Factors affecting the flocculation effect of polymeric aluminium chloride
water temperature: the hydrolysis of flocculant is related to the temperature, generally speaking, the water temperature of 20 ~ 30 ℃ is appropriate. Whenever the temperature rises 10℃, the hydrolysis rate increases 1 times. Temperature especially has a big influence on the flocculation effect of aluminium salt, when the water temperature is lower than 5℃, the hydrolysis speed of aluminium salt is very slow and the effect is significantly reduced. Temperature in 10 ~ 15 ℃, the generation of Al (OH) 3 floc is amorphous, loose and not easy to settle, low water temperature, water consumption hysteresis coefficient is large, resistance increases, the number of collisions is reduced, affecting the flocculation effect. At this time, polymer coagulant can be added to improve the treatment effect, or use air flotation instead of precipitation as a follow-up process. And when the temperature rises, the floc is more compact and easy to settle
Learn More
