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Cleaning plastic produced by sewage treatment using polyacrylamide and polyaluminum chloride

2022-12-24 15:41:02

With the rapid development of plastic factory, plastic factory industrial wastewater will follow. It is different from waste plastic products, can be directly recycled. Waste water from plastics plants needs to be rigorously treated before it can be discharged or recycled. Unsolved immediate discharge will cause great harm to the surrounding environment.

The industrial wastewater discharged by plastic plant belongs to organic chemical wastewater, which can be generally divided into workshop processing water and cleaning water two categories. Workshop process water refers to the waste water produced in the production and processing of plastic products, and the waste lost in the processing process. Its chemical composition is complex and relatively difficult to solve.

Recycled plastics in express sorting, laser cutting, crushing, granulation process need to apply a lot of cleaning water, waste water discharge instantaneous flow, high content of accumulated material, with various specifications of plastic fragments and debris, by the use of plastic original harm, wastewater in laser cutting, cleaning process is more complex.

Cationic polyacrylamide PAM

Cleaning plastic produced by sewage treatment using polyacrylamide and polyaluminum chloride, under normal circumstances, the two can not be dissolved together, should be in accordance with a certain proportion of dissolution separately dissolved into solution. Because the solution ratio of poly (propylene) and poly (aluminum) is different, polyacrylamide is generally diluted solid to 0.1% concentration before use, and poly (aluminum chloride) is diluted to 10% solution after use. Due to the reaction itself, if the two dissolve together, it will affect the use effect between them.

The adding sequence of polyacrylamide and polyaluminum chloride is generally to add polyaluminum chloride flocculant first, fully react with sewage, and then add polyacrylamide to assist precipitation, so as to play the best effect of the two, improve the treatment rate of water treatment, reduce the cost of treatment.

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