Domestic waste landfill leachate full-quantification treatment system and treatment method

Abstract

The invention discloses a domestic waste landfill leachate full-quantitative treatment system and a treatment method. The treatment system comprises an adjusting tank, a primary A / O system, an intermediate sedimentation tank, a secondary A / O system, an MBR membrane system, a nanofiltration membrane system and a total nitrogen deep treatment device which are connected in sequence. According to the treatment method, a three-stage nitrogen removal process with each stage of working condition independently controlled is adopted, and the standard emission of total nitrogen is realized through two-stage heterotrophic nitrification and denitrification and one-stage autotrophic denitrification. According to the method, the defects that the carbon-nitrogen ratio of the percolate of the domestic waste landfill is unbalanced, the biodegradability is low, and the total nitrogen of the effluent is difficult to reach the standard are overcome, the denitrification efficiency of a heterotrophic denitrification process is improved, and the aim that the total nitrogen and COD of the effluent can stably reach the standard is achieved.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a system and method for fully quantifying the leachate of domestic waste landfills. Background technique [0002] With the construction and development of cities and towns in our country and the improvement of people's living standards, the output of urban domestic waste is increasing day by day. During the treatment of garbage, a large amount of high-concentration toxic and harmful landfill leachate will be produced. The leachate produced by landfill or incineration is rich in nitrogen and phosphorus elements. If active and effective measures are not taken to control it, it will be an important source of water pollution. According to the data collected so far, the leachate produced by landfill or incineration is almost synonymous with high-ammonia-nitrogen wastewater. Not only the content of ammonia-nitrogen is high, but also other components change...

AI Technical Summary

Problems solved by technology

According to the data collected so far, the leachate produced by landfill or incineration is almost synonymous with high-ammonia-nitrogen wastewater. Not only the content of ammonia-nitrogen is high, but also other components change complicatedly. Many problems will arise in the actual regulation and treatment, such as Imbalance, the lack or excess of certain trace elements (inhibiting the growth of microorganisms, poisoning effect), etc., make it difficult for the stable operation of landfill leachate and discharge up to standard

[0003] Garbage leachate is high ammonia nitrogen wastewater. The leachate of domestic waste landfill not only has high ammonia nitrogen, but also has a serious carbon-nitrogen ratio imbalance. How to ensure that the total nitrogen in the effluent is stable and up to the standard is a pain point and difficulty in the industry.

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