Process Design and Application of Complete Treatment Project for Landfill Leachate in Northeast China
To solve the problem of C/N imbalance in leachate from elderly landfill sites and the difficulty in trea-ting concentrated solutions from Northeast China,the combined process of"pretreatment+MBR(two-stage A/O+tubular ultrafiltration)+two-stage NF",and"special separation membrane+Fenton+coagulation pre-cipitation"of the concentrated solution are used to the complete treatment of leachate from a landfill site in North-east China.The results showed that using this combination treatment process to treat leachate,the water produc-tion rate has reached 100％,and the removal rates of CODCr,NH3-N,TN,and SS reached 98.3％,99.2％,98.6％,and 99.8％,respectively.The effluent index is stable and meets the standards in table 2 of the Pollution Control on the Landfill Site of Municipal Solid Waste(GB16889-2008).After treatment,the concentrated nanofiltration so-lution is reintroduced into the biochemical system for further processing,ensuring the complete treatment of the concentrate without any external discharge.The system operates stably and has good environmental benefits,pro-viding a reference for similar wastewater treatment designs.
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维普
