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Electrochemistry-assisted efficient composite desalination method

An electrochemical and high-efficiency technology, applied in chemical instruments and methods, electrochemical water/sewage treatment, anaerobic digestion treatment, etc., can solve problems such as unstable concentration and activity, fluctuating salinity in effluent, and affecting water reuse , to avoid the cost of sludge replacement, increase the amount of reused water, and prevent sludge calcification

Pending Publication Date: 2021-08-31
山东环发科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is easily affected by the unstable concentration and activity of microorganisms in the system, resulting in fluctuations in the salt content of the system effluent. Fluctuations in salt content sometimes cause scaling in pipes and affect water reuse.

Method used

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  • Electrochemistry-assisted efficient composite desalination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] An electrochemically assisted high-efficiency composite desalination method, comprising the following steps:

[0049] 1) Add anaerobic sludge to the wastewater to be treated for anaerobic reaction treatment, and get anaerobic treated wastewater after treatment; the anaerobic sludge is mixed with granular and flocculent sludge, and the sludge concentration is controlled at 1-20g / L, the inlet water temperature is controlled at 32-39°C, and the pH of the inlet water is controlled at 6-9;

[0050] 2) Add aerobic biochemical sludge to the wastewater after anaerobic treatment for aerobic biochemical reaction treatment. The dissolved oxygen is controlled at 0.5-3mg / L, and the sludge concentration is controlled at 0.5-3g / L. After treatment, aerobic biochemical treatment is obtained. After waste water;

[0051] 3) After the aerobic biochemical treatment, the wastewater undergoes an electrochemical reaction, and the salt in the water is precipitated and adsorbed on the surface ...

Embodiment 2

[0063] The electrochemical assisted high-efficiency composite desalination method as described in Example 1, the difference is:

[0064] The anaerobic sludge concentration is controlled at 20-40g / L; the aerobic biochemical dissolved oxygen is controlled at 2-4mg / L, and the aerobic biochemical sludge concentration is controlled at 3-6g / L.

Embodiment 3

[0066] The electrochemical assisted high-efficiency composite desalination method as described in Example 1, the difference is:

[0067] The anaerobic sludge concentration is controlled at 40-60g / L; the aerobic biochemical dissolved oxygen is controlled at 4-6mg / L, and the aerobic biochemical sludge concentration is controlled at 6-10g / L.

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Abstract

The invention relates to an electrochemistry-assisted high-efficiency composite desalination method. According to the method, wastewater is subjected to electrochemical desalination after being subjected to anaerobic and aerobic biochemical treatment, most salt in the wastewater can be separated out through anaerobic and aerobic treatment, the salt content of the recycled water can be stabilized or further reduced through electrochemical desalination, the total salt content in the recycled water is greatly reduced, the fluctuation of the salt content of effluent of the system caused by unstable concentration and activity of microorganisms in the system is avoided, the amount of treated water recycled is increased, and a large amount of water is saved. The desalination cost can be effectively controlled, meanwhile, the requirement of production for reuse water is met, and the production stability of enterprises is guaranteed.

Description

technical field [0001] The invention relates to an electrochemically assisted high-efficiency composite desalination method, which belongs to the technical field of environmental protection water treatment and purification. Background technique [0002] With the increase in the cost of industrial water use, in order to control costs and reduce the amount of clean water used in production, most production companies currently adopt measures to reuse wastewater after treatment to increase the number of cycles of wastewater in the production process. Further reduce the external drainage of the enterprise and save costs. It is well known that as the wastewater circulates through the system more times, the salt content in the wastewater also accumulates. If the wastewater treatment system cannot effectively remove the salt, the salt content of the reused water will accumulate more and more with the increase of the number of cycles, and the reuse of high-salt wastewater will affec...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/46C02F3/02C02F3/1205C02F3/28C02F3/30C02F3/1215C02F2001/007C02F1/469C02F1/4602
Inventor 彭吉成
Owner 山东环发科技开发有限公司
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