Polyaluminum chloride dosage, the amount of polyaluminum chloride per ton of sewage Polyaluminum chloride (solid) and water at room temperature by 1/3 weight ratio while adding while stirring until completely dissolved, and then diluted with water To the required concentration, raw water concentration of 100 ~ 500mg / dosage 3 ~ 6mg / L. Specific dosing, water quality should be based on water test, select the best dosage and then put into use. The following is a commonly used field of sewage treatment need to add the reference value of PAC! 1, domestic water 2.5 ~ 25 kg / kiloton of water 2, industrial water 2.5 ~ 25 kg / kiloton of water 3, urban sewage 15 ~ 50 kg / kiloton of water 4, electroplating wastewater 20 ~ 100 kg / Metallurgical waste water 20 ~ 150 kg / kiloton of water 6, papermaking wastewater 50 ~ 300 kg / kiloton of water 7, printing and dyeing wastewater 100 ~ 300 kg / kiloton of water 8, bleaching and dyeing wastewater 100 ~ 300 kg / Wastewater 100 to 300 kg / kiloton of water 10 Tannery wastewater 100 to 300 kg / kiloton of water 11 Food waste water 50 to 150 kg / kiloton of water 12 Chemical wastewater 50 to 100 kg / kiloton of water 13 Emulsified wastewater 50 ~ 200 kg / kiloton of water 14, coal washing wastewater 30 ~ 100 kg / kiloton of water