Treating method and treating apparatus of waste water containing organic material

A treatment method and treatment device technology, applied in water/sewage treatment, water treatment parameter control, neutralization water/sewage treatment, etc., to achieve the effect of preventing reactivity reduction and reducing load

Active Publication Date: 2012-12-05
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, since the anti-scaling agent cannot pass through the RO membrane, it is concentrated on the concentrated water side

Method used

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  • Treating method and treating apparatus of waste water containing organic material
  • Treating method and treating apparatus of waste water containing organic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0097] Use the waste water with a TOC concentration of 5 mg / L and a calcium ion concentration of 10 mg / L as raw water with surfactants as the main body. figure 1 The device shown performs processing. First, add an EDTA-based anti-scaling agent (ethylenediaminetetraacetic acid sodium salt) to the raw water in an amount that is 5 times the calcium ion concentration of the raw water. Then, add NaOH to make the pH 10.5, and use the RO membrane separation device (day The low-pressure aromatic polyamide RO membrane "ES-10" manufactured by Toden Kogyo Co., Ltd. is subjected to RO membrane separation treatment under the conditions of a water flow rate of 80 L / h and a recovery rate of 75%.

[0098] After adding 1.2 times the amount of hydrogen peroxide to TOC to the RO concentrated water obtained by the RO membrane separation treatment, ozone was added to the amount of 10 times the TOC. Then, water was passed to the activated carbon tower under the condition of SV 10 / h, and then the effl...

Embodiment 2

[0101] Except that hydrogen peroxide was not added to the RO concentrated water, the treatment was carried out in the same manner as in Example 1, and the pH, TOC concentration and TOC removal rate of the ozone-treated water (the effluent water of the ozone reaction tower) and the effluent water of the activated carbon tower were studied. The results of pH, TOC concentration, and TOC removal rate, as well as the pH, TOC concentration, and TOC removal rate of the treated water (the effluent water of the ion exchange tower) are shown in Table 1.

Embodiment 3

[0103] Except that the amount of alkali added was increased so that the pH of the ozone-treated water reached 10, the treatment was carried out in the same manner as in Example 1, and the pH, TOC concentration, and TOC removal rate of the ozone-treated water (the effluent water of the ozone reaction tower) were studied, and Table 1 shows the pH, TOC concentration, and TOC removal rate of the effluent water of the activated carbon tower, and the pH, TOC concentration, and TOC removal rate of the treated water (the effluent water of the ion exchange tower).

[0104] Table 1

[0105]

[0106] It can be seen from Table 1 that according to the present invention, TOC in RO concentrated water can be highly removed. Possibility of industrial application

[0107] The present invention can be effectively used in water treatment for the discharge or recovery and reuse of waste water containing high to low concentration TOC discharged from the field of electronic equipment manufacturing, semico...

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PUM

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Abstract

The invention provides a treating method of waste water containing organic material, which can prevent flux reduction and bio contamination resulted from organism adsorbing on membrane in RO membrane separation device, when trating and recovering the RO membrane separation device for waste water containing organic material, and can effectively reduce the TOC value containing COD value of RO concentrated water, and prevent adverse effect such as effluent treatment of RO concentrated water. In the said method, the scale inhibitor is added into the waste water containing organic material, and the base reagent is added to ajust the pH to above 9.5, and then the water goes through the RO membrane separation device. The RO concentrated water is trough ozone oxidation in ozone reaction tower. The pH of RO feed water is adjusted to above 9.5 to prevent bio contaminating in the RO membrane separation device, nonionic surfactant adsorbing on membrane, and flux reducting. The scale inhibitor isadded to inhibit membrane jamming due to calcium carbonate sacling at high pH. The concentrated TOC containing COD in RO concentrated water is taken away trough ozone oxygenolysis.

Description

Technical field [0001] The present invention relates to a reverse osmosis (RO) membrane separation device for treatment and recovery of wastewater containing high to low concentration organic matter (TOC) discharged from electronic equipment manufacturing plants, etc., to prevent organic matter from adsorbing on the membrane surface in the RO membrane separation device The resultant flux reduction or biological pollution leads to long-term stable treatment, and effectively reduces the TOC concentration in the water to obtain high-quality treated water. In addition, it is easy and effective to treat the concentrated water content of the RO membrane separation device. Organic wastewater treatment method and treatment device. Background technique [0002] In recent years, environmental standards and water quality standards have become more and more stringent, and high-level purification is also desired for discharged water. On the other hand, for the purpose of eliminating water sh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F5/00C02F1/44C02F1/66C02F1/78
CPCB01D61/025C02F1/441C02F1/66C02F1/78C02F2201/002C02F2209/06
Inventor 牛山妙子育野望
Owner KURITA WATER INDUSTRIES LTD
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