Method for realizing three-dimensional electrochemical/three-dimensional electrobiological coupled advanced treatment of waste leachate reverse osmosis concentrated water

Abstract

The invention discloses a method for realizing three-dimensional electrochemical / three-dimensional electrobiological coupled advanced treatment of waste leachate reverse osmosis concentrated water. The method comprises the steps of pretreatment, three-dimensional electrochemical / three-dimensional electrobiological coupled treatment and subsequent desalting, wherein the pretreatment step comprises:water quality and water quantity regulation and coagulative precipitation are performed to remove suspended substances, colloid impurities and ions such as calcium ions, magnesium ions and the like in wastewater; the effluent water after the pretreatment is introduced into a three-dimensional electrochemical / three-dimensional electrobiological coupled device, and ring opening, bond breaking, mineralization and degradation are performed on nondegradable organic substances through three-dimensional electrochemical treatment to improve the B / C of the sewage; and under the synergistic action of electric field energy and microorganisms, three-dimensional electrobiological treatment simultaneously realizes nitrification, denitrification and mineralization, thereby being beneficial to the subsequent desalting. The waste leachate concentrated solution treatment method provided by the invention has the advantages of favorable treatment effect, stable operation, small occupied area, high impactresistance, high automation degree, high operation simplicity and the like.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, and relates to a leachate treatment method in a landfill site, and more specifically to a method for advanced treatment of the leachate concentrate by three-dimensional electrochemical coupling three-dimensional electrobiological technology for the leachate concentrate. Background technique [0002] The treatment of landfill leachate has become a major issue in the field of environmental management. Landfill leachate has high content of toxic and harmful substances, complex components, difficult to biodegrade, and great harm to the environment. At present, one of the main methods of landfill leachate treatment is the combination process of "pretreatment + MBR membrane biological system + reverse osmosis advanced treatment". , A large amount of reverse osmosis concentrated water will inevitably be produced. The reverse osmosis concentrated water of landfill leachate has high salinity, hi...

AI Technical Summary

Problems solved by technology

Recharge causes a large amount of dissolved salts to accumulate, which will lead to degradation or failure of the efficiency of the leachate treatment system for a long time; evaporation is expensive, highly corrosive to equipment, and difficult to implement on a large scale

Moreover, many landfills do not allow the concentrate to recharge, and the concentrate needs to be treated separately

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