沙河市生活垃圾填埋场渗滤液处理工艺设计及运行调试

发布时间：2018-03-16 10:43

本文选题：垃圾渗滤液　切入点：工程设计　出处：《河北科技大学》2016年硕士论文　论文类型：学位论文

【摘要】：垃圾渗滤液是一种典型的高浓度难降解有机污染废水,其水质特点表现为水质复杂、危害性大,COD、BOD、氨氮浓度高,水质变化大,如不妥善处理,会对周围环境及地下水造成严重污染。本文结合了沙河市生活垃圾填埋场渗滤液处理工程设计,总结了国内外垃圾渗滤液处理技术及其现状,结合沙河市生活垃圾填埋场渗滤液水质特点以及处理技术的可操作性和经济性的要求,确定采用“膜生物反应器(MBR)+纳滤(NF)+反渗透(RO)”组合处理工艺。本工程设计处理规模为50m~3·d-1,介绍了垃圾卫生填埋场渗滤液处理工程设计中的几个技术问题,主要对生活垃圾卫生填埋场渗滤液收集、处理系统进行了设计,进一步设计了“MBR+NF+RO”处理工艺流程图,并对预测结果进行了分析,其设计出水水质达到了《生活垃圾填埋场污染控制标准》(GB16889-2008)中的一级排放标准,并对工程造价进行了合理分析,以降低经济投资,获得良好的环境效益。调试运行结果表明:MBR系统对COD去除率均能保持在85%以上,氨氮去除率在92%以上;NF系统对COD去除率在90%以上,出水COD浓度稳定在150mg·L~(-1)以下;RO系统进一步降低了COD浓度,使出水稳定保持在50mg·L~(-1)以下,做到了达标排放;NF系统对氨氮的去除率约为30%,进出水NH~3-N的含量变化在8mg·L~(-1)左右,因此可知NF系统对NH~3-N无显著截留作用;RO系统对NH~3-N的去除效果相对显著,出水NH~3-N的含量在5mg·L~(-1)左右。
[Abstract]:Landfill leachate is a typical high concentration refractory organic wastewater. Its water quality is characterized by complex water quality, great harmfulness, high concentration of ammonia nitrogen and great changes in water quality, such as improper treatment. This paper combines the leachate treatment project design of Shahe Municipal solid waste Landfill site, summarizes the domestic and foreign landfill leachate treatment technology and its present situation. Combined with the characteristics of leachate quality and the operational and economic requirements of treatment technology in Shahe municipal solid waste landfill, The combined treatment process of "membrane bioreactor (MBR) nanofiltration (NFN) reverse osmosis (ROA)" is determined. The design scale of the project is 50mm3 路d ~ (-1). Several technical problems in the design of landfill leachate treatment project are introduced. The leachate collection and treatment system of sanitary landfill was designed, and the flow chart of "MBR NF RO" treatment process was further designed, and the predicted results were analyzed. The designed effluent quality has reached the first class discharge standard of National refuse Landfill pollution Control Standard (GB16889-2008), and the project cost has been reasonably analyzed in order to reduce economic investment. The results of debugging and running show that the removal rate of COD is above 85%, and the removal rate of ammonia nitrogen is more than 92%. The removal rate of COD by NF system is more than 90%. The effluent COD concentration was stable at 150mg 路L ~ (-1)) and the COD concentration was further reduced by the RO system. The effluent water was kept below 50mg 路L ~ (-1). The removal rate of ammonia nitrogen was about 30mg 路L ~ (-1) by the NF system, and the content of NH~3-N in the effluent changed from 8 mg 路L ~ (-1) to 8 mg 路L ~ (-1). It is concluded that NF system has no significant interception of NH~3-N and RO system has a relatively significant removal effect on NH~3-N, and the content of NH~3-N in effluent is about 5 mg 路L ~ (-1).
【学位授予单位】：河北科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：X799.3

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