective WWTP management.
污水处理厂中的微生物会利用各种磷源，最终影响微生物的群落结构和功能。本研究确定了磷源对活性污泥中微生物群落和功能的影响。通过使用59种磷源进行培养，包括无机磷酸盐（IP）、单磷酸核苷（NMP）、环单磷酸核苷（cNMP）和其他有机磷酸盐（OP），我们评估了总有机碳（TOC）和氨的去除效率、微生物生物量、碱性磷酸酶（AKP）活性、微生物群落结构以及与AKP相关基因的变化。在IP（64.8%）和cNMP（52.3%）处理中，TOC和氨的去除效率最高。微生物群落结构在不同磷源之间发生了显著变化，IP和cNMP分别促进了 和 。IP处理中 和 基因的丰度较高，而OP处理中 和 基因占主导地位。我们的研究结果表明，污水处理厂的性能取决于磷源，并为有效的污水处理厂管理提供了新的见解。
