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How to choose suitable polyacrylamide for the treatment of chemical wastewater?

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How to choose suitable polyacrylamide for the treatment of chemical wastewater?

December 21
19:06 2020

The key steps for the prevention of chemical wastewater treatment are the reform of manufacturing systems and facilities, the elimination of toxins, the prevention of wastewater disposal, systematic utilization and recycling. If waste water needs to be discharged according to various chemical industrial wastewater properties, quantity and efficiency specifications after treatment, the cmpany may take a different solution.

Wastewater Treatment Polyacrylamide Flocculant

Firstly, based on the form of particles in the water treatment plant, select the chargeability of polyacrylamide. Generally speaking, anionic polyacrylamide is used to trap inorganic particles in the inorganic chemical water treatment plant, and cationic polyacrylamide is used to capture organic particles. Of course, if people want to pick the right varieties of polyacrylamide, people require a lab test and a rolling test.

Secondly, people use the degree of ion to express the electrical charge density of polyacrylamide. This means that at least using polyacrylamide, the optimal maximum flocculation effect has resulted in a positive or negative charge of polyacrylamide. The degree of charge is correlated with the form of sludge, for municipal sewage, the charge density is normally determined by the organic content of the sludge, and the organic content is normally volatile, the greater the volatile content, the higher the ion polyacrylamide content.

Thirdly, the molecular weight of polyacrylamide: the choice of MW depends on the form of dewatering equipment and implies the length of the molecular chain. In the case of centrifugal dewatering machines, the higher molecular weight of polyacrylamide is stronger, so during the centrifugal dewatering project, flocs would have a lot of shear force. For filter dewatering machines, select a lower molecular weight to medium molecular weight polyacrylamide may meet the requirements, in addition, it can be well considered water features.

Then, the molecular structure of polyacrylamide: the chosen molecular structure of polyacrylamide depends on the desired dewatering properties. For cationic polyacrylamide, once the required molecular weight has been verified, if people choose linear-structured polyacrylamide for dehydration treatment, the dosage of polyacrylamide is small and can achieve good dewatering efficiency. If people choose polyacrylamide support structure, the dosage is mild, people can get better dewatering efficiency. And if people want a polyacrylamide network structure, the dosage is high and people will have unique drainage and shear strength properties.

In the method of chemical wastewater treatment, people also use cationic polyacrylamide, large molecular flocculant, PAC, FeCl3, alkali and so on. In flocculant collection, people also use medium and high amounts of ion cationic polyacrylamide for sludge dewatering and use anionic polyacrylamide for sewage flocculation and settlement.

If people have any questions about the the treatment of chemical wastewater, people can contact with Oubo chemical freely. Oubo Chemical has established a professional team to help the customers with their specific application of PAM. Our brand O’brien has been accepted by clients worldwide.

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