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Device and method for removing reverse osmosis concentrated water organic matter and ammonia nitrogen at same time

A technology for reverse osmosis concentrated water and organic matter, which is applied in chemical instruments and methods, water/sewage treatment, water treatment parameter control, etc., to achieve the effects of high removal efficiency, high degree of automation, and strong operability

Pending Publication Date: 2019-01-25
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the treatment methods of concentrated reverse osmosis water mainly include coagulation precipitation, activated carbon adsorption, ozone oxidation, chemical Fenton, photocatalysis and electrocatalysis, etc. Most of these methods are aimed at the removal of organic matter in reverse osmosis concentrated water, and rarely involve ammonia nitrogen. remove

Method used

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  • Device and method for removing reverse osmosis concentrated water organic matter and ammonia nitrogen at same time
  • Device and method for removing reverse osmosis concentrated water organic matter and ammonia nitrogen at same time
  • Device and method for removing reverse osmosis concentrated water organic matter and ammonia nitrogen at same time

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The reverse osmosis concentrated water output of a coking plant is 60m3 / h, the COD is about 310mg / L, and the ammonia nitrogen is about 14mg / L. Applying the device of the present invention, using a separate catalytic ozone oxidation treatment process, the catalyst is γ-Al 2 o 3 Load manganese-copper oxide, catalyze the oxidation reaction for 3 hours, do not add chemicals, and the ozone concentration is 330mg / L. The effluent COD is lower than 80mg / L and ammonia nitrogen is lower than 1.0mg / L. The average removal rates of COD and ammonia nitrogen are respectively are 78.3% and 95.2%, and the specific water quality indicators are shown in Table 1.

[0026] Table 1 Comparison of water quality indicators before and after reverse osmosis concentrated water treatment in a coking plant

[0027]

Embodiment 2

[0029] The production wastewater of a food factory is treated by the sewage treatment plant in the factory, and the biochemical effluent is reused after being treated by filtration, ultrafiltration, RO and other processes, and the reverse osmosis concentrated water produced is 160m 3 / h, COD is about 100mg / L, and ammonia nitrogen is about 15mg / L. Applying the device of the present invention, using catalytic ozone oxidation coupling persulfate oxidation treatment process, the catalyst is γ-Al 2 o 3 Load manganese-cerium oxide, react for 0.5h, add sodium persulfate at 30mg / L, ozone at 60mg / L, effluent COD less than 40mg / L, ammonia nitrogen less than 5.0mg / L, COD and ammonia nitrogen The removal rates were 60.1% and 71.3%, respectively, and the specific water quality indicators are shown in Table 2.

[0030] Table 2 Comparison of water quality indicators before and after reverse osmosis concentrated water treatment in a food factory

[0031]

Embodiment 3

[0033] The main sources of COD in the production wastewater of a titanium dioxide production plant are: reducing substances produced in the production process; organic substances brought in from carbide slag; SO 2 Wait. The volume of reverse osmosis concentrated water wastewater is 400m 3 / h, COD is about 200mg / L, and ammonia nitrogen is about 30mg / L. The device of the present invention is applied, and the catalytic ozone oxidation coupled hypochlorite oxidation treatment process is adopted, and the catalyst is γ-Al 2 o 3 Loading manganese-copper oxide, reacting for 3 hours, sodium hypochlorite dosage concentration is 40mg / L, ozone dosage concentration is 450mg / L, effluent COD is lower than 50mg / L, ammonia nitrogen is lower than 5.0mg / L, the removal rate of COD and ammonia nitrogen They are 79.1% and 70.4% respectively, and the specific water quality indicators are shown in Table 3.

[0034] Table 3 Comparison of water quality indicators before and after reverse osmosis co...

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Abstract

The invention relates to a device and method for removing reverse osmosis concentrated water organic matter and ammonia nitrogen at same time, and belongs to the field of industrial wastewater treatment. In an adjusting pool, reverse osmosis concentrated water is injected into the bottom of a catalysis ozone reaction tower through a water pump, a chemical adding pump pumps chemicals in a chemicaladding box into the bottom of the catalysis ozone reaction tower, and meanwhile ozone generated by an ozone generator is injected into an aeration disc at the bottom of the catalysis ozone reaction tower; the chemicals, the reverse osmosis concentrated water and ozone are mixed at the bottom to be introduced into a catalyst bed layer, water overflowing occurs on the upper portion of the catalysisozone reaction tower, overflowing water enters a deoxidization stabilization pool, tail gas of the catalysis ozone reaction tower is collected and enters a tail gas breaking device to break residua ozone, and finally the tail gas is discharged into atmosphere. The organic matter and ammonia nitrogen in the reverse osmosis concentrated water are removed at the same time through a catalytic ozonation reaction or catalytic ozonation and a persulfate or hypochlorite oxidation coupling reaction. The device is simple, high in automation degree and high in operability; the treated water outlet concentration can meet the demand for up-to-standard discharge or further treatment.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment, in particular to a device and method for simultaneously removing organic matter and ammonia nitrogen in reverse osmosis concentrated water. Background technique [0002] Reverse osmosis is a treatment technology that uses pressure to make water in a solution pass through a reverse osmosis membrane to achieve separation, extraction, purification, concentration, etc. It can not only remove salts and other ionic substances, but also remove organic matter, colloids, and bacteria. and viruses. Compared with traditional water treatment methods, reverse osmosis technology, as a water treatment process, has the advantages of cost-effectiveness, easy operation, no need to add acid and alkali, and small footprint. It is more and more widely used in the field of industrial water treatment. After the wastewater is treated by reverse osmosis, 80% to 85% of the influent water is converted into c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F1/76C02F1/78
CPCC02F1/722C02F1/725C02F1/76C02F1/78C02F2209/14C02F2209/08
Inventor 徐晓晨王叶鑫
Owner DALIAN UNIV OF TECH
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