Deep treatment process of landfill leachate

Abstract

The invention relates to a deep treatment process of landfill leachate. The effluent of landfill leachate subjected to biochemical treatment is used as influent. The process adopts a coagulative precipitation tank, an oxidation tank, an anaerobic biological filter and a membrane treatment device and comprises the following steps of: (1) removing partial organic matter through coagulative precipitation to reduce chroma; (2) further removing refractory and non-biochemical organic matter with an oxidizer formed by ozone, and the like and improving the biodegradability of the effluent; (3) removing SS (Suspended Solid), organic matter and nitrate in the leachate through an anaerobic filter; and (4) ensuring that the effluent stability of the whole system through a membrane separation technology reaches the emission standard and canbe recyclable. The process has the advantages of lower operation cost, stable effluent, less quantity of generated concentrated liquid, less salt content in theconcentrated liquid, and the like, and the process of biochemistry and materialization of the pretreatment, which is used before using the membrane method, can prolong the service life of the membrane.

Description

technical field [0001] The present invention relates to a process for advanced treatment of landfill leachate, a process for advanced treatment of landfill leachate that combines coagulation, oxidation, anaerobic biological method, and membrane method. This process is difficult to handle domestically. The landfill leachate has excellent effect and is suitable for a wide range of water quality, suitable for the renovation and new construction of landfill leachate treatment projects. Background technique [0002] Improper treatment of landfill leachate will cause serious secondary pollution to the groundwater and surface water around the landfill, which has attracted the attention of all countries in the world. The water quality of domestic landfill leachate varies greatly. Generally speaking, COD ranges from 5,000 to 60,000mg / L, of which BOD content accounts for 25%-50%. In addition, it contains nearly 30 kinds of aromatic hydrocarbons that are difficult to biodegrade, nearl...

AI Technical Summary

Problems solved by technology

This invention solves the secondary pollution caused by landfill leachate at home and abroad, especially middle-aged and aging landfill leachate, which cannot be discharged up to standard by biological treatment alone, and the use of other treatment methods has large investment costs, large volume of concentrated liquid and is difficult to handle. Difficulties, so it is very suitable for the renovation or new construction of landfill leachate treatment facilities

Images