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Reverse osmosis concentrated water treatment method

A technology for reverse osmosis concentrated water and a treatment method, which is applied in the field of comprehensive treatment of industrial wastewater, can solve the problems of increasing the cost of wastewater treatment and prolonging the reaction time of ozone oxidation, and achieves the advantages of enhancing the effect of the oxidation reaction, reducing the treatment cost and reducing the oxidation reaction time. Effect

Active Publication Date: 2014-07-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For reverse osmosis concentrated water, to directly treat organic pollutants in wastewater below the discharge standard by catalytic oxidation method, it is necessary to prolong the reaction time of ozone oxidation, which undoubtedly increases the cost of wastewater treatment

Method used

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  • Reverse osmosis concentrated water treatment method

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Experimental program
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Effect test

Embodiment 1

[0031] The reverse osmosis concentrated water of a biochemical standard wastewater reuse unit in an oil refinery, the wastewater quality characteristics are: COD 128mg / L, pH8.5, conductivity 8020μS / cm, Ca 2+ 107mg / L, turbidity 2.5NTU, BOD 5 0mg / L. The waste water is treated as follows:

[0032] Step 1: The wastewater is pumped into the heterogeneous catalytic oxidation tower, and the tower is filled with a loaded catalyst KH-SC-B [produced by Pingxiang Kehuan Environmental Engineering Co., Ltd., the catalyst composition is (Wt%): O 55.50%, Al 9.25%, Si 18.65%, K 2.22%, Ca 0.85%, Ti0.58%, Fe 8.13%, Cu 4.82%]. The amount of catalyst is half the height of the tower. The operating conditions are: the oxidation time is 30 minutes, and the ozone concentration in the wastewater is 11mg / L. Under these operating conditions, the COD of the product water is 68mg / L, and the turbidity is 2.5NTU;

[0033] Step 2: Catalytic oxidation effluent enters the adsorption reaction pool, and coa...

Embodiment 2

[0036] Reverse osmosis concentrated water from a biochemical standard wastewater reuse unit in an oil refinery, the wastewater quality is characterized by COD 85mg / L, pH 8.21, conductivity 4130μS / cm, Ca 2+ 390mg / L, turbidity 2.0NTU, BOD 5 0mg / L. The waste water is treated as follows:

[0037] Step 1: First, the wastewater enters the catalytic oxidation tower, and the tower is filled with a loaded catalyst KH-SC-B [produced by Pingxiang Kehuan Environmental Engineering Co., Ltd., the catalyst composition is (Wt%): O 55.50%, Al9.25%, Si 18.65%, K 2.22%, Ca 0.85%, Ti0.58%, Fe8.13%, Cu 4.82%]. The amount of catalyst is half the height of the tower. The operating conditions are: the oxidation time is 40 minutes, and the ozone concentration in the wastewater is 10mg / L. Under these operating conditions, the COD of the produced water is 65mg / L, and the turbidity is 2.0NTU;

[0038] Step 2: Catalytic oxidation effluent enters the adsorption reaction pool, and coal-based powdered a...

Embodiment 3

[0041] The secondary reverse osmosis concentrated water of a biochemical standard wastewater reuse unit in an oil refinery, the wastewater quality characteristics are COD111mg / L, pH8.03, conductivity 6020μS / cm, Ca 2+ 646mg / L, turbidity 2.0NTU, BOD 5 0mg / L. The waste water is treated as follows:

[0042] Step 1: First, the wastewater enters the catalytic oxidation tower, and the tower is filled with a loaded catalyst KH-SC-B [produced by Pingxiang Kehuan Environmental Engineering Co., Ltd., the catalyst composition is (Wt%): O 55.50%, Al9.25%, Si 18.65%, K 2.22%, Ca 0.85%, Ti0.58%, Fe8.13%, Cu 4.82%]. The amount of catalyst is half the height of the tower. The operating conditions are: the oxidation time is 50 minutes, and the ozone concentration in the wastewater is 13mg / L. Under these operating conditions, the COD of the produced water is 65mg / L, and the turbidity is 2.5NTU;

[0043] Step 2: Catalytic oxidation effluent enters the adsorption reaction pool, and coal-based...

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Abstract

A reverse osmosis concentrated water treatment method comprises the following steps: (1) adopting multi-phase catalytic oxidation technique to achieve deep oxidation and maximally remove organic pollutants in wastewater; (2) adding the effluent after catalytic oxidation into an adsorption reaction tank, in which a proper amount of powdered active carbon is added, and fully reacting for a period of time by aeration or stirring and the like to adsorb organic pollutants in the wastewater, wherein the adsorption effect depends on the addition amount of the powdered active carbon; and (3) filtering the effluent after the adsorption reaction by submerged ultrafiltration to further improve the quality of the effluent, which can be discharged directly. According to the reverse osmosis concentrated water treatment method, the oxidation reaction time can be reduced and the oxidation reaction effect can be enhanced at the same time, and not only can the wastewater treatment effect be ensured but also the treatment cost is greatly lowered when the method is in combination with the powdered active carbon adsorption process. In addition, the method has the advantages of simple process flow and high operability, and is worth popularizing.

Description

technical field [0001] The present invention relates to the field of comprehensive treatment of industrial waste water, in particular to a treatment method for reverse osmosis concentrated water produced during the recycling process of petrochemical and biochemical sewage, slightly polluted water and surface water, which belongs to a method for the treatment of industrial refractory biodegradable waste water, specifically It is said that it is a treatment method of reverse osmosis concentrated water. Background technique [0002] In recent years, domestic reverse osmosis technology has made some progress in the application of sewage reuse, especially petrochemical enterprises are at the forefront, and have carried out a lot of research and development work in the field of industrial sewage reuse technology, and have made great progress . In recent years, with the increasingly stringent wastewater discharge standards in various parts of the country, the water quality of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/72C02F1/28C02F1/44
Inventor 龚小芝刘正万国晖彭海珠赵鹏侯秀华
Owner CHINA PETROLEUM & CHEM CORP
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