Method for treating high-concentration water-based ink waste liquid and dehydrating sludge in high-concentration water-based ink waste liquid

A water-based ink, sludge dewatering technology, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, dehydration/drying/concentrated sludge treatment, etc., to achieve continuous production treatment, high dehydration efficiency, and dehydration speed. quick effect
CN105084576AActive Publication Date: 2015-11-25QINGDAO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
QINGDAO UNIV
Publication Date
2015-11-25

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Abstract

The invention discloses a method for treating high-concentration water-based ink waste liquid and dehydrating sludge in the high-concentration water-based ink waste liquid. The method is characterized by comprising the following steps: collecting the water-based ink waste liquid, pumping the collected water-based ink waste liquid into a reactor, then adding inorganic acid into the waste liquid, carrying out stirring and adjusting the pH value of the waste liquid until the waste liquid is acidic; allowing the sludge to enter and be located on a dehydration filter belt, heating the sludge with microwaves, carrying out squeezing and dehydration, and spraying water on the dehydrated sludge to rapidly cool the surface of the dehydrated sludge; and taking the sludge off the filter belt and discharging dehydration water into a subsequent waste water treating system. With the method provided by the invention, integrated removal of pollutants in the ink waste liquid and dehydration of the sludge is realized; the removal rate of the pollutants reaches more than 90%; a decolorization ratio is up to more than 99%; and the treated sludge has a water content of lower than 40%.
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Description

technical field

[0001] The invention belongs to the technical field of sewage and sludge treatment in environmental engineering, and in particular relates to a method for treating high-concentration water-based ink waste liquid and dewatering the sludge. Background technique

[0002] Water-based ink is widely used in various fields because of its health, environmental protection and safety characteristics. For example, packaging materials and waterproof materials usually use water-based ink when printing, but when changing the printing color, it is necessary to clean the printing machine and the ink storage tank, resulting in a certain amount of high-concentration water-based ink waste. The water-based ink waste liquid contains a large amount of organic pollutants such as water-soluble polymer resins, hydrophilic pigments, and organic solvents, and the pollution is extremely serious (the chroma is more than 30,000 times, and the COD Cr The value is as high as 200,000-600,00...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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