处理垃圾渗滤液的纳滤膜元件损坏诊断及修复  

Damage Diagnosis and Repair of Nanofiltration Membrane Element Treating Leachate

作　　者：田黎黎 蔡斌 周俊 高新 欧阳鹏 TIAN Li-li;CAI Bin;ZHOU Jun;GAO Xin;OUYANG Peng(Hunan Junxin Environmental Protection Co.Ltd.,Changsha 410007,China)

机构地区：[1]湖南军信环保股份有限公司,湖南长沙410007

出　　处：《中国给水排水》2018年第21期104-107,共4页China Water & Wastewater

摘　　要：长沙市固体废弃物处理场的渗滤液处理分厂出现了纳滤膜压力上涨快、膜两端压差高、化学清洗频繁等生产难题,通过外观检测、有机物截留率检测和探针测试,发现该膜进水端第一节膜元件质量增加了6. 67%,对有机物的截留率为87. 03%,清液出水偏黄。取污染物检测分析,发现是微生物滋生所产生的生物黏泥,表明该厂膜元件存在严重的微生物污染和一定程度的不可逆氧化损坏。通过投加非氧化性杀菌剂,有效抑制了微生物的繁殖,同时经聚酰亚胺修复剂对纳滤膜进一步修复后,该膜对有机物的截留率提高到了92. 73%,出水清澈。The nanofihration membrane integrated unit in the leachate treatment of the solid waste treatment plant in Changsha City has experienced production problems such as fast increasing pressure, high pressure difference across the membrane, and frequent chemical cleaning. Visual examinations, organic matter retention test, and probe test were implemented. The results showed that the weight of the first membrane element increased by 6.67% , the rejection rate of organic matter was 87.03% , and the effluent was yellowish. Analysis of the pollutant revealed that the pollutant was biological slime produced by the microorganism. The results showed serious microbial contaminations and a certain degree of irreversible oxidative damage. Dosing nonoxidative fungicides effectively inhibited the propagation of bacteria. Meanwhile, the nanofihration membrane was repaired with a potyimide repair agent. The retention rate increased to 92.73% , and the effluent was clear.

关 键 词：纳滤膜 垃圾渗滤液 微生物污染 物理损坏 氧化损坏 

分 类 号：TU993.3[建筑科学—市政工程]