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Resourceful treatment process for alkali-minimization waste water

A technology of alkali reduction wastewater and treatment process, applied in the field of water treatment, can solve problems such as poor biodegradability, impact, and deterioration of effluent water quality, and achieve the effect of saving treatment costs

Inactive Publication Date: 2015-09-23
宁波沐德环境科技有限公司
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  • Abstract
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Problems solved by technology

However, since the alkali reduction wastewater contains a large amount of organic matter with poor biodegradability and relatively high salt content, mixing it into the conventional dyeing and finishing wastewater biochemical treatment system will have a certain impact on it, resulting in the overall treatment effect being affected and the effluent quality deteriorating

Method used

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  • Resourceful treatment process for alkali-minimization waste water

Examples

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Embodiment 1

[0028] The water quality of the alkali reduction waste water to be treated is as follows:

[0029] serial number

[0030] Wastewater is treated through the following steps: (such as figure 1 shown)

[0031] (1) Alkali decrement wastewater is discharged into the adjustment pool 1 separately, and the residence time in the adjustment pool 1 is 20 hours; after adding 98% of the concentrated sulfuric acid, the waste water is discharged into the acid analysis pool 2, so that it enters the acid analysis pool 2 The pH of the waste water is controlled below X, and the residence time of the waste water in the acid analysis tank is 5-8 hours;

[0032] (2) The supernatant in the acid analysis tank 2 is discharged into the follow-up high-efficiency catalytic oxidation system 4; the terephthalic acid precipitate at the bottom of the acid analysis tank is transported by a pump into the plate and frame filter press 3 for pressure filtration, and terephthalic acid is recovered Part...

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Abstract

The invention discloses a resourceful treatment process for alkali-minimization waste water. The resourceful treatment process is used for recycling terephthalic acid which is difficult to be degraded, is capable of reducing treatment cost, and is combined with an efficient oxidation technology and a bioaugmentation technology for aerobic degradation of organic matters which cannot be degraded in a biochemistry manner; the possibility that waste water is degraded in the biochemistry manner is realized; high-salt resistant bacteria are introduced into the bioaugmentation technology, so that the problem that high-salt alkali-minimization waste water is difficult to be degraded in the biochemistry manner is solved; the process effluent CODcr is controlled to be less than 200 mg / L; the problem that single alkali-minimization waste water treatment cannot reach the standard is effectively solved.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a recycling treatment process for alkali-reduced waste water. Background technique [0002] At present, polyester fiber has become an important raw material in the clothing industry. People use alkali weight reduction technology to endow polyester fiber fabrics with silky characteristics. With the increase of polyester fiber production in my country, polyester consumption accounts for about 50% of my country's textile market, and the national annual output of polyester fiber has reached 32.5741 million tons from January to November 2014. [0003] Alkali reduction process wastewater is produced in the polyester imitation silk alkali reduction process. Most of the polyester components dissolved and peeled off from the polyester fabric exist in the water in the form of terephthalic acid and ethylene glycol, and a small amount of oligomers with different degrees of polymeriz...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 周火陈鑫金艳
Owner 宁波沐德环境科技有限公司
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