When treating wastewater, polyaluminum chloride (PAC) is commonly used as a flocculant to help aggregate suspended solids and colloidal particles into larger agglomerates, facilitating subsequent sedimentation or filtration. The following are the general steps for using polyaluminum chloride to treat wastewater:
Water quality analysis: Before starting treatment, conduct water quality analysis of sewage samples to understand the characteristics of sewage, including suspended solids concentration, pH value, etc. This helps to determine the required dosage of flocculant.
Select the appropriate PAC product: Based on the water quality analysis results and treatment objectives, select the appropriate model and specification of polyaluminum chloride product. Different products may be suitable for different water quality conditions and treatment objectives.
Develop a flocculant dosing plan: Based on the recommended dosage range provided in the product manual, develop a flocculant dosing plan. This can be a preliminary plan determined based on laboratory experiments and experience.
Adding polyaluminum chloride: Add the planned amount of flocculant to the sewage. Usually, the dosing process involves stirring or mixing to ensure uniform distribution of the flocculant.
Observation of flocculation effect: After a period of time, observe the flocculation effect. Flocculants can aggregate suspended solids and colloidal particles to form larger flocs, which helps them to be more easily removed in subsequent treatment steps.
Adjusting the dosage: Based on the actual flocculation effect, it may be necessary to adjust the dosage of the flocculant to ensure the optimal treatment effect.
Conduct subsequent treatment: Based on the water quality after flocculation, carry out subsequent sedimentation, filtration, or other treatment steps to further purify the water quality.
Monitoring and optimization: Continuously monitor water quality, adjust and optimize the dosage of flocculants based on actual conditions to ensure continuous and effective treatment effects.
The specific treatment steps and conditions may vary depending on the sewage, so it is best to adjust them according to the specific situation in actual operation. In addition, the use of flocculants needs to comply with relevant environmental regulations and standards.