A combined process for landfill leachate treatment

Abstract

The invention provides a landfill leachate processing process. Landfill leachate sequentially passes through a pretreatment system, a main body biological treatment system and a deep treatment system; the pretreatment system consists of a regulating pool, an adsorption pool and a coagulating pool; wastewater is pretreated sequentially through the devices; outlet water enters the main body biological treatment system; the main body biological treatment system comprises an anaerobic EGSB (expanded granular sludge bed) reactor, an A / O short-range nitratlon reaction pool and an anaerobic ammonia oxidation UASB (upflow anaerobic sludge blanket) reactor; the treatment devices perform real-time regulation control through a PLC (programmable logic controller) control system for denitrification decarbonization reaction; the outlet water enters the deep treatment system for further treatment; the deep treatment system comprises a secondary coagulating pool, a primary homogeneous catalysis ozone oxidation reaction pool, a MBR (meane biological reactor) secondary biological reaction pool and a secondary homogeneous catalysis ozone oxidation reaction pool; finally, organic matters, total nitrogen and ammonia nitrogen of the outlet water reach the discharge standard. The landfill leachate processing process has the advantages that efficient denitrification and carbon removal are realized; the energy is saved; the consumption is reduced; the operation is stable; meanwhile, the goal of zero concentrated liquid generation is realized.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a combined process for treating landfill leachate. Background technique [0002] The landfill leachate produced by urban waste sanitary landfill contains a large amount of organic pollutants, nitrogenous substances and various heavy metal substances. If it is not handled properly, it will become a huge threat to the surrounding environment. Especially the ammonia nitrogen contained in it is the key factor of leachate stabilization treatment; and too high concentration of ammonia nitrogen will inhibit the normal growth of microorganisms and the effect of biochemical treatment. The "Discharge Standard for Landfill Leachate" (GB16889-2008) promulgated by the state has added the standard for total nitrogen discharge, requiring the mass concentration of total nitrogen in the effluent to be less than 40 mg / L. So far, it is still one of the major areas in landfill leach...

AI Technical Summary

Problems solved by technology

Ozone strong oxidation advanced treatment technology can realize the purpose of "zero concentrate" of landfill leachate, and completely solve the problem of difficult disposal and high disposal cost of concentrate in traditional processes

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