Polyaluminum chloride (PAC) is a chemical substance commonly used in water treatment, mainly used for coagulation and precipitation of suspended solids, including oils and suspended particles. The following are the general steps for using polyaluminum chloride for oil removal:
Measurement of water quality: Before starting treatment, it is necessary to first understand the oil content and other pollutants in the water. This helps to determine the appropriate dosage of polyaluminum chloride.
Adjusting pH value: PAC performs differently under different pH conditions. Generally speaking, its oil removal effect is better under lower pH conditions. Acidic or alkaline substances can be used to adjust the pH value of water to suit the conditions of PAC use.
Add PAC: Gradually add an appropriate amount of polyaluminum chloride to the water according to the water quality and treatment requirements. Stir or mix the water to ensure uniform distribution of PAC.
Coagulation: PAC reacts with suspended solids in water to form larger particles, which facilitate sedimentation. This process is called coagulation, which helps to aggregate fats and other impurities into larger clusters.
Sedimentation: The water that has been coagulated is allowed to settle, causing the formed particles to settle to the bottom of the water. The precipitated clean water can be filtered or separated using different methods to remove suspended particles and oils.
Monitoring water quality: After treatment, it is necessary to regularly monitor the water quality to ensure the expected treatment effect is achieved. This includes detecting the concentration of fats and other pollutants.
It should be noted that using polyaluminum chloride for water treatment requires careful control of dosage and treatment conditions to avoid excessive dosing and other adverse effects. In addition, the treated water may require further treatment steps to ensure compliance with discharge standards or reuse requirements.
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