水力停留时间对用于去除城市废水中微污染物的混合移动床生物膜反应器-膜生物反应器系统性能的影响。
Effect of hydraulic retention time on the performance of a hybrid moving bed biofilm reactor-membrane bioreactor system for micropollutants removal from municipal wastewater.
机构信息
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, Sydney, NSW 2007, Australia.
Strategic Water Infrastructure Laboratory, School of Civil, Mining and Environmental Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.
出版信息
Bioresour Technol. 2018 Jan;247:1228-1232. doi: 10.1016/j.biortech.2017.09.114. Epub 2017 Sep 20.
This study evaluated micropollutants removal and membrane fouling behaviour of a hybrid moving bed biofilm reactor-membrane bioreactor (MBBR-MBR) system at four different hydraulic retention times (HRTs) (24, 18, 12 and 6h). The results revealed that HRT of 18h was the optimal condition regarding the removal of most selected micropollutants. As the primary removal mechanism in the hybrid system was biodegradation, the attached growth pattern was desirable for enriching slow growing bacteria and developing a diversity of biocoenosis. Thus, the efficient removal of micropollutants was obtained. In terms of membrane fouling propensity analysis, a longer HRT (e.g. HRTs of 24 and 18h) could significantly mitigate membrane fouling when compared with the shortest HRT of 6h. Hence, enhanced system performance could be achieved when the MBBR-MBR system was operated at HRT of 18h.
本研究评估了四种不同水力停留时间（HRT）（24、18、12 和 6 小时）下混合移动床生物膜反应器-膜生物反应器（MBBR-MBR）系统对微污染物去除和膜污染行为的影响。结果表明，18 小时的 HRT 是去除大多数选定微污染物的最佳条件。由于混合系统中的主要去除机制是生物降解，附着生长模式有利于富集生长缓慢的细菌并发展生物群落的多样性。因此，可以有效地去除微污染物。就膜污染倾向分析而言，与最短的 HRT（例如 6 小时的 HRT）相比，较长的 HRT（例如 24 和 18 小时的 HRT）可以显著减轻膜污染。因此，当 MBBR-MBR 系统以 18 小时的 HRT 运行时，可以实现增强的系统性能。
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