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Zero-discharge treatment process for organic wastewater

A treatment process and organic wastewater technology, applied in the field of zero discharge of water treatment, can solve problems such as inability to use directly, waste of water resources, and great environmental hazards, and achieve the effects of reducing membrane pollution, interference, and inorganic pollution

Pending Publication Date: 2021-04-09
郑州中科新兴产业技术研究院 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This causes a lot of waste of water resources. At the same time, the salt obtained through evaporation and crystallization is mixed salt, which cannot be used directly. It is a hazardous waste and is harmful to the environment.

Method used

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  • Zero-discharge treatment process for organic wastewater

Examples

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Effect test

Embodiment 1

[0042] The organic wastewater of a steel factory adopts the treatment system and treatment method of the present invention after the biological aeration tank. The organic wastewater is pumped from the biological aeration tank to the high-efficiency sedimentation tank. The high-efficiency sedimentation tank is an advection sedimentation tank, and the sedimentation tank Including, water inlet area, sedimentation area, water outlet area and sludge area. The number of sedimentation tanks is 3, in order to switch work when a failure occurs. The aspect ratio of the sedimentation tank is 5. The effective water depth is 1m, and the slope of the sludge bucket is less than 42°. The super-high part around the sedimentation tank is 0.4 m to control abnormal water level and cause water overflow. The mud discharge pipe is generally made of stainless steel with a diameter of 400 mm. The water treated by the high-efficiency sedimentation tank enters the softening unit and should overflow b...

Embodiment 2

[0052] The organic wastewater of a steel factory adopts the treatment system and treatment method of the present invention after the biological aeration tank. The organic wastewater is pumped from the biological aeration tank to the high-efficiency sedimentation tank. The high-efficiency sedimentation tank is an advection sedimentation tank, and the sedimentation tank Including, water inlet area, sedimentation area, water outlet area and sludge area. The number of sedimentation tanks is 4, in order to switch work when a failure occurs. The aspect ratio of the sedimentation tank is 6. The effective water depth is 1.2m, and the slope of the sludge bucket is less than 45°. The super-high part around the sedimentation tank is 0.5 m to control abnormal water level and cause water overflow. The mud discharge pipe is generally made of stainless steel with a diameter of 500 mm. The water treated by the high-efficiency sedimentation tank enters the softening unit and should overflow...

Embodiment 3

[0062] The organic wastewater of a steel factory adopts the treatment system and treatment method of the present invention after the biological aeration tank. The organic wastewater is pumped from the biological aeration tank to the high-efficiency sedimentation tank. The high-efficiency sedimentation tank is an advection sedimentation tank, and the sedimentation tank Including, water inlet area, sedimentation area, water outlet area and sludge area. The number of sedimentation tanks is 5, in order to switch work when a failure occurs. The aspect ratio of the sedimentation tank is 7. The effective water depth is 1.5m, and the slope of the sludge bucket is less than 50°. The super-high part around the sedimentation tank is 0.6 m to control abnormal water level and cause water overflow. The mud discharge pipe is generally made of stainless steel with a diameter of 600 mm. The water treated by the high-efficiency sedimentation tank enters the softening unit and should overflow...

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Abstract

The invention provides a zero-discharge treatment process for organic wastewater. An efficient precipitation unit, a softening unit, a filtering unit, an ion exchange unit, an ultrafiltration filtering unit, a reverse osmosis unit, an ozone catalytic oxidation unit, an electrodialysis concentration unit and a bipolar membrane electrodialysis system are sequentially included. According to the invention, through integrated optimization of the whole treatment section, a new process of organic wastewater deep treatment and desalination recycling treatment is established, the fresh water recovery rate is greatly improved, the discharge amount of concentrated water is reduced, the low-cost deep treatment and desalination recycling of organic wastewater are realized, and an organic wastewater deep treatment and desalination recycling process is formed.

Description

technical field [0001] The invention relates to the field of zero discharge of water treatment, in particular to a process for treating organic wastewater with zero discharge. Background technique [0002] The organic wastewater mainly comes from the gas washing wastewater in the production process, the drainage of the circulating water system, the drainage of the chemical water station, etc., and sometimes includes the organic wastewater after biochemical treatment. Mainly, part of the wastewater also contains refractory organic matter. The TDS of this kind of wastewater is usually around 5000 mg / L, or even higher, and cannot be reused directly. High-salt wastewater causes great pressure on biodegradation. [0003] The treatment of organic wastewater has been studied by many people at home and abroad, and there are many public documents. For example, CN107651794A discloses a treatment system and method for biochemical effluent of industrial wastewater; CN105174585A provide...

Claims

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Application Information

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IPC IPC(8): C02F9/06C02F101/30
CPCC02F9/00C02F1/001C02F2001/007C02F1/441C02F1/442C02F1/444C02F1/78C02F1/725C02F1/4693C02F2303/14C02F2303/16C02F2301/08C02F2101/30C02F5/02C02F1/283Y02A20/131
Inventor 郭强刘艳杰李永利张曼曼石绍渊
Owner 郑州中科新兴产业技术研究院
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