A fully quantitative treatment system and method for leachate from a domestic waste landfill

Abstract

The present invention discloses a fully quantitative treatment system and treatment method for leachate from a domestic waste landfill, the treatment system comprising a regulating 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 connected in sequence. The treatment method adopts a three-stage denitrification process with independent control of each stage of working conditions, and achieves standard discharge of total nitrogen through two-stage heterotrophic nitrification and denitrification and primary autotrophic denitrification. The present invention overcomes the shortcomings of imbalanced carbon-nitrogen ratio, low biodegradability, and difficulty in meeting the standard for total nitrogen in effluent from a domestic waste landfill, improves the denitrification efficiency of the heterotrophic denitrification process, and achieves the purpose of stably meeting the standard for total nitrogen and COD in effluent.

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