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Chemical-electrochemical-biological three-section combined wastewater treatment device and application thereof

A wastewater treatment and electrochemical technology, applied in the field of environmental protection and sewage treatment, can solve the problems of high organic matter, high phosphorus in passivation liquid wastewater, poor biodegradability, etc., to reduce the generation of iron sludge, high sludge age, The effect of short reaction times

Pending Publication Date: 2021-12-31
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the characteristic defects of high phosphorus, high organic matter and poor biodegradability of passivation liquid wastewater, the present invention provides a chemical-electrochemical-biological three-stage combined wastewater treatment device and a treatment method using it for steel passivation liquid wastewater

Method used

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  • Chemical-electrochemical-biological three-section combined wastewater treatment device and application thereof
  • Chemical-electrochemical-biological three-section combined wastewater treatment device and application thereof
  • Chemical-electrochemical-biological three-section combined wastewater treatment device and application thereof

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Embodiment 1

[0031] Such as figure 1As shown, a chemical-electrochemical-biological three-stage combined wastewater treatment device provided for this implementation includes a chemical phosphorus removal reactor 1, a filter type cathode electro-Fenton reactor 2 and an MBR pool 3, and is characterized in that, The chemical phosphorus removal reactor 1 is composed of two parts: the chemical phosphorus removal reaction zone and the chemical phosphorus removal precipitation zone, wherein the chemical phosphorus removal reaction zone is equipped with a stirring mixing device and a chemical dosing device; the filter cathode electro-Fenton reactor 2 includes Reactor shell, filter cathode, anode, DC stabilized power supply, water inlet and outlet system, first aeration system and chemical dosing system, in which the filter cathode is composed of a membrane frame and mesh electrodes on both sides, and the membrane frame The upper part is provided with a suction port communicating with the filtered...

Embodiment 2

[0037] This embodiment provides a treatment method for applying the chemical-electrochemical-biological three-stage combined wastewater treatment device provided in Example 1 to steel passivation liquid wastewater, including the following steps:

[0038] 1) Chemical phosphorus removal stage: add phosphorus removal agent to the chemical phosphorus removal reaction area, the high concentration of phosphate in the steel passivation liquid wastewater reacts with the phosphorus removal agent, and the phosphate formed by the reaction precipitates in the chemical phosphorus removal precipitation area through solid-liquid Separation and removal; due to the coagulation and precipitation of chemical phosphorus removal agents, the chemical phosphorus removal process is accompanied by the removal of part of suspended solids and organic matter;

[0039] 2) Filtration-type cathodic electro-Fenton stage: through step 1) the liquid after solid-liquid separation enters the filtration-type catho...

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Abstract

The invention discloses a chemical-electrochemical-biological three-section combined wastewater treatment device and a treatment method for steel passivation solution wastewater by adopting the chemical-electrochemical-biological three-section combined wastewater treatment device, the device comprises a chemical phosphorus removal reactor, a filter type cathode electro-Fenton reactor and an MBR tank, the chemical phosphorus removal reactor consists of a reaction zone and a precipitation zone, the filtering type cathode electro-Fenton reactor comprises a filtering type cathode, an anode, a first aeration system and the like, and the MBR tank comprises a membrane component, a second aeration system and the like. The filtering type cathode electro-Fenton reactor can effectively utilize residual Fe<2+> in a chemical phosphorus removal section, the filtering type cathode can achieve the purpose of solid-liquid separation, and meanwhile, iron substances intercepted on the surface of an electrode can still continue to be subjected to an interface Fenton reaction; through organic combination of chemical phosphorus removal, filtering type cathode electro-Fenton and MBR technologies, high-efficiency removal of refractory organics and phosphates in passivation solution wastewater can be realized, and the method has the advantages of small dosage of chemicals, low operation cost, short reaction time, high treatment efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and sewage treatment, and specifically relates to a chemical-electrochemical-biological (C-EC-B) three-stage combined wastewater treatment device and a treatment method applied to steel passivation liquid wastewater using the same. The combined process of chemical phosphorus removal-filter cathodic electro-Fenton-MBR was developed. Background technique [0002] Organic passivation is a metal surface treatment technology that prevents corrosion of steel in humid environmental media. During the organic passivation process of the steel surface, a large amount of refractory organic wastewater containing high phosphorus, high organic matter and poor biodegradability (i.e. passivation solution wastewater) will be produced, and the direct discharge of passivation solution wastewater without effective treatment will cause damage. Accumulation of persistent organic pollutants in receiving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/10C02F101/30
CPCC02F9/00C02F1/5236C02F1/4672C02F3/1268C02F2305/026C02F2101/105C02F2101/30C02F1/5281
Inventor 王志伟查文桂王雪野李先凤
Owner TONGJI UNIV
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