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Electronic industrial wastewater near zero release water treatment process

An electronic industry wastewater, near-zero discharge technology, applied in water/sewage treatment, biological water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of low efficiency, complicated acid recovery steps and methods, etc. Recovery efficiency, ensuring economic rationality and effectiveness, and long-term stable and reliable operation

Pending Publication Date: 2017-08-25
广东雅迪环保设备有限公司
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AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a treatment and recovery device for high COD organic wastewater, which solves the problems of complex steps and methods of acid recovery and low efficiency in the prior art

Method used

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  • Electronic industrial wastewater near zero release water treatment process
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Embodiment Construction

[0021] see figure 1 As shown, the present invention relates to a near-zero discharge water treatment process for electronic industrial wastewater, comprising the following steps:

[0022] Step 1: The original solution is directly put into the water tank for storage. The COD content of the original solution at this time is less than or equal to ≦3000, the TN is 153, and the pH is 10.2; COD is the chemical oxygen demand, which reflects the pollution of reducing substances in the water These substances include organic matter, nitrite, ferrous salt, sulfide, etc.; TN refers to the total amount of various forms of inorganic and organic nitrogen in water; PH is the basis for judging whether the solution is acidic, neutral or alkaline;

[0023] Step 2: Add physical and chemical drugs to the water tank once a month. The physical and chemical drugs are a mixture of hydrogen peroxide and sodium hypochlorite. The raw liquid after adding the physical and chemical drugs is processed by an ...

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Abstract

The invention relates to an electronic industrial wastewater near zero release water treatment process. A basic solution directly enters a water tank to be stored, and a physical and chemical agents is added into the water tank once every month; the basic solution treated in the second step is conveyed into a storage water tank through a pipeline, and the basic solution sequentially enters a PAC adjusting pond and a PAM adjusting pond through a lifting pump; the basic solution treated in the third step enters an MBR through a pipeline, and clear liquid obtained after membrane separation through the MBR enters a filter; filtrate enters a clear water tank through a pipeline, the filtrate is sequentially conveyed into a primary one-segment RO and a nanofiltration system to be filtered by the clear water tank through a pipeline, concentrated liquid separated by the nanofiltration system is recycled to the clear water tank through a pipeline, clear liquid separated by the nanofiltration system enters a secondary RO to be separated through a pipeline, and clear liquid separated through the secondary RO enters denitrification resin to be reused. Effluent reaches or is superior to corresponding water use indexes, and a treatment facility can run stably and reliably for a long time. By the adoption of the reasonable and effective treatment process technology, the economical efficiency, reasonability and effectiveness of overall construction investment are guaranteed, and meanwhile the running and using cost is reduced to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of industrial wastewater treatment, in particular to a near-zero discharge water treatment process for electronic industrial wastewater. Background technique [0002] The electronics industry is an industry that develops and produces electronic equipment and various electronic components, devices, instruments and meters, and is a military-civilian combined industry. It is composed of production industries such as radio and television equipment, communication and navigation equipment, radar equipment, electronic computers, electronic components, electronic instruments and meters, and other electronic special equipment. In the electronics industry, it is easy to produce electronic industrial wastewater, mainly acid wastewater. In addition to acid, acid wastewater often contains acid salts and other inorganic and organic substances. Acidic wastewater is highly corrosive and must be properly treated before it c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F2101/16C02F3/1268C02F2301/08C02F2305/026C02F1/5236C02F1/441C02F1/442C02F1/766C02F1/722C02F1/56C02F1/048C02F1/001
Inventor 衡云华应润兵张志雄黄启云
Owner 广东雅迪环保设备有限公司
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