Deep treatment system and method for high-nitrogen organic wastewater membrane-filtered concentrate

Abstract

The invention provides a deep treatment system and method for high-nitrogen organic wastewater membrane-filtered concentrate. The deep treatment system comprises a water storage pond, an adsorption reaction tank, a coagulating tank, a settling tank, a middle water tank, an MBR (membrane bioreactor) and an electrocatalytic oxidation reaction tank, wherein the water storage pond is connected with the adsorption reaction tank through a centrifugal pump; effluent of the adsorption reaction tank enters the coagulating tank through the centrifugal pump, then enters the settling tank and flows into the middle water tank; effluent of the middle water tank continuously flows into the MBR reaction tank through the centrifugal pump; the MBR reaction tank comprises a membrane tank; an ultrafiltrationmembrane is arranged in the membrane tank; effluent of the MBR reaction tank is lifted by the centrifugal pump and enters the electrocatalytic oxidation reaction tank; a positive electrode, a negativeelectrode and a power supply are arranged in the electrocatalytic oxidation reaction tank, and a circulating pump is provided to enable liquid in the electrocatalytic oxidation reaction tank to flowcyclically. The COD and TN removal rate in the concentrate is high, and the effluent can be discharged on standard and contains no pollutants; the pollutants are removed thoroughly; secondary pollution and pollutant transferring are avoided.

Description

technical field [0001] The invention relates to the advanced treatment of high-nitrogen organic wastewater membrane filtration concentrated liquid, in particular to the advanced treatment of landfill leachate concentrated liquid. Background technique [0002] As the discharge standards for landfill leachate and industrial wastewater treatment become more and more stringent, treatment units such as nanofiltration and reverse osmosis have become advanced treatment processes after biochemical treatment of landfill leachate and industrial wastewater. Although this treatment process can make the effluent index after leachate treatment and industrial wastewater basically meet the requirements of the discharge standard, the membrane filtration does not degrade the toxic and harmful pollutants, but only enriches and concentrates them as a by-product of membrane treatment. , the concentrate will cause greater harm to the environment. The concentrated solution produces a higher amoun...

AI Technical Summary

Problems solved by technology

These membrane concentrates contain organic substances that cannot be degraded by biochemical methods. The treatment of concentrates has become an obstacle that limits the wide application of membrane technology. How to effectively treat these concentrates containing a large number of pollutants has become an urgent problem.

[0003] Traditional treatment methods such as recharge and evaporation have failed to completely solve the problem of concentrated liquid. However, although a single Fenton method, electrocatalytic oxidation method or ozone catalytic oxidation method can oxidize organic matter, there is often TN (total nitrogen, total nitrogen) removal. Low efficiency, high energy consumption and other issues

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