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In sewage treatment, the combined use of PAC (polyaluminum chloride) and PAM (polyacrylamide) is a classic combination in the industry. The fundamental reason lies in the complementary mechanism and synergistic effect of the two, and the best treatment effect cannot be achieved by using them separately. The following is a point-by-point analysis of the core reasons:

Aluminum oxide (Al₂O₃): content of 10%~30%, determines the flocculation efficiency, the higher the content, the greater the charge density.

According to the comprehensive analysis of existing regulations and chemical properties, polyaluminum chloride (PAC) is not a legal dangerous goods, but due to its chemical properties, the use and storage should strictly comply with safety specifications. The specific analysis is as follows:

1. Screening of core quality indicators

1.Alumina content (Al₂O₃)

● Industrial grade: ≥28% (plate frame/spray type), drinking water grade: ≥30%;

● Note: High content (30%) may be ineffective in acidic/low turbidity water and should be matched to the water quality

For the scientific application of polyaluminum chloride (PAC) in high turbidity water bodies, combined with industry practice and experimental data, the following step-by-step operation guidelines and key precautions are as follows:

Roller-dried polyaluminum chloride (PAC), a highly efficient flocculant for water treatment, is widely used in both water purification and wastewater management. As a solid form of polyaluminum chloride (PAC), it is manufactured through a drum-drying process, offering advantages such as convenient storage and high efficiency. Below I will elaborate on key aspects: