Method for solving scaling of cathode of electro-catalytic biological aerated filter

Abstract

The invention provides a method for solving the scaling phenomenon of a cathode in an electro-catalytic biological aerated filter, and aims to effectively solve a series of problems such as reactor blockage, low current efficiency or particle electrode hardening and the like caused by the scaling phenomenon and a series of operation management problems such as filter material hardening, high operation pressure, unsmooth water passing and the like which are caused by insufficient local backwashing strength due to stagnation and non-uniform gas distribution in a backwashing process. When the method is used for performing backwashing on an electro-catalytic biological aerated filter, the cathode and the anode of the electro-catalytic biological aerated filter are exchanged, a reactor is subjected to gas washing for 5-8 minutes, gas-water combined washing is carried out for 7-10 minutes, and after water washing is performed for 8-10 minutes, and the cathode and the anode are exchanged again. According to the invention, a large number of experimental phenomena prove that scaling substances on the surface of the cathode are obviously reduced after the reactor which is used for a long time uses the backwashing method provided by the invention, and no obvious deposition of the scaling substances on the cathode exists after a newly-built reactor uses the backwashing method provided by the invention.

Description

technical field [0001] The patent of the present invention relates to the solution to the fouling problem of the cathode of the electrocatalytic aerated biological filter. It can be used in the advanced treatment unit of the sewage treatment plant. Background technique [0002] At present, biological method is the most common sewage treatment process. The biological method can remove the odor, organic matter and chroma in the water, and the process is mature, the management is convenient, the operation cost is low, and the operation is simple. However, the biochemical method is not thorough enough to decompose toxic emerging organic pollutants, and the decomposition speed is slow, and sometimes loses its activity due to poisoning; the electrochemical method is that pollutants in water can be efficiently removed by redox reactions by gaining or losing electrons. It can produce advanced oxidation reactions represented by hydroxyl radicals. The rapid development of electroch...

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Problems solved by technology

[0004] The present invention proposes a method to solve cathode fouling in electrocatalytic biological aerated filter to solve a series of problems caused by cathode fouling, such as reactor blockage, low current efficiency or particle electrode hardening, etc., and also increase the backwashing process The hysteresis and uneven distribution of air in the middle cause a series of operation and management problems such as insufficient backwash intensity in the local area, hardening of the filter material, high operating pressure, and poor water flow.

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