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Organic sulfur compound containing water discharge apparatus

A treatment device and compound technology, applied in biological water/sewage treatment, water treatment parameter control, sustainable biological treatment, etc., can solve the problems of organic matter decomposability, poor decomposition rate, low decomposition rate, DMS treatment outflow, etc. The effect of reducing TOC, preventing short flow, and improving decomposition efficiency

Inactive Publication Date: 2010-03-24
KURITA WATER INDUSTRIES LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Like general activated sludge treatment equipment, if all the organic matter is decomposed by a single aeration tank, there is a danger that some of the organic matter will flow out in an insufficiently decomposed state due to the poor decomposition property and decomposition speed of the organic matter.
In particular, when DMSO is decomposed, it is expected that the decomposition speed from DMS to MM will be lower than the decomposition speed from DMSO to DMS, and the DMS will flow out without sufficient treatment.

Method used

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  • Organic sulfur compound containing water discharge apparatus
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  • Organic sulfur compound containing water discharge apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] exist figure 1 In the shown device, untreated water is injected into each aeration tank of the first to fourth aeration tanks 1 to 4 at a flow rate of 15 L / h each time to treat it. In addition, nitrogen and phosphorus were added to untreated water, and water was passed so that BOD:BOD:N:P=100:5:1 (weight ratio) was assumed to be 3 times TOC.

[0083] The water quality of the obtained treated water and the DMS concentration in the exhaust gas of each aeration tank were investigated, and the results are listed in Table 1.

Embodiment 2

[0085] use figure 2 In the shown device, untreated water is injected into the first to third aeration tanks 1 to 3 at a flow rate of 20 L / h each time, and it is treated in the same manner as in Example 1 except that, The water quality of the obtained treated water and the DMS concentration in the exhaust gas of each aeration tank are listed in Table 1.

Embodiment 3

[0087] picture image 3 As shown, in each of the aeration tanks 1 to 4, the apparent capacity is used to add a square sponge with a side length of 3mm according to 30% of the tank capacity, and each time the untreated Water is injected into the second to third aeration tanks 2 and 3, respectively, and the following water quality containing TMAH is supplied to the first aeration tank. In the untreated water, three times the TOC is assumed as BOD, Add phosphorus in the ratio of BOD: P=100: 1 (weight ratio), in addition, according to the mode identical with embodiment 1, it is processed, the water quality of the treated water that has obtained and each aeration tank exhaust DMS concentrations are listed in Table 1.

[0088] (Drainage including TMAH)

[0089] Soluble TOC: 32.8mg / L

[0090] TMAH: 53.8mg / L

[0091] Nitrogen by Keidel method: 12.3mg / L

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Abstract

To obtain water to be treated having an excellent water quality by reducing a generated order and also carrying out stable treatment by simple equipment when organic sulfur compound-containing drainage is treated by an apparatus placing two aerobic bio-reactors or more in series. Two or more aerobic bio-reactors 1 to 4 are connected in series and the organic sulfur compound-containing drainage isdistributed into two or more aeration tanks 1 to 4. Since BOD loads per reactor to be distributed are reduced by distributing the organic sulfur compound-containing drainage, an oxygen demand per reactor is reduced and a state of oxygen deficiency can easily be prevented even if a special aerator is not used. Accordingly, the odor caused by generating DMS and MM is reduced by providing a reducingatmosphere due to an oxygen shortage.

Description

technical field [0001] The present invention relates to a device for biologically treating wastewater of organic sulfur compounds containing DMSO (dimethyl sulfoxide), sulfonic acids, etc. A treatment device for treating waste water containing organic sulfur compounds to obtain good water quality. Background technique [0002] In recent years, DMSO has been widely used in semiconductor manufacturing processes and liquid crystal panel manufacturing processes. For example, in the liquid crystal panel manufacturing field, a cleaning agent obtained by adding DMSO to diethylene glycol monobutyl ether, 2-aminoethanol, 2,2-aminoethyl aminoethanol, etc. is used. Therefore, the treatment method of these waste water containing DMSO becomes important. [0003] Since DMSO is biodegradable, it is economical to perform biological treatment. However, if biological treatment is performed on wastewater containing DMSO, there is a problem of generating odor from the aeration tank and the tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/02
CPCY02W10/10C02F3/121C02F2101/101C02F2209/06C02F2209/22C02F2303/02
Inventor 田中伦明川胜孝博
Owner KURITA WATER INDUSTRIES LTD
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