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Method and apparatus for treating water containing organic matter

A treatment device and treatment method technology, which is applied in water/sewage treatment, natural water treatment, non-polluted water treatment, etc., can solve the problems of unable to inhibit the reproduction of slime mold and obtain bactericidal effect, and achieve the prevention of biological fouling and stable treatment , The effect of reducing the concentration of TOC

Active Publication Date: 2010-08-18
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] In order to suppress the reproduction of the slime mold, it is considered to add a bactericide to the raw water, but most of the conventional bactericides such as sodium hypochlorite (NaClO) are removed in the activated carbon tower, so the cation exchange tower or softening tower at the rear of the activated carbon tower The bactericidal effect cannot be obtained in the medium, and the reproduction of slime mold cannot be inhibited

Method used

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  • Method and apparatus for treating water containing organic matter
  • Method and apparatus for treating water containing organic matter
  • Method and apparatus for treating water containing organic matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] Chloramine T is added to industrial water containing 1mg / LasC TOC to make the combined chlorine concentration 5mg-Cl 2 / L, and then carry out coagulation filtration treatment under the conditions of PAC (polyaluminum chloride) addition amount 10mg / L, pH 6. Take SV20hr -1 The coagulation and filtration treatment water is passed into the activated carbon tower under the condition of 60L / hour of water flow and 80% recovery rate to the RO membrane separation device (manufactured by Nitto Denko, ultra-low pressure aromatic polyamide type RO membrane "ES- 20") through water. The pH of RO feed water is 5.5.

Embodiment 2-5

[0098] Chloramine T is added to industrial water containing 1mg / LasC TOC to make the combined chlorine concentration 0.5mg-Cl 2 / L (Example 2), 0.8mg-Cl 2 / L (Example 3), 1mg-Cl 2 / L (Example 4) or 3mg-Cl 2 / L (embodiment 5), except that it was processed under the same conditions as in Example 1.

Embodiment 6-9

[0100] Chloramine T is added to C drainage with TOC 1mg / Las to make the combined chlorine concentration 1mg-Cl 2 / L, and then carry out coagulation filtration treatment under the conditions of PAC addition 10mg / L and pH6. Take SV10hr -1 (Example 6), SV15hr -1 (Example 7), SV20hr -1 (Example 8) or SV30hr -1 The conditions of (embodiment 9) pass the coagulation filtration treatment water into activated carbon, and process under the same conditions as in embodiment 1 except this.

[0101]

[0102] In Example 1 and Comparative Example 1, the number of viable bacteria at each point was investigated, and the results are shown in Table 1.

[0103] [Table 1]

[0104]

Example 1

Comparative example 1

The fungicide used

Chloramine T

NaClO

Activated carbon feed water

ND

ND

activated carbon water treatment

ND

5×10 3 pcs / ml

RO feed water

ND

4×10 3 pcs / ml

RO concentrated water

ND

2×10 5 p...

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Abstract

A method and apparatus for treating water containing organic matter that would inhibit any microbial multiplication in active carbon column and reverse osmosis membrane separator and attain stable treatment over a prolonged period of time in the flow including active carbon treatment and post-stage RO membrane separation treatment of an ultrapure water production system for use in electronic device manufacturing plants. The method for treating water containing organic matter comprises the oxidizer addition step of adding an oxidizer to water containing organic matter; the active carbon treatment step of treating the water containing organic matter having undergone the oxidizer addition step with active carbon; and the reverse osmosis membrane separation step of passing the water containing organic matter having undergone the active carbon treatment step through reverse osmosis membrane separating means, wherein a chlorinated oxidizer is used as the oxidizer.

Description

technical field [0001] The present invention relates to a system for preparing ultrapure water used in electronic equipment manufacturing factories, a method and a treatment device for treating water containing organic matter suitable for use in wastewater treatment equipment in electronic equipment manufacturing factories. Background technique [0002] In electronic equipment manufacturing plants, ultrapure water is used as washing water. Ultrapure water is industrial water or wastewater discharged from the factory as raw water, and it passes through a process that usually includes activated carbon treatment and post-stage reverse osmosis (RO) membrane separation treatment. preparation. [0003] The purpose of activated carbon treatment is to remove oxidants or organic matter, chroma, etc. in raw water. In the activated carbon, the organic matter is adsorbed and concentrated, so the organic matter is used as a nutrient source, and an environment where microorganisms are ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44B01D61/04C02F1/28C02F1/42C02F1/50C02F1/76C02F5/00C02F5/08C02F5/12C02F5/14C02F9/00
CPCC02F1/66C02F1/76B01D61/08C02F2303/185C02F2001/425C02F5/10B01D2311/04C02F2303/20C02F2103/04C02F1/283B01D61/025C02F1/441C02F9/00C02F2103/346C02F1/28C02F1/56B01D2311/26B01D2311/2626
Inventor 育野望
Owner KURITA WATER INDUSTRIES LTD