The coagulation method for the treatment of papermaking wastewater requires the addition of a certain coagulant, which is usually also called a decolorizing flocculant for papermaking wastewater. Because coagulation sedimentation can remove suspended solids in wastewater, chemical sedimentation can decolorize.
Therefore, most of the impurities, colloids and pollutants in the wastewater can be precipitated and agglomerated by adding this chemical precipitation agent to the coagulation sedimentation tank, so as to achieve the effect of decolorization and destabilization, and the wastewater will be clear. Commonly used decolorizing flocculants mainly include polymer flocculants and microbial flocculants, and polymer flocculants include synthetic organic polymers, inorganic polymers, and natural organic polymers. It is clear that the decolorizing flocculant for papermaking wastewater is a synthetic high molecular polymer.
The waste water is usually treated by: screen → adjustment → sedimentation or air flotation → A/O or contact oxidation → secondary sedimentation tank → discharge. The decolorizing flocculant is used in the sedimentation tank, and has the characteristics of simple operation, high removal rate of COD, and can avoid secondary pollution.
There are many types of waste water in the paper industry. Even if it is the waste water of a production workshop, the treatment technology applied will be different. However, the same point of these wastewaters is high COD, high chroma, decolorization and reduction of COD, so they can be simply treated with decolorizing flocculants for papermaking wastewater, and then cooperate with different processes to allow water recycling enterprises to use or meet the discharge standards. Perform inline. When the quality of the wastewater and the treatment process are different, it is related to the dosage and model selection of the decolorizing flocculant. Therefore, it is recommended to conduct a small sample trial before using it on the machine to determine the model and dosage(many of our products have free samples, so as to provide more accurate data and better guarantee for on-site use.
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Post time: Jul-29-2022