Processing method of landfill leachate

Abstract

The invention discloses a processing method of landfill leachate. The processing method comprises following steps: the landfill leachate is mixed with lime for sedimentation processing so as to obtain a sedimentation liquid containing solid slag; the sedimentation liquid containing solid slag is subjected to first filtration processing so as to obtain the solid slag and a first filtrate; the first filtrate is subjected to first absorption processing using anion exchange resin so as to obtain a first after absorption liquid and adsorption saturated anion exchange resin; the first after absorption liquid is subjected to air stripping so as to obtain an after air stripping liquid; the after air stripping liquid is subjected to second absorption processing using active carbon so as to obtain a second after absorption liquid; and the second after absorption liquid is subjected to second filtration processing so as to obtain an after purified liquid and active carbon slag. According to the processing method, the landfill leachate is processed via combination of chemical treatment methods and physical treatment methods, cost is low, effect is obvious, decoloration and deodorization can be realized effectively, heavy metal ions and ammonia nitrogen are removed effectively, and COD index is reduced greatly.

Description

technical field

[0001] The invention belongs to the field of waste water and sewage treatment, in particular, the invention relates to a treatment method for landfill leachate. Background technique

[0002] In recent years, my country's economy has developed rapidly, the scale of industrial and agricultural production has continued to expand, and people's living standards have continued to improve. However, behind the development, environmental problems are becoming more and more prominent. With the economic growth and the rapid expansion of the population, more and more garbage is produced, and the municipal solid waste is increasing at an annual growth rate of about 8%, causing serious pollution to the environment. At present, domestic and foreign municipal solid wastes are mainly treated by landfill, incineration, composting and comprehensive utilization. Among them, the sanitary landfill method has the advantages of lower processing costs, relatively mature technology,...

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