The Application Study On Treatment Technology Of Domestic Waste Leachate

At present, the majority of domestic garbage landfill leachate treatment failed to achieve the desired effect, So the study on treatment of landfill leachate is always a focus and difficulty in the field of landfill pollution control.Purpose: By means of relatively systemic commissioning and application study, this paper aims to provide a basis for stable and reliable performance of the landfill leachate treatment, and for the optimization of different treatment craft combinations as well, combined with the research tasks and certain practical projects.Methods: Onsite commissioning; Sampling and testing; Expense benefit analysis.Content: On the basis of analyzing the characteristics of leachate and various leachate treatment technologies, this paper makes detailed comparative study on diverse pre-treatment denitriding process, principal treatment process and advanced treatment unit. Meanwhile, it chooses manifold leachate processing facility of sewage treatment station belonged to Zhengzhou integrated waste treatment plant as researching platform for practical operation. What's more, this paper carries out an expense benefit analysis considering some aspects such as result of treating, cost of investment, operation management, and environmental influence and so on. In the end, it puts forward integrated treatment technic which is suitable for different water dynamics changes and various discharge requirements and selects a comprehensive leachate treatment process adapted to Zhengzhou landfill.Conclusions: (1) Considering with the treatment effect of different stages and the anti-load capacity during long-term operation, integrated Landfill leachate treatment is preferable. The characteristics of this integrated treatment are concluded as follows: short-range nitrification and denitrification treatment is used at early stage, then, utilize membrane bioreactor as the main treatment process to achieve standard of Classâ…¡orâ…¢, finally select physico chemical treatment technique, ultimately, its effluent could meet the national discharge standard of Classâ… . (2) By means of commissioning and expense benefit analysis; this paper believes that the utilization of integrated A/A/O+MBR+Hyperfiltration+NF technics is feasible in sewage treatment station of Zhengzhou landfill.