Method for recycling carbon fiber wastewater

A carbon fiber and waste water technology, applied in the field of water treatment, can solve the problems such as difficulty in discharging waste water up to standard, failure to achieve treatment effect, damage to microbial membrane, etc., and achieve the effect of significant degradation of organic matter, alleviation of water pollution, and improvement of ecological environment.

Inactive Publication Date: 2011-04-13
蓝星环境工程有限公司
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  • Application Information

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Problems solved by technology

The traditional view is that the wastewater contains a large amount of substances that are difficult to biochemically treat in previous projects, and the oligomers have strong adhesion, which will wrap the soft fillers in the anaerobic and aerobic tanks, destroy the microbial film, and lead to sewage treatment. Field processing efficiency drops sharply
The surfactant contained in

Method used

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  • Method for recycling carbon fiber wastewater
  • Method for recycling carbon fiber wastewater
  • Method for recycling carbon fiber wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] according to figure 1 The carbon fiber wastewater treatment and reuse process is used to manufacture carbon steel anti-corrosion treatment equipment and connect pipelines. The effective volume and hydraulic retention time of the pool are shown in Table 1. Prepare waste water (ie raw water) before treatment according to the material composition and concentration in Table 2, and its COD value is about 750mg / L.

[0019] Table 1 Overview of process units

[0020]

[0021] Table 2 Concentration of organic matter in raw water (unit: mg / L)

[0022]

[0023] The wastewater first enters the adjustment polymerization tank for treatment, and the pH value is adjusted to 5.2;

[0024] Introduce the effluent from the adjusted polymerization tank into the air flotation tank to remove suspended solids, and the residence time is 15 minutes;

[0025] The effluent from the air flotation tank is introduced into the biochemical system, and enters the anaerobic tank and the aerobic ...

Embodiment 2

[0030] The substance concentration in Example 1 was increased by 2 times, and the experiment was repeated according to the steps of Example 1 to obtain a COD value of 29 mg / L and an ammonia nitrogen value of 3 mg / L in the effluent.

Embodiment 3

[0032] The water produced in Example 2 enters the ultrafiltration+reverse osmosis system, wherein the ultrafiltration membrane adopts the UNA-620A membrane of Asahi Kasei, the cut-off diameter is 0.1 μm, and the design flux is 60L / (m 2 · h), the BW365-FR membrane of Dow was used for reverse osmosis, the COD in the effluent was not detected, and the ammonia nitrogen value was 0.5mg / L.

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Abstract

The invention relates to a method for recycling carbon fiber wastewater, comprising the following steps: firstly, pretreating the carbon fiber wastewater, then carrying out biochemical treatment on the pretreated carbon fiber wastewater which enters into a biochemical system, then processing the wastewater subject to biochemical treatment by an integrated process formed by an ozonation reactor and a biological activated carbon (BAC) filter, and removing a majority of salt ions by an ultrafiltration and reverse osmosis desalting system. After the wastewater is processed by the method, the recycled water can be applied to industrial production, thus providing an open source for carbon fiber industrial water, reducing water body pollution and improving ecological environment.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and in particular relates to a recycling treatment method of carbon fiber wastewater. Background technique [0002] The production of polyacrylonitrile-based carbon fiber mainly includes two processes: raw silk production and raw silk carbonization. The waste water produced includes four parts, namely the waste water of the raw silk device of the sodium thiocyanate process, the waste water of the raw silk device of the DMSO process, the waste water of the carbonization device and the domestic sewage of the factory area. The wastewater mainly contains formic acid, acrylonitrile and its polymers, DMSO, surfactants, tetramethylsuccinonitrile and other pollutants. [0003] There is a process for producing carbon fiber in one step. The traditional view is that the wastewater contains a large amount of substances that are difficult to biochemically treat in previous projects, and the oligomer...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30
Inventor 吉春红郭春禹薛绍武赵雪娜杨晓伟郑东晟谢静铭姜仁全洪玉梅
Owner 蓝星环境工程有限公司
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