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A hydrogen peroxide synergistic biochemical treatment method simulating pva-containing printing and dyeing wastewater

A printing and dyeing wastewater and biochemical treatment technology, which is applied in textile industry wastewater treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem that wastewater is difficult to achieve the treatment effect, and the biochemical requirements of wastewater are high and difficult Large-scale application and other issues to achieve the effect of improving biochemical treatment efficiency, reducing pressure, and low operating costs

Active Publication Date: 2020-04-10
SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI +1
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Problems solved by technology

However, the cost of physical and chemical treatment alone is too high to be used on a large scale, and the biochemical treatment alone has high requirements for the biodegradability of wastewater itself, and it is difficult to achieve the ideal treatment effect for wastewater with low B / C.

Method used

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  • A hydrogen peroxide synergistic biochemical treatment method simulating pva-containing printing and dyeing wastewater
  • A hydrogen peroxide synergistic biochemical treatment method simulating pva-containing printing and dyeing wastewater

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Embodiment

[0032] According to survey statistics, the PVA content in the actual desizing wastewater is about 1-5g / L, and this wastewater accounts for 5%-15% of the comprehensive printing and dyeing wastewater, that is, the average PVA content in the comprehensive printing and dyeing wastewater is 300mg / L, while in the actual printing and dyeing industry There are many kinds of dyes, but more than 50% are azo dyes. In addition, the actual printing and dyeing wastewater is generally alkaline, and the pH value generally does not exceed 11. Based on the above factors, configure simulated printing and dyeing wastewater with a PVA content of 280-320 mg / L, an overall COD concentration of 800 mg / L, a B / C ratio of 0.2-0.23, a pH value of 7.5-8.0, and an azo dye reactive black B150 content of 8 mg / L. L, chroma 300-400 times.

[0033] The present invention uses hydrogen peroxide to synergistically biochemically treat the simulated printing and dyeing wastewater containing PVA, and its technological...

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Abstract

The invention belongs to the field of wastewater treatment, and discloses a hydrogen peroxide collaborative biochemical treatment method for simulating a PVA (polyvinyl acetate)-containing printing and dyeing wastewater treatment process. The method comprises the following steps: introducing simulated PVA-containing printing and dyeing wastewater into an anaerobic hydrolytic acidification system, and adding a proper amount of hydrogen peroxide; carrying out biochemical treatment on the wastewater collaboratively by using hydrogen peroxide; then sequentially putting into an aerobic tank and an advanced treatment pool; and finally discharging or reusing water meeting the standard. The hydrogen peroxide collaborative biochemical treatment method greatly improves the biochemical treatment efficiency, and an independent pretreatment unit is omitted; no secondary pollution such as chemical sludge is caused; and the pressure for subsequent sludge treatment is reduced.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and in particular relates to a hydrogen peroxide synergistic biochemical treatment method in the process of simulating the treatment of PVA-containing printing and dyeing wastewater. Background technique [0002] The textile printing and dyeing industry is a traditional pillar industry in my country, but it is also a traditional large pollutant discharger. The main characteristics of textile printing and dyeing wastewater are high COD and large chroma, mainly because impurities on the fibers, dyes, auxiliaries, and sizing materials enter the wastewater during the printing and dyeing process, and the COD contributed by the desizing wastewater accounts for the largest proportion of the comprehensive printing and dyeing wastewater. More than 60% of the color, while the chromaticity is mainly due to residual dyes. [0003] PVA (polyvinyl alcohol) is a water-soluble high molecular polymer. Because...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F101/34C02F103/30
CPCC02F3/30C02F2101/34C02F2103/30C02F2305/06
Inventor 唐嘉丽于广平吉世明岳秀刘竹寒
Owner SHENYANG INST OF AUTOMATION GUANGZHOU CHINESE ACAD OF SCI
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