Wastewater electrochemical enhanced treatment device and method

A sewage electrochemical and enhanced treatment technology, applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc., can solve problems such as unfavorable sustainable development, increased treatment costs, and increased manpower and material resources. To achieve the effect of overcoming the low efficiency of biological treatment, low operation and management costs, and simple and convenient operation

Pending Publication Date: 2019-01-18
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The treatment effect of the traditional sewage biological treatment process is greatly affected by the quality and quantity of influent water and the activity of biological sludge, and the biological treatment process needs to spend time and resources to domesticate and cultivate activated sludge in the early stage of the biological treatment process to successfully start the bioreactor
Conventional biological treatment does not work well for sewage with large fluctuations in water quality and quantity, low-carbon sources and other nutrient imbalances
At present, when the conventional biological treatment process fails to meet the standard, it is usually combined with chemical methods to enhance the removal effect of nitrogen and phosphorus. Generally, carbon sources are added to strengthen the biological treatment process, and phosphorus removal agents (flocculants) are added to enhance phosphorus removal. method, but the corresponding cost is relatively high and the sludge produced after chemically enhanced phosphorus removal still needs further treatment, which will increase additional manpower and material resources and increase treatment costs
In addition, it is also a waste of resources to dispose of the phosphorus-rich chemical sludge produced by the chemically enhanced phosphorus removal process, which is not conducive to sustainable development.

Method used

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  • Wastewater electrochemical enhanced treatment device and method
  • Wastewater electrochemical enhanced treatment device and method
  • Wastewater electrochemical enhanced treatment device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Adopt the present invention to process the influent raw water of a certain water quality purification plant, the influent water quality situation is as follows:

[0055] Water quality: CODcr 26.7~69.5mg / L; NH3-N 17.7~26.3mg / L; TN 18.8~29.5mg / L; TP 1.1~1.9mg / L.

[0056] The processing effect is as follows:

[0057] like figure 2 As shown, the first electrolytic cell 2 has a remarkable removal effect on TP. When the current intensity I=5A and the treatment time is 3h, the TP concentration can be reduced to below 0.5mg / L, and the TP removal rate is about 75%; the treatment time is up to 6h When , the concentration of TP can be reduced to 0.2mg / L, and the removal rate of TP is about 90%.

[0058] like image 3 As shown, the first electrolytic cell 2 has a better removal effect on COD. When the current intensity I=5A and the treatment time is 6h, the COD concentration can be reduced to 25-30 mg / L, and the COD removal rate is about 35-50%.

[0059] like Figure 4 As sho...

Embodiment 2

[0063] The present invention is used to strengthen the treatment of the effluent of a membrane bioreactor (MBR) in a certain water purification plant. Only phosphorus in the effluent fails to meet the standard, and the water quality is as follows:

[0064] Water quality: CODcr 5.2~11.7 mg / L; NH3-N 0.13~0.34 mg / L; TN 8.5~12.7 mg / L; TP 1.3~1.6mg / L

[0065] The processing effect is as follows:

[0066] like Image 6 As shown, when the first electrolytic cell 2 has a current intensity of I=1A and a treatment time of 2 hours, the effluent TP can be discharged to the first-class A standard. When the treatment time reaches 3 hours, the effluent TP can be lower than 0.3mg / L. Realize the upgrading of phosphorus discharge.

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Abstract

The invention relates to a wastewater electrochemical enhanced treatment device and method. The device comprises a settling pool, a first electrolysis pool, a second electrolysis pool and a direct current power supply, wherein the settling pool is provided with a water inlet, the settling pool, the first electrolysis pool and the second electrolysis pool are sequentially connected through water flowing pipelines, and the second electrolysis pool is provided with a water outlet capable of being opened and closed; at least one pair of electrodes are arranged in the first electrolysis pool, and positive poles of all the pairs of the electrodes in the first electrolysis pool are made of magnesium or magnesium alloy materials; at least one pair of electrodes are arranged in the second electrolysis pool; and positive poles and negative poles of all the pair of the electrodes are electrically connected with an anode and a cathode of the direct current power supply respectively. The device iseasy to operate and has a good removal effect on nitrogen and phosphorus and organics; the device has good adaptability on treatment of various kinds of wastewater, and is not affected by fluctuationof the water quality and the water amount, and the biological activity; magnesium ammonium phosphate sediment generated in the treatment process can be recycled and serve as agricultural sustained release fertilizer, the pollution problem of nitrogen and phosphorus in the wastewater is solved, and meanwhile, waste recycling is facilitated.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a sewage electrochemical enhanced treatment device and method. Background technique [0002] The treatment effect of the traditional sewage biological treatment process is greatly affected by the quality of influent water and the activity of biological sludge, and it takes time and resources to domesticate and cultivate the activated sludge in the early stage of the biological treatment process to successfully start the bioreactor. For wastewater with large fluctuations in water quality and quantity, low-carbon sources and other nutritional imbalances, conventional biological treatment is not effective. At present, when the conventional biological treatment process fails to meet the standard, it is usually combined with chemical methods to enhance the removal effect of nitrogen and phosphorus. Generally, carbon sources are added to strengthen the biologic...

Claims

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Application Information

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IPC IPC(8): C02F9/06C01B25/45C05B7/00C02F101/16C02F101/30
CPCC01B25/451C02F1/46104C02F1/52C02F9/00C02F2001/007C02F2101/16C02F2101/30C02F2301/08C05B7/00
Inventor 曾晓岚丁文川陈亮蔡松柏郑良秋罗万申王健康张玉刘长兴
Owner CHONGQING UNIV
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