How to judge the concentration and dosage of polyaluminum chloride? Polyaluminum chloride is used for sewage treatment and is mainly yellow or yellow-brown powder solid. Polyaluminum chloride has a coagulation effect and is suitable for printing and dyeing factories, paper factories, leather factories, food factories and other industries. pac coagulant also has the effect of removing phosphorus, which can form precipitation with phosphate radicals in wastewater, and is suitable for phosphorus removal in sewage treatment plants. Polyaluminum chloride is usually used as a coagulant agent and can also be used alone as a dephosphorization agent. Because of the different effects, the concentration and dosage of polyaluminum chloride are also very different. How to judge the concentration and dosage of polyaluminum chloride under normal circumstances?
The national standard content of solid polyaluminum chloride is 28%, and the liquid content is 10%. Before using the solid, it should be dissolved to a concentration of 10% (can be dissolved by gas mixing or mechanical mixing). The dosage can be determined according to the turbidity of the raw water. Usually, when the turbidity of raw water is 100-500mg/l, the dosage is 10-20kg/1000 tons of water, which can be determined according to the pilot test.
When polyaluminum chloride is used in municipal sewage or industrial sewage, the corresponding dosage and concentration are different. In order to improve the treatment capacity, it is best to ensure the dose and effect through small-scale trials to field trials. Mix solid polyaluminum chloride (at room temperature) with water in a ratio of 1:3, dilute with 25-30 times of clean water for about 30 minutes, and then put it into water for operation. The consumption of drinking water purification is 1/100,000 of the raw water, that is, the consumption (solid) per thousand tons of water is about 15 kg of polyaluminum chloride. According to the turbidity and content of the water quality in the area, the dosage can be found out through experiments. Do a small test before use to find out the amount and add it.
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