Integrated electrolysis nitrogen and phosphorus removal wastewater treatment method

A waste water treatment and waste water technology, applied in water/sewage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of not being able to be removed at the same time, reducing the concentration of ammonia nitrogen in waste water, etc. Stable operation and obvious effect

Inactive Publication Date: 2009-10-07
SHANGHAI JIAO TONG UNIV
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AI Technical Summary

Problems solved by technology

After denitrification, the concentration of ammonia nitrogen in wastewater is significantly reduced, and the treatment efficiency is high, but phosphorus in water cannot be removed at the same time in this device

Method used

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  • Integrated electrolysis nitrogen and phosphorus removal wastewater treatment method
  • Integrated electrolysis nitrogen and phosphorus removal wastewater treatment method

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Experimental program
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Effect test

Embodiment 1

[0028] The project produces 10 tons of pig-raising wastewater every day. A small centralized pig farm. The treated raw water is the supernatant effluent from the septic tank. The main water quality index is the pH value of the solution 7.6, the soluble phosphorus concentration is about 200mg / L, and the ammonia nitrogen concentration is about 2000mg / L, TOC concentration is about 1500mg / L. To this end, build a 1.5m*1.5m*0.5m electrolytic cell, press figure 1 figure 2 As shown, a total of 8 pairs of electrodes are placed in two rows in the electrolytic cell 2, 4 pairs of electrodes in each row, each pair of electrodes is composed of iron plate electrodes 5 and graphite electrodes 4, the distance between the electrode pairs is 40mm, the iron plate electrodes The distance between 5 and the graphite electrode 4 is 15mm, the two sides of the tank are cones with an inclination of 30 degrees, and the bottom is equipped with a 2mm diameter pinhole PVC pipe for microporous aeration.

[002...

Embodiment 2

[0032] The project produces 2 tons of landfill leachate every day, the main water quality index pH is 5.6, the concentration of soluble phosphorus is about 60mg / L, the concentration of ammonia nitrogen is about 2100mg / L, and the concentration of COD is about 20,000mg / L. To this end, a 0.5m*0.5m*0.5m electrolytic cell was constructed, and two pairs of electrodes were placed in the electrolytic cell. The electrode pairs consist of iron plate electrodes and graphite electrodes. The distance between the electrode pairs is 40mm. The iron plate electrodes and graphite The distance between the electrodes is 15mm, the two sides of the tank are cones with an inclination of 30 degrees, and the bottom is equipped with a 2mm aperture pinhole PVC pipe for microporous aeration.

[0033] First, turn on the water inlet pump, and the sewage enters the electrolytic cell from the inlet pipe. After the water inlet is completed, electrolysis is carried out with the graphite electrode as the anode and ...

Embodiment 3

[0036] The project produces 20 tons of domestic sewage per day, the main water quality index solution pH is 6.3, the soluble phosphorus concentration is 3.2mg / L, the ammonia nitrogen concentration is 24.7mg / L, and the COD concentration is about 327.9mg / L. For this purpose, a 2.5m*1.5m*0.5m electrolytic cell was constructed, and two rows of 12 pairs of electrodes were placed in the electrolytic cell, each row consisting of 6 pairs of iron plate electrodes and graphite electrodes, the distance between the electrode pairs It is 40mm, the distance between the iron plate electrode and the graphite electrode is 15mm, the two sides of the tank are cones with an inclination of 30 degrees, and the bottom is equipped with a 2mm diameter pinhole PVC pipe for microporous aeration.

[0037] First, turn on the water inlet pump, and the sewage enters the electrolytic cell from the inlet pipe. After the water inlet is completed, the graphite electrode is used as the anode and the iron plate elect...

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Abstract

The invention relates to an integrated electrolysis nitrogen and phosphorus removal wastewater treatment method, which realizes to remove the nitrogenous and phosphorus nutrition salt and organic pollutants in wastewater in same electrolytic tank. The invention adopts graphite and iron plate as electrodes, alternates electrolysis phosphorus removal and electrolysis nitrogen removal process by alternating the electrode polarities to remove the nitrogenous and phosphorus nutrition salt and organic pollutants in wastewater. The invention performs optimization and integration according to the change characteristics of the parameters including electrolysis time, current density, pH value, pollutants removal rate in the electrolysis phosphorus removal and electrolysis nitrogen removal process, can remove the nitrogenous and phosphorus nutrition salt and organic pollutants in wastewater in high efficiency in short time without adding any medicament in the process, achieves the advantages of small occupation area, short treatment time and high pollutants removal efficiency.

Description

Technical field [0001] The invention relates to an integrated electrolytic denitrification and phosphorus removal wastewater treatment method, which is suitable for the treatment of various concentration ranges of nitrogen and phosphorus organic wastewater such as domestic wastewater, livestock and poultry breeding wastewater, landfill leachate, etc., and is to control the nitrogen and phosphorus nutrients in the wastewater. An efficient wastewater treatment method in which salt and organic matter enter natural waters belongs to the field of environmental engineering wastewater treatment. Background technique [0002] The nitrogen and phosphorus nutrients in wastewater are the main factors leading to the eutrophication of closed or semi-enclosed waters. How to remove nitrogen and phosphorus in wastewater is the main problem in controlling the eutrophication of water bodies. The traditional biological method has the disadvantages of long hydraulic retention time, large area, unsta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/461
Inventor 尚晓欧阳超王欣泽彭亢晋孔海南
Owner SHANGHAI JIAO TONG UNIV
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