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Treatment system and treatment method for biochemical effluent of industrial wastewater

A treatment system and industrial waste water technology, applied in water/sewage treatment, oxidized water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of low concentrated water concentration, low recovery rate of fresh water, high treatment cost, etc.

Inactive Publication Date: 2018-02-02
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0008] Aiming at the problems existing in the prior art, such as low recovery rate of fresh water, low concentration ratio of concentrated water, high processing cost and unstable system operation, the object of the present invention is to provide a treatment system and method for biochemical effluent of industrial wastewater. The system and treatment method use the coupling and synergy of physicochemical method and membrane technology to give full play to their respective technical advantages and overcome the limitations of using a single technology to achieve advanced treatment and desalination of industrial wastewater. It has strong adaptability to raw water and high recovery rate of fresh water. It has the characteristics of high concentration ratio of concentrated water, which can greatly improve the reuse rate of industrial wastewater and reduce the discharge of wastewater. It can be applied to biochemical wastewater discharge in industries such as iron and steel, coal chemical industry, non-ferrous metals, coal power, petrochemical, pesticide, pharmaceutical, textile, etc. Advanced treatment and desalination reuse, promote the promotion and application of this technology in related industries

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  • Treatment system and treatment method for biochemical effluent of industrial wastewater

Examples

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Effect test

Embodiment 1

[0114] Example 1: Treatment system for industrial wastewater biochemical effluent

[0115] A treatment system for biochemical effluent of industrial wastewater, the treatment system includes a chemical precipitation unit and a flocculation sedimentation unit connected in sequence, a multimedia filtration unit, an advanced oxidation unit, an ultrafiltration unit, a precision filter, a reverse osmosis unit, and a nanofiltration unit , electrodialysis unit, evaporation unit and condensation unit;

[0116] The produced water outlet of the ultrafiltration unit is connected to the water inlet tank of the reverse osmosis unit, the concentrated water outlet of the reverse osmosis unit is connected to the water inlet of the nanofiltration unit, and the fresh water outlet of the nanofiltration unit is connected to the inlet of the electrodialysis unit. The water tank is connected, the concentrated water outlet of the nanofiltration unit is connected with the water inlet of the chemical ...

Embodiment 2

[0124] Example 2: Advanced treatment and desalination reuse of salty wastewater from coal chemical industry

[0125] Although the coal chemical industry saline wastewater treated by traditional technology can meet the discharge standard, the wastewater still contains a small amount of organic matter, colloid, suspended particles, Ca 2+ and Mg 2+ and other high-valent ions (if there is no special description in the present invention, high-valent ions all refer to ions with a valence of 3 or more), a large amount of other soluble inorganic salts, etc., the efflux will cause waste of water resources and environmental pollution. To realize this type of industrial For wastewater reuse, it is necessary to further remove residual organic matter and inorganic salts in wastewater. The existing ultrafiltration-reverse osmosis double-membrane treatment still has disadvantages such as low recovery rate of fresh water, low concentration of concentrated water, secondary pollution, and high...

Embodiment 3

[0136] Example 3: Advanced treatment and desalination reuse of salty wastewater from coal chemical industry

[0137] The coal chemical industry saline wastewater is the same as the coal chemical industry saline wastewater described in Example 2. Its processing method includes the following steps:

[0138] (1) The salty wastewater from the coal chemical industry after biochemical treatment is first treated by flocculation and sedimentation. The flocculant used is an inorganic flocculant and an organic flocculant with a mass ratio of 2000:1. The inorganic flocculant is polyaluminium chloride, and the organic flocculant The agent is polyacrylamide; flocculation and sedimentation treatment can effectively remove impurities such as total cyanide, small particle suspended matter, organic matter and colloid in coal chemical industry saline wastewater, among which the removal rate of total cyanide is 95%, and the removal rate of organic matter can reach 50%;

[0139] (2) The waste wa...

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Abstract

The invention provides a treatment system and treatment method for biochemical effluent of industrial wastewater. The treatment system comprises a flocculation sedimentation unit, a filtration unit, an advanced oxidation unit, an ultrafiltration unit, a reverse osmosis unit, a nanofiltration unit, an electrodialysis unit and an evaporation unit which are sequentially connected; and the water production outlet of the ultrafiltration unit is connected with the water inlet tank of the reverse osmosis unit, and the concentrated-water outlet of the reverse osmosis unit is connected with the water inlet of the nanofiltration unit. According to the invention, the treatment system and the treatment method utilize the coupling and synergistic effects of a physical-chemical method and a membrane technology to overcome the limitation of using a single technology, and the advanced treatment and desalination reuse of the industrial wastewater are realized; and the treatment system and the treatmentmethod have the advantages of strong adaptability to raw water, a high recovery rate of fresh water, a high concentration multiple of concentrated water, low energy consumption of evaporation and crystallization and the like, greatly improve the reuse rate of the industrial wastewater, reduce the amount of wastewater discharging, can be applied to the deep treatment and desalination reuse of various effluent wastewater, and promote the promotion and application of the technology in related industries.

Description

technical field [0001] The invention belongs to the technical field of advanced treatment of industrial wastewater, and relates to a treatment system and method for biochemical effluent of industrial wastewater, in particular to a method for realizing advanced treatment and desalination reuse of industrial wastewater through the coupling and synergistic effect of physicochemical method and membrane technology. Background technique [0002] Industrial wastewater refers to the wastewater discharged to the outside of the enterprise through all the outlets of the enterprise factory area, including production wastewater, direct cooling water discharged outside, mine groundwater discharged beyond the standard, and factory domestic sewage mixed with industrial wastewater. Classified according to the product processing objects of the industry, such as metallurgical wastewater, papermaking wastewater, coking gas wastewater, metal pickling wastewater, textile printing and dyeing wastew...

Claims

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Application Information

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IPC IPC(8): C02F9/10
CPCC02F1/001C02F1/041C02F1/048C02F1/441C02F1/442C02F1/444C02F1/4693C02F1/52C02F1/5236C02F1/56C02F1/72C02F9/00C02F2301/08Y02A20/131
Inventor 曹宏斌石绍渊李玉平盛宇星
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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