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A method for sludge reduction coupled with electrochemical/chlorine dioxide catalytic oxidation

A chlorine dioxide catalytic oxidation phase, sludge reduction technology, applied in the oxidation treatment of sludge, chemical instruments and methods, water/sludge/sewage treatment, etc. , the effect of enhancing the electrochemical reaction and improving the reaction efficiency

Inactive Publication Date: 2015-12-09
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In the prior art, there is no process using electrochemical technology for sludge reduction treatment, and the use of ClO 2 Patents related to sludge reduction treatment by catalytic oxidation methods are also rare

Method used

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  • A method for sludge reduction coupled with electrochemical/chlorine dioxide catalytic oxidation

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Embodiment 1

[0025] refer to figure 1 , the sludge treatment system includes a sludge main reaction tank reaction 1, and a biochemical reaction tank 13 for further digestion of treated sludge. The sludge in the sludge concentration tank of the sewage treatment plant enters the main reaction tank 1 through the sludge mixture inlet 5, and at the same time, the system is fed with direct current. Sludge is treated by electrocatalytic oxidation. ClO 2 Generator 7 produces ClO 2 gas, through ClO 2 The gas distribution equipment 8 enters the main reaction tank, and generates ClO to the sludge under the catalysis of the catalyst on the auxiliary anode 4. 2 Catalytic oxidation reaction. Due to the existence of the sludge circulation pump 10 and the sludge storage tank 11, the reaction sludge can be circulated into the main reaction tank 1 for many times for reaction. After the reaction, the tail gas is treated and discharged by the tail gas destroyer 9. The treated sludge that meets the treat...

Embodiment 2

[0027] A sewage treatment plant sludge mixture, the concentration of mixed liquid sludge MLSS=8970mg / L, take 20L of the mixed solution into the sludge storage tank 11, start the sludge circulation pump 10 to transport the sludge to the main reaction tank 1, through input direct current, the electrochemical catalytic system composed of the main anode 2, the cylindrical cathode 3 and the auxiliary anode 4 performs electrocatalytic oxidation treatment on the sludge, and the ClO 2 Generator 7 produces ClO 2 gas, through ClO 2 The gas distribution equipment 8 enters the main reaction tank, and generates ClO to the sludge under the catalysis of the catalyst on the auxiliary anode 4. 2 Catalytic Oxidation Reaction, ClO 2 The dosage is 0.05gClO 2 / gMLSS. The sludge goes through the circulation equipment and enters the main reaction tank 1 continuously for reaction. After 60 minutes of reaction, the sludge MLSS inside the main reaction tank 1 dropped to 2150mg / L, and the contents ...

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Abstract

The invention discloses a sludge reduction promoting system under the combination of electrochemical and ClO2 catalytic oxidation. The system comprises a main reaction tank, a ClO2 generator, a cycling sludge pump and a sludge storage tank which are connected in sequence, wherein a main reaction tank cycling system and a biochemical reactor form a two-stage treatment system; the main reaction tank is used for performing electrochemical and ClO2 catalytic oxidation; a DSA (Dimensionally Stable Anode) columnar main anode, a cylindrical stainless steel cathode and an auxiliary anode form an electrolytic tank in a form similar to a three-dimensional electrode; a gas outlet pipe of the ClO2 generator is connected with the bottom part of the main reaction tank; a gas distribution system is arranged in the main reaction tank; the top of the main reaction tank is sealed; the reaction exhaust is connected to an exhaust destructor through an outlet pipe on the top of the main reaction tank; a treated gas outlet is formed in the exhaust destructor; a sludge mixing liquid inlet is formed in the lower part of the main reaction tank, and a treated sludge outlet is formed in the upper part. The sludge reduction method realizes oxidization and in-situ reduction of sludge, is high in ClO2 utilization rate and low in operation energy consumption, and has a good sludge reduction effect.

Description

technical field [0001] The invention relates to a sludge treatment system, in particular to a coupled electrochemical / chlorine dioxide catalytic oxidation phase [0002] sludge reduction method. Background technique [0003] At present, the sewage treatment method commonly used in sewage treatment plants is the activated sludge method. In the process of sewage treatment by the activated sludge method, the organic matter in the sewage and pollutants such as nitrogen and phosphorus are absorbed by microorganisms, the sewage is purified, and new pollutants are formed at the same time. Microorganisms, namely activated sludge. As the sewage treatment process proceeds, microorganisms continue to increase and accumulate. In order to maintain the balance of the biological treatment system, it is necessary to discharge part of the sludge, that is, the excess sludge. The excess sludge produced by urban sewage treatment plants needs to be concentrated, dehydrated, digested, and then ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F11/00C02F11/06C02F11/02
Inventor 傅金祥王东黄殿男王铎
Owner SHENYANG JIANZHU UNIVERSITY