平板膜在生活垃圾焚烧厂渗滤液处理系统中的应用  

Application of Flat Sheet Membrane in Leachate Treatment System of Domestic Waste Incineration Plant

作　　者：吴靖宇 张爱军 戴小东 葛亚军 WU Jing-yu;ZHANG Ai-jun;DAI Xiao-dong;GE Ya-jun(Beijing Capital Envirormental Techrology Co.Ltd.,Beijing 100028,China)

机构地区：[1]北京首创环境科技有限公司,北京100028

出　　处：《中国给水排水》2020年第16期126-131,共6页China Water & Wastewater

摘　　要：MBR是生活垃圾焚烧发电厂渗滤液的常规处理工艺,但较少采用平板膜。主要介绍了平板膜系统在垃圾渗滤液处理工程实践中的设计参数和运行情况。近1年的实际运行结果表明,平板膜在高有机负荷、高污泥浓度、高碱度MBR系统中可以稳定运行,出水水质达到设计要求。但是由于高碱度和高硬度离子的影响,导致膜表面存在结垢现象,膜通量下降,产水量减少,需要频繁化学清洗。现场试验通过改变运行工况,调整前端进水碳氮比,将生化进水碳氮比调整至4∶1,以及投加酸性溶液,逐步降低生化池内pH值至7.5以下,结果表明,此项措施可减缓平板膜表面结垢进程,使得清洗频率恢复正常。MBR technology is commonly used to treat leachate in domestic waste incineration power plants,however,the flat sheet membrane is seldom used.The design parameters and operation conditions of flat sheet membrane system in the engineering practice of leachate treatment process was described.The actual operation results in the past year showed that the flat membrane could be operated stably in the MBR system under high organic load,high sludge concentration and high alkalinity conditions,and the effluent quality met the design requirements.However,due to the influence of high alkalinity and hardness ions,there was scaling on the membrane surface,resulting in the decrease of membrane flux and the decrease of water production,which required frequent chemical cleaning.Via adjusting the influent ratio of carbon to nitrogen to 4∶1 and adding acid solution,the pH in the biochemical tank could be gradually reduced to below 7.5.The result showed that the fouling process on the surface of the flat membrane could be slowed down,and the cleaning frequency could return to normal.

关 键 词：生活垃圾渗滤液 平板膜 MBR 膜污染 化学清洗 碳氮比 碱度 

分 类 号：TU993[建筑科学—市政工程]