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Method of treating wastewater containing organic compound

A treatment method and waste liquid technology, applied in the direction of biological water/sewage treatment, special treatment targets, chemical instruments and methods, etc., can solve problems such as inability to fully eliminate scum, achieve low cost, eliminate warm waste changes, and stabilize treatment Effect

Inactive Publication Date: 2012-09-12
IBIDEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has also been reported that when scum occurs, the scum treatment can be improved by adding a large amount of alanine, magnesium sulfate, soluble silicic acid, and silicate relative to the drainage volume to be treated, but if the water temperature rises, the above method still cannot Fully eliminate scum (see Non-Patent Document 2)
According to the same document, there has not been a decisive solution to deal with low-temperature operation, high-temperature operation, abnormal conditions of treated water, scum generation, foam, and sludge expansion at any time.

Method used

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  • Method of treating wastewater containing organic compound
  • Method of treating wastewater containing organic compound
  • Method of treating wastewater containing organic compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] Activated sludge is used to treat the degreasing agent-containing waste liquid discharged from electroplating factories and printing factories as follows.

[0126] The degreaser-containing waste liquid contains at least dipropylene glycol ether, alkylbenzimidazole, benzimidazole derivatives, diethylene glycol monobutyl ether, monoethanolamine, polyoctylphenyl ether, isopropanol, ethylene glycol , N, N'-dimethylformamide, etc.

[0127] For the degreasing agent-containing waste liquid, its biochemical oxygen demand (BOD), chemical oxygen demand (COD), total nitrogen and total phosphorus were measured respectively. The BOD uses a trade name: DO Meter-OM 12 (manufactured by Horiba Manufacturing Co., Ltd.), and the amount of dissolved oxygen in the sample after culturing for 5 days and the amount of dissolved oxygen in the sample before culturing are measured by conventional methods. Numerical calculation of dissolved oxygen before and after cultivation. This COD is evalua...

Embodiment 2

[0157] The isolated IBI-2P, IBI-3P, IBI-6P, IBI-15P, IBI-40P and IBI-6 were cultured separately. Next, in the above-mentioned Example 1, the obtained IBI-2P, IBI-3P, IBI-6P, IBI-15P, IBI-40P and IBI-6 were used instead of the activated sludge. liquid is processed.

[0158] As a result, one week later, treated water meeting the water discharge standards (BOD: 130 ppm, COD: 245 ppm, total nitrogen: 75 ppm, and total phosphorus: 15 ppm) was obtained at a residence time of 42 hours. The abundance ratio (cell number ratio) of the above-mentioned IBI-2, IBI-3P, IBI-6P, IBI-15P, IBI-40P and IBI-6 is about 1:1:1:1:1:1. According to the waste liquid containing degreasing agent, take IBI-6 as 100, IBI-2P is about 20-50, and the above-mentioned IBI-3P, IBI-6P, IBI-15P and IBI-40P show the degree of stability within the fluctuation of about 1-10 .

Embodiment 3

[0163] Activated sludge is used to treat waste liquid containing degreasing agents discharged from electroplating factories and printing factories as follows.

[0164] The above-mentioned degreasing agent-containing waste liquid contains at least dipropylene glycol ether, alkylbenzimidazole, benzimidazole derivatives, diethylene glycol monobutyl ether, monoethanolamine, polyoctylphenyl ether, isopropanol, ethylene glycol , N, N'-dimethylformamide, ethylene glycol, etc.

[0165] Biochemical oxygen demand (BOD), chemical oxygen demand (COD), total nitrogen and total phosphorus were measured for the waste liquid containing degreasing agent. The above-mentioned BOD is calculated as follows according to a conventional method: using a trade name: DO Meter-OM 12 (manufactured by Horiba Manufacturing Co., Ltd.), the amount of dissolved oxygen in the sample after culturing for 5 days and the amount of dissolved oxygen in the sample before culturing The measurement was performed, and c...

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Abstract

The invention provides a method of treating an organic substance-containing waste liquid, and a treatment apparatus therefor, and an additive for treating an organic substance-containing waste liquid, and a bacterium for degrading an organic substance component or the like in the waste liquid, capable of accomplishing at least one of treatment of the organic substance-containing waste liquid with a high efficiency and a high treatment rate, without substantially generating a foul odor, and obtainment of water quality that is suitable for releasing to sewage, a public water area, or the like.The method of treating an organic substance-containing waste liquid, and the treatment apparatus therefor each characterized by contacting an activated sludge containing a specified bacterium and an organic substance-containing waste liquid. The invention also provides an additive for treating an organic substance-containing waste liquid, comprising adding the additive to an activated sludge in a treatment tank in which a specified bacterium is present, and a specified bacterium for degrading an organic substance-containing waste liquid.

Description

[0001] This application is a divisional application of an invention patent application whose application date is April 21, 2006, and whose application number is 200910141762.2, and whose invention name is the same as the present invention. technical field [0002] The invention relates to a treatment method for waste liquid containing organic matter, a processing device thereof, bacteria, microorganism culture and additives for treating waste liquid containing organic matter. Background technique [0003] Waste liquids such as electroplating waste liquids and printed wiring board cleaning waste liquids contain a large amount of organic substances such as higher alcohols, sulfur compounds, alkyl thiosulfate compounds, nitrogen-containing alkyl compounds, phosphoric acid compounds, and the like. In the past, this organic matter-containing waste liquid was treated by, for example, the following methods: by steam heating the organic matter-containing waste liquid, water is separa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/34C12S99/00
CPCC02F3/34C02F2303/12C02F3/12C12N1/20
Inventor 入江镣三田端三千雄日比庆久
Owner IBIDEN CO LTD
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