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Improving the Quality of Wastewater Treatment by Flocculation

机译：Improving the Quality of Wastewater Treatment by Flocculation

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Abstract—One of the most promising methods of industrial wastewater treatment is flocculation using polyacrylamides. The purpose of our research was to estimate the efficiency of the use of new types of polyacrylamide-based flocculants for industrial wastewater treatment. The objects of the study were wastewaters from the Saratov Chemical Plant of Acrylic Polymers Akripol, as well as several flocculants (water-soluble polymers) based on acrylamide, acrylic acid, and chitosan. It has been established that the optimal dose of H600TM nonionic flocculant was 5 mg/dm3. The efficiency of industrial wastewater treatment was studied on two samples of weakly cationic flocculants (215-2 and 233-2) synthesized in a laboratory way, as well as on a sample of nonionic H600TM flocculant. It has been revealed that the tested flocculants do not significantly influence the pH value and content of sulfate ions in water. Flocculant 233-2 with the highest chitosan content was the best in terms of chemical oxygen demand, dry residue, and the amount of suspended solids. Flocculant 215-2 with the lowest chitosan content had a slightly worse performance. The worst of the tested flocculants was the nonionic H600TM, which does not contain chitosan.

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