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Ozonation based compound type reverse osmosis concentrated water treatment method

A technology of reverse osmosis concentrated water and ozone oxidation, applied in the direction of oxidized water/sewage treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of high content, low COD removal efficiency, complex components, etc., to overcome the treatment high cost effect

Inactive Publication Date: 2018-10-16
广州市恩莱吉能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the field of sewage treatment, due to the high content of pollutants and complex components in water, the removal efficiency of COD is low, and it can only be used as pretreatment of biochemical treatment (improve biodegradability) or for some other purposes in some projects. (such as printing and dyeing wastewater decolorization)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0033] A kind of composite reverse osmosis concentrated water treatment method based on ozone oxidation, comprises the following steps:

[0034] (1) The pH of the water body of the sewage to be treated is adjusted to be less than 2, then utilize air to aerate the sewage to be treated, then enter step (2), wherein:

[0035] The aeration time is 5 minutes, and the aeration rate per ton of sewage to be treated is 200 cubic meters per hour;

[0036] (2) Keep the same aeration rate as step (1), feed air to the sewage to be treated, then adjust the pH value of the water body of the sewage to be treated to greater than 10, and then enter step (3);

[0037] (3), keep the same aeration rate as step (1), pass into air to the sewage to be treated, then add 30wt% hydrogen peroxide aqueous solution in the water body of the sewage to be treated, then enter step (4), wherein:

[0038] The ratio of the dosage (mg / L) of 30wt% hydrogen peroxide aqueous solution to the COD (mg / L) of the sewage ...

specific Embodiment 2

[0052] A kind of composite reverse osmosis concentrated water treatment method based on ozone oxidation, comprises the following steps:

[0053] (1) The pH of the water body of the sewage to be treated is adjusted to be less than 2, then utilize air to aerate the sewage to be treated, then enter step (2), wherein:

[0054] The aeration time is 30 minutes, and the aeration rate per ton of sewage to be treated is 10 cubic meters per hour;

[0055] (2) Keep the same aeration rate as step (1), feed air to the sewage to be treated, then adjust the pH value of the water body of the sewage to be treated to greater than 10, and then enter step (3);

[0056] (3), keep the same aeration rate as step (1), pass into air to the sewage to be treated, then add 30wt% hydrogen peroxide aqueous solution in the water body of the sewage to be treated, then enter step (4), wherein:

[0057] The ratio of the dosage (mg / L) of 30wt% hydrogen peroxide aqueous solution to the COD (mg / L) of the sewage to...

specific Embodiment 3

[0071] A kind of composite reverse osmosis concentrated water treatment method based on ozone oxidation, comprises the following steps:

[0072] (1) The pH of the water body of the sewage to be treated is adjusted to be less than 2, then utilize air to aerate the sewage to be treated, then enter step (2), wherein:

[0073] The aeration time is 15 minutes, and the aeration rate per ton of sewage to be treated is 100 cubic meters per hour;

[0074] (2) Keep the same aeration rate as step (1), feed air to the sewage to be treated, then adjust the pH value of the water body of the sewage to be treated to greater than 10, and then enter step (3);

[0075] (3), keep the same aeration rate as step (1), pass into air to the sewage to be treated, then add 30wt% hydrogen peroxide aqueous solution in the water body of the sewage to be treated, then enter step (4), wherein:

[0076] The ratio of the dosage (mg / L) of 30wt% hydrogen peroxide aqueous solution to the COD (mg / L) of the sewage...

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PUM

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Abstract

The invention relates to an ozonation based compound type reverse osmosis concentrated water treatment method. The ozonation based compound type reverse osmosis concentrated water treatment method comprises (1) regulating the pH of the to-be-treated sewage to 2, then aerating in the air; (2) regulating the pH value of a water body of the to-be-treated sewage to more than 10; (3) adding 30 wt% hydrogen peroxide aqueous solution into the water body of the to-be-treated sewage; (4) stopping introducing air into the to-be-treated sewage, then implementing ultraviolet radiation, ozone aeration andpressure treatment for 0.5-6 hours at the same time, obtaining producing water with relatively low content of organic matters; (5) adding acid and alkali into the producing water, regulating the pH value to 6-9, and finishing the treatment of the sewage. The invention provides the second-pollution-free low-cost treatment method for treating the high-salinity high-organic pollutant concentration reverse osmosis concentrated water, the concentrated water is successfully treated and is discharged and recycled up to the standard; the ozone is used to oxidize, and no secondary pollution is caused.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a composite reverse osmosis concentrated water treatment method based on ozone oxidation. Background technique [0002] At present, reverse osmosis technology is used in many advanced treatment water reuse projects, and the problem of meeting the standard discharge of such reverse osmosis concentrated water is usually that the chemical oxygen demand (COD) exceeds the standard. This type of reverse osmosis concentrated water usually has a COD greater than 150ppm, a salt content of 10,000ppm to 100,000ppm, and a biodegradability of 0.1 to 0.2. Due to the high salinity and low biodegradability of this kind of water, biochemical treatment has basically no effect on it, and usually requires other physical or chemical treatment methods to solve it. [0003] The above sewage is usually treated by concentration separation method, activated carbon adsorption method or advanced...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/08
CPCC02F1/32C02F1/722C02F1/78C02F9/00C02F2201/782C02F2209/08C02F2301/08
Inventor 郑吉斯
Owner 广州市恩莱吉能源科技有限公司