Landfill leachate treatment system and process

Abstract

The invention discloses a landfill leachate treatment system and process. The landfill leachate treatment system comprises a plurality of treatment units which are sequentially arranged, wherein the treatment units comprise an adjusting tank, a denitrification system, a nitrification system, an ultrafiltration system, a first iron-carbon oxidation catalysis system, a first coagulative precipitation tank, a second iron-carbon oxidation catalysis system, a second coagulative precipitation tank and a filter tank, a leachate inlet is formed in the adjusting tank, and the water inlet of any treatment unit excluding the adjusting tank is communicated with the water outlet of the previous treatment unit. The landfill leachate treatment process is realized through the system. The landfill leachatetreatment system disclosed by the invention has the advantages of high treatment efficiency, stable and up-to-standard effluent quality, relatively low energy consumption and low investment and operation cost. The landfill leachate treatment process disclosed by the invention has the advantages of simple flow, low final effluent quality parameter content, no generation of a concentrated solutionand good leachate treatment effect.

Description

Technical field [0001] The invention relates to the field of sewage treatment, in particular to a landfill leachate treatment system and a landfill leachate treatment process. Background technique [0002] With the improvement of per capita life, the amount of garbage produced is increasing. The landfill leachate covers the influence of the water attached to the garbage and the climatic conditions, resulting in relatively large fluctuations in the amount of leachate produced. In the closed landfill, the water quality parameters of the landfill leachate are constantly changing due to the long-term infiltration, and the biochemical performance is seriously unbalanced, which leads to the continuous adjustment of the carbon to nitrogen ratio in the conventional biochemical operation to meet the normal operation. Long-term operation will seriously restrict Operation of landfill leachate. [0003] According to the characteristics of landfill leachate, there are tens of thousands of orga...

AI Technical Summary

Problems solved by technology

[0005] (1) The process is complicated and the treatment efficiency is slow. The concentrate and filtrate after nanofiltration need to be treated separately. The operation process is relatively cumbersome, and the separation efficiency of nanofiltration and subsequent reverse osmosis and other denitrification treatments is relatively slow, and the concentrate treatment equipment is corroded and damaged. other issues that reduce the overall leachate treatment efficiency;

[0006] (2) The cost is high. The installation and operation costs of denitrification treatment devices such as nanofiltration and reverse osmosis are relatively high. The concentrated solution needs to be treated at high cost separately, and the further treatment of the concentrated solution also increases the floor area and installation cost of the device.

Images