Sewage treatment chemicals such as cationic polyacrylamide, flocculant, polyaluminum chloride, and PAC flakes are used in the chemical plant wastewater treatment process.

In the selection of flocculants, medium-strong cationic polyacrylamide is generally used as a sludge dehydration agent and anionic polyacrylamide is used as a sewage sedimentation flocculant.