The correct dosage of polyaluminum chloride can achieve twice the result with half the effort. Because the properties of polyaluminum chloride include physical and chemical properties, better flocculant effect and economic benefits can be achieved when polyaluminum chloride is put in. Users can determine the better dosage per thousand tons of water through tests according to different source water turbidity, different seasons and different reaction conditions, Today, I would like to share with you a way to quickly identify the appropriate amount of polyaluminum chloride for sewage purification in the sewage treatment plant, which can achieve better purification effect.
1. According to different conditions of raw water, a small test can be conducted before use to obtain a better dosage. For the convenience of calculation, it is generally better to prepare the small test solution equipment according to the weight ratio (W/W) of 2-5%. If 3% solution is prepared: weigh 3g of polyaluminum chloride solid, put it into a clean 200ml measuring cylinder, add about 50ml of clean water, add water to dilute it to 100ml after dissolution, and shake it up.
2. For production, the product can be mixed and dissolved according to the proportion of polyaluminum chloride solid: clean water=1:9 to 1:15 (liquid product: 1:2 to 1:5). The solution with alumina content less than 1% is easy to hydrolyze, which will reduce the use effect. It is difficult to add uniformly if the concentration is too high.
3. Dosing shall be conducted according to the better dosage obtained from the small test, and attention shall be paid to investigation and adjustment during operation. If there are few alum flowers and large residual turbidity in the sedimentation tank, the dosage is too small; If the alum in the sedimentation tank is large and turned up, and the residual turbidity is high, the dosage is too large, which should be adjusted appropriately.
Polyaluminum chloride is applied to daily drinking water, industrial water, daily water, daily sewage and industrial sewage treatment, and plays a significant role in purifying daily drinking water and various industrial water. Especially in some cities with more rainwater, the problems such as sedimentation rate and water efflorescence in low turbidity urban sewage treatment have been solved. As long as the dosage of polyaluminum chloride is controlled, its sewage treatment effect is better.
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