A method for advanced treatment of high-nitrogen organic wastewater membrane filtration concentrate

Abstract

The present invention proposes a high-nitrogen organic wastewater membrane filtration concentrate advanced treatment system and method, including: a water storage tank, an adsorption reaction tank, a coagulation tank, a sedimentation tank, an intermediate water tank, an MBR reaction tank and an electrocatalytic oxidation reaction tank; wherein, The water storage tank is connected with the adsorption reaction tank through a centrifugal pump; the effluent of the adsorption reaction tank enters the coagulation tank through the centrifugal pump, enters the sedimentation tank, and then flows into the intermediate pool; the effluent of the intermediate pool is continuously Flow into the MBR reaction pool, the MBR reaction pool includes a membrane pool, and the ultrafiltration membrane is set in the membrane pool; the effluent of the MBR reaction pool is lifted into the electrocatalytic oxidation reaction pool by a centrifugal pump, and the electrocatalytic oxidation reaction pool is equipped with positive and negative An electrode and a power supply are provided, and a circulation pump is provided to circulate the liquid in the electrocatalytic oxidation reaction cell. The COD and TN removal rate in the concentrated solution is high, the effluent water quality can meet the discharge standards, no pollutants can be completely removed, and there is no secondary pollution and pollutant transfer.

Description

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

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

Images