摘要
为实现光合细菌-膜生物反应器(PSB-MBR)的工业化规模应用,利用PSB-MBR在模拟工业通量运行条件下处理啤酒废水,考察了运行通量、PSB浓度、进水COD、温度等运行参数对PSB-MBR运行过程中的膜污染影响。结果表明,较高的运行通量、微生物浓度、进水COD,较低的运行温度均会增加膜阻力、加大膜污染,其中进水COD是最重要的影响因素。模拟工业通量运行时,PSB-MBR会产生较严重的膜污染,大量污染物会覆盖膜的原有结构,其中主要污染物是PSB菌体及其代谢产物带来的有机污染。在17.4 L·(m^(2)·h)^(−1)的工业通量下,PSB-MBR可持续运行,在物理清洗(5 min水洗)无法满足系统运行要求时,使用0.75%NaClO溶液浸泡2 h进行化学清洗能100%恢复膜通量。在模拟工业通量下,PSB-MBR系统的膜污染程度比常规MBR低,但比已有研究的低通量PSB-MBR高。本研究结果可为PSB-MBR的工业化应用提供参考。
In order to realize the industrial scale application of photosynthetic bacteria-membrane bioreactor(PSB-MBR),in this paper,PSB-MBR was used to treat beer wastewater under simulated industrial flux operating conditions,and the effects of operating parameters such as operating flux,PSB concentration,influent COD concentration,and temperature on membrane contamination in the PSB-MBR process were investigated.The results showed that high operating flux,PSB concentration,influent COD concentration,and low operating temperature would increase membrane resistance and membrane contamination,with influent COD concentration being the most important influencing factor.Compared to PSB-MBR operating at low flux,the PSB-MBR produces more serious membrane contamination at simulating industrial flux operation,with large number of contaminants covering the original structure of the membrane.The main contaminants were organic contamination from the PSB and its metabolites.At an industrial flux of 17.4 L·(m^(2)·h)^(−1),the PSB-MBR can be operated continuously.When physical cleaning(5 min water wash)cannot meet the system operation requirements,chemical cleaning with 0.75%NaClO solution for 2 h can restore 100%of the membrane flux.Operating at industrial flux,the membrane contamination of the PSB-MBR system was lower than that of conventional MBR and higher than that of the low flux PSB-MBR in existing studies.The results of this study can provide a reference for the industrial application of PSB-MBR.
作者
郑思佳
张光明
王爱杰
朱达
ZHENG Sijia;ZHANG Guangming;WANG Aijie;ZHU Da(School of Environment and Natural Resources,Renmin University of China,Beijing 100872,China;School of Energy&Environmental Engineering,Hebei University of Technology,Tianjin 300130,China;Key Laboratory of Environmental Biotechnology Chinese Academy of Science,Beijing 100085,China;Nantong JuyiChengguang Biological Technology Co.LTD,Nantong 226300,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第9期3079-3087,共9页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(52070067)
中国科学院环境生物技术重点实验室开放课题(kf2020013)
