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Method of treating wastewater containing organic compound

A treatment method and technology for waste liquid treatment, which can be used in sustainable biological treatment, biological water/sewage treatment, chemical instruments and methods, etc. Effect

Inactive Publication Date: 2007-09-05
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
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  • Method of treating wastewater containing organic compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0123] Activated sludge is used to treat the degreasing agent-containing waste liquid discharged from electroplating factories and printing factories as follows.

[0124] 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.

[0125] 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

[0155] 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.

[0156] 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 at 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

[0161] Activated sludge is used to treat waste liquid containing degreasing agents discharged from electroplating factories and printing factories as follows.

[0162] 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.

[0163]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 ca...

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Abstract

The present invention provides a method for treating waste liquid containing organic substances, which can treat waste liquid containing organic substances at high efficiency and high speed, produce not odor during the treatment, and obtain waste liquid containing organic substances that has water quality at least suitable for discharging to sewage system or public water areas; the present invention further provides a waste liquid treatment device, an additive for treatment of waste liquid containing organic substances, and bacteria that can decompose waste liquid containing organic substances. The method and device for treating waste liquid containing organic substances are characterized in: they can force activated sludge containing specific bacteria to contact with the waste liquid containing organic substances. The present invention further provides an additive that can be added to the active sludge in a treatment pond where specific bacteria exist to treat waste liquid containing organic substances, and specific bacteria that can decompose waste liquid containing organic substances.

Description

technical field [0001] 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 [0002] 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 separated in the form of distilled water (for example, referring to Patent Document 1); or in the presence of chloride ions, the organic matter-containing waste liquid is subjected to Electrolytic oxidation treatment and precipitation recovery tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/20C02F3/34C02F3/12C12S13/00C12S99/00
CPCY02W10/10
Inventor 入江镣三田端三千雄日比庆久
Owner IBIDEN CO LTD
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