A treatment method for high-concentration printing and dyeing desizing wastewater

A technology for desizing wastewater and treatment methods, which is applied in textile industry wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc. It can solve the problems of difficult to form sedimentation activated sludge, low COD removal rate, Poor degradability and other problems, to achieve the effect of simple structure, low infrastructure cost and high conversion rate

Active Publication Date: 2016-11-02
NANTONG DAHENG ENVIRONMENTAL ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Among them, the main pollutants in the desizing wastewater are PVA, carboxymethyl cellulose, surfactants and cloth hair, the water quality is single, the degradability is poor, the content of sulfate radicals (3-5g / l) and Alkali content (3-5g / l) makes it difficult to form activated sludge with good sedimentation performance during anaerobic treatment alone, and the COD removal rate is low
Relying on a single physical and chemical treatment process has become a bottleneck in the treatment of printing and dyeing wastewater

Method used

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  • A treatment method for high-concentration printing and dyeing desizing wastewater

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Effect test

Embodiment 1

[0025] Such as figure 1 Shown: the method of the present invention can ensure that the treated effluent reaches the standard stably, and has been successfully operated on many engineering examples. The specific process is as follows:

[0026] (a) After the wastewater passes through the grid, part of the suspended solids is removed and enters the regulating tank, and then enters the forced circulation UASB tank for anaerobic biological treatment. The sewage enters evenly from the bottom of the UASB reactor through the water distribution system, and flows upward through the reaction zone into the gas, solid and liquid separation zone, and finally into the sedimentation zone on the upper part of the upflow anaerobic sludge bed reactor UASB; The biogas is discharged from the reactor through the pipeline through the gas collection chamber.

[0027] (b) The wastewater after UASB anaerobic treatment enters the coagulation sedimentation tank. The specific treatment steps are: the wa...

Embodiment 2

[0032] (a) After the wastewater passes through the grid, part of the suspended solids is removed and enters the regulating tank, and then enters the forced circulation UASB tank for anaerobic biological treatment. The sewage enters evenly from the bottom of the UASB reactor through the water distribution system, and flows upward through the reaction zone into the gas, solid and liquid separation zone, and finally into the sedimentation zone on the upper part of the upflow anaerobic sludge bed reactor UASB; The biogas is discharged from the reactor through the pipeline through the gas collection chamber.

[0033] (b) The wastewater after UASB anaerobic treatment enters the coagulation sedimentation tank. The specific treatment steps are: the wastewater first enters the UASB for anaerobic biological treatment, which changes the properties of suspended solids in the wastewater, facilitates physical and chemical precipitation, and more effectively removes pollution in the wastewate...

Embodiment 3

[0038](a) After the wastewater passes through the grid, part of the suspended solids is removed and enters the regulating tank, and then enters the forced circulation UASB tank for anaerobic biological treatment. The sewage enters evenly from the bottom of the UASB reactor through the water distribution system, and flows upward through the reaction zone into the gas, solid and liquid separation zone, and finally into the sedimentation zone on the upper part of the upflow anaerobic sludge bed reactor UASB; The biogas is discharged from the reactor through the pipeline through the gas collection chamber.

[0039] (b) The wastewater after UASB anaerobic treatment enters the coagulation sedimentation tank. The specific treatment steps are: the wastewater first enters the UASB for anaerobic biological treatment, which changes the properties of suspended solids in the wastewater, facilitates physical and chemical precipitation, and more effectively removes pollution in the wastewater...

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Abstract

The invention discloses a treatment method for printing, dyeing and desizing wastewater with a high concentration. The innovation point of the invention is that the treatment method comprises the following steps: treating desizing wastewater in a UASB anaerobic pool, allowing effluent of the UASB anaerobic pool to successively enter a coagulation sedimentation pool, an aeration activated sludge reaction pool and a hydrolytic acidification pool, simultaneously carrying out denitrification, sulfur oxidation, sludge adsorption proliferation and sludge concentration in the hydrolytic acidification pool, recycling nitrate oxide in an aerobic pool so as to enable suspended particles in the effluent of the UASB anaerobic pool to be absorbed, discharging the clarified water into a contact oxidation pool, carrying out sedimentation, and discharging the clarified water when the clarified water reaches discharge standards. Compared with aerobic biological treatment technology, the treatment method provided by the invention has a higher energy efficiency ratio in the treatment of wastewater with the high concentration, can thoroughly degrade degradation-resistant organic pollutants in wastewater, reduces water concentration, improves biodegradability of pollutants in the wastewater and enhances treatment efficiency and effluent water quality standards.

Description

technical field [0001] The invention relates to a method for treating high-concentration printing and dyeing desizing wastewater, which belongs to the field of industrial wastewater treatment. Background technique [0002] Textile printing and dyeing wastewater has complex components, often containing a variety of dyes, high chroma, strong toxicity, poor degradability, large pH fluctuations, high concentration, and a large amount of wastewater. It is one of the more difficult industrial wastewater to treat. At present, the most efficient and effective treatment method recognized in the industry is microbial biochemical treatment. At present, the commonly used biochemical treatment methods are "hydrolytic acidification-aerobic", "anaerobic-anoxic-aerobic" and other biological treatment processes. Although these processes can meet the requirements of wastewater treatment to a certain extent, they are still common in general. There are many disadvantages. [0003] The current...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F103/30
Inventor 沈晓东陈建宋海云周志刚周爱霞李培黄振宇曹斌陈跃曹鑫杰
Owner NANTONG DAHENG ENVIRONMENTAL ENG CO LTD
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