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Method for synchronously catalytically oxidizing non-degradable pollutants in secondary effluent and degrading remained sludge

A technology of excess sludge and secondary effluent, which is applied in the fields of advanced oxidation and bioelectrochemistry, and can solve the problems of high cost of excess sludge treatment and low utilization rate of resources

Active Publication Date: 2019-01-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the existing technical problems of high treatment cost of refractory pollutants or excess sludge in water and low resource utilization rate, and provides a method for synchronous catalytic oxidation of refractory pollutants and excess sludge in secondary effluent water The method uses the electricity generation and anodic degradation of the bioelectrochemical system and the high efficiency of the electro-Fenton catalytic oxidation technology to simultaneously degrade the remaining sludge and the refractory pollutants in the secondary effluent in one system

Method used

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  • Method for synchronously catalytically oxidizing non-degradable pollutants in secondary effluent and degrading remained sludge

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specific Embodiment approach 1

[0014] Embodiment 1: A method of synchronously catalytically oxidizing refractory pollutants in secondary effluent water and degrading excess sludge in this embodiment is carried out according to the following steps:

[0015] 1. Construct a bioelectrochemical coupling electro-Fenton synchronous degradation system: the reaction system consists of an anode chamber 1, a cathode chamber 2, a proton exchange membrane 3, an external resistance 4 and a multi-channel data collector 5; the proton exchange membrane 3 is set on the anode Between chamber 1 and cathode chamber 2; a carbon fiber brush 1-1 is placed in the middle of the anode chamber 1 as an anode, and the top is provided with a gas collection port 1-2 and a gas collection bag 1-7, and the calomel reference electrode 1-3 is partially inserted into the anode Indoor, the sampling port 1-4 is set under the anode chamber, the rotor 1-5 is placed at the bottom of the anode chamber, and the magnetic stirrer 1-6 is used for stirring...

specific Embodiment approach 2

[0018] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the iron-containing composite electrode (2-1) described in step one is Fe&Fe 2 o 3 / carbon fiber or MnO 2 &Fe 2 o 3 / carbon fiber; others are the same as in Embodiment 1.

specific Embodiment approach 3

[0019] Specific embodiment three: the difference between this embodiment and specific embodiment two is: Fe&Fe 2 o 3 / The preparation method of carbon fiber is as follows: 1.8g FeCl 3 -6H 2 O was dissolved in 200ml of deionized water to obtain a ferric iron solution; 3.6g of NaBH 4 Dissolve in 80ml of deionized water to get NaBH 4 solution; brush the carbon fiber clean, after 20min ultrasonic in the ferric solution, NaBH 4 Add it into it, then wash it with deionized water, bake it in an oven at 105°C for 3 hours, take it out, and put it in a tube furnace protected by nitrogen, N 2 Intake air velocity is 50cm 3 / min, temperature 500°C, sintering for 3h, take it out and wash it with deionized water to get Fe&Fe 2 o 3 / carbon fiber. Others are the same as in the second embodiment.

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Abstract

The invention provides a method for synchronously catalytically oxidizing non-degradable pollutants in secondary effluent and degrading remained sludge, relates to the method for catalytically oxidizing secondary tail water and degrading remained sludge, and aims at solving existing problems of high treatment cost and low resource utilization of non-degradable pollutants and remained sludge in water. The method comprises the following steps: 1, constructing a bio-electrochemical coupling electro-Fenton reaction system; 2, respectively adding nutrient solution and electron receptor solution into an anode chamber and a cathode chamber, and inoculating the anode chamber with remained sludge, and using a carbon brush of iron-containing oxide as a compound cathode; culturing until the output voltage is stable and more than 0.65V to successfully start; and 3, respectively adding the remained sludge to be treated and secondary effluent containing non-degradable pollutants into the anode chamber and the cathode chamber for synchronous treatment. According to the method, the treatment rate for non-degradable pollutants can be 62-99 percent, the degradation rate for organic matters in remained sludge can be 40-65 percent. The method can be used for synchronous treatment of secondary effluent and remained sludge.

Description

technical field [0001] The invention belongs to the technical field of bioelectrochemistry and advanced oxidation technology, and specifically relates to a method for realizing the degradation of secondary effluent containing refractory pollutants and synchronously realizing the degradation and resource utilization of excess sludge. Background technique [0002] Biomass, as an energy resource, has been paid more and more attention. It is a kind of energy form that exists and distributes very widely and has huge potential. The chemical oxygen demand of 1kg biomass is equivalent to 4kW·h of energy. Microbial electrochemical system is a system that uses microorganisms as catalysts to convert chemical energy in biomass into electrical energy. It is an emerging technology that effectively recovers energy and resources. It has attracted widespread attention from all over the world. The substrates in the MES system come from a wide range of sources. , almost all pollutants that can...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/467C02F3/00C02F3/28
CPCC02F1/4672C02F3/005C02F3/2853C02F3/2866Y02A50/20
Inventor 赵庆良王维业王琨姜珺秋丁晶史珂
Owner HARBIN INST OF TECH
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