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An electrochemical comprehensive treatment process for high-concentration and refractory organic wastewater

A technology for comprehensive treatment of organic wastewater, applied in water/sewage treatment, neutralized water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problem of affecting treatment efficiency, easy passivation of plates, and unsatisfactory Fenton reaction effects To achieve broad-spectrum treatment effect, avoid plate passivation, improve power efficiency and wastewater treatment efficiency

Active Publication Date: 2017-05-24
广东凯达环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But the patented electro-Fenton's Fe 2+ ions and H 2 o 2 Produced separately by the anode plate and the cathode in the same reaction tank, Fe 2+ ions and H 2 o 2 The proportional relationship of the process cannot be controlled, which leads to the unsatisfactory Fenton reaction effect. At the same time, under this operation, the plate is easily passivated, which affects the processing efficiency, and is not applicable in actual production.

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  • An electrochemical comprehensive treatment process for high-concentration and refractory organic wastewater

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Embodiment 1

[0036] Embodiment 1. Electrochemical comprehensive treatment process of high concentration and refractory organic wastewater of the present invention

[0037] Treatment of landfill leachate reverse osmosis concentrated water, the treatment capacity is 0.5m 3 / h, raw water conductivity: 24400μs / cm, COD: 1700mg / l.

[0038] S1. Adjust the pH value of the wastewater to 2.0, then the wastewater enters the electrocoagulation tank, and the adjustable pulsed direct current is passed to the positive and negative iron plates in the electrocoagulation tank for electrocoagulation oxidation treatment; the positive and negative iron plates use Repolarization series structure, and connected to the timing inverted power supply, the positive and negative exchange cycle of the plates is 20min, the distance between the plates is 1.0cmcm, and the current density is adjusted to 20mA / cm 2 , the residence time is 10min, and the waste water after the first oxidation is obtained;

[0039] S2, the wa...

Embodiment 2

[0043] Embodiment 2, the electrochemical comprehensive treatment process of high concentration and refractory organic wastewater of the present invention

[0044] Treatment of landfill leachate reverse osmosis concentrated water, the treatment capacity is 0.5m 3 / h, raw water conductivity: 26780μs / cm, COD: 1720mg / l.

[0045] S1. Adjust the pH value of the wastewater to 4.5, then the wastewater enters the electrocoagulation tank, and the adjustable pulse direct current is passed to the positive and negative iron plates in the electrocoagulation tank for electrocoagulation oxidation treatment; the positive and negative iron plates use Repolarized series structure, and connected to the timing inverted power supply, the positive and negative exchange cycle of the plates is 20min, the distance between the plates is 1.5cm, and the adjusted current density is 50mA / cm 2 , the residence time is 30min, and the waste water after the first oxidation is obtained;

[0046] S2, the waste w...

Embodiment 3

[0050] Embodiment 3, the electrochemical comprehensive treatment process of high concentration and refractory organic wastewater of the present invention

[0051] Treat landfill leachate MBR effluent with a treatment capacity of 0.5m 3 / h, raw water conductivity: 14680μs / cm, COD: 565mg / l.

[0052]S1. Adjust the pH value of the wastewater to 2.5, then the wastewater enters the electrocoagulation tank, and the adjustable pulsed direct current is passed to the positive and negative iron plates in the electrocoagulation tank for electrocoagulation oxidation treatment; the positive and negative iron plates use Repolarized series structure, and connected to the timing inverted power supply, the positive and negative exchange cycle of the plates is 20min, the distance between the plates is 1.5cm, and the adjusted current density is 30mA / cm 2 , the residence time is 20min, and the waste water after the first oxidation is obtained;

[0053] S2, the waste water after the first oxidati...

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Abstract

The invention belongs to the field of wastewater treatment, and particularly relates to an electrochemical comprehensive treatment technology for high-concentration organic wastewater hard to degrade. The wastewater treatment technology comprises pH regulation, electric flocculation, electro-fenton comprehensive treatment, aeration oxidation and coagulating sedimentation. The technology can effectively degrade various benzene rings, phenols, macromolecular compounds to break bonds, the good treatment effect is achieved for organic matters and complexing state heavy metal hard to degrade, the wastewater COD and chroma removal effect is good, the BOD / COD ratio is increased, the wastewater biodegradability is remarkably improved, the treatment efficiency is high, power consumption is low, medicament consumption is low, mud consumption is low, and the good economic and social effect is achieved.

Description

technical field [0001] The invention belongs to the field of wastewater treatment and relates to an electrochemical comprehensive treatment process for high-concentration, refractory organic wastewater. Background technique [0002] With the rapid development of industry, the types and quantities of wastewater have increased rapidly, and the pollution of water bodies has become increasingly widespread and serious, threatening human health and safety. Some chemical wastewater, pharmaceutical and pharmaceutical intermediate wastewater, dye wastewater, oil and gas field wastewater, landfill leachate, coating wastewater, electroplating wastewater, leather wastewater and coking wastewater not only have high concentration of organic matter, but also are highly toxic, non-biodegradable, and mostly persistent Organic substances (POPs), which are extremely harmful to the environment and human body, are called "three causes" (teratogenic, carcinogenic, mutagenic) substances, and envir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/06C02F101/30
CPCC02F1/463C02F1/4672C02F1/52C02F1/66C02F1/72C02F9/00C02F2101/30
Inventor 李小春童小林阚凯
Owner 广东凯达环保科技有限公司
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