Polyferric sulfate is a kind of purifying agent. It has good flocculation effect, low price, strong hygroscopicity and strong decolorization ability. It is widely used in the water industry. Many users will ask, what is the influence of low temperature environment on polyferric sulfate?
The effect of temperature on polyferric sulfate is very large. The temperature of polyferric sulfate in water treatment must be well controlled. Many experiments have found that polyferric sulfate prefers a low temperature environment.
1. In sewage treatment, polyferric sulfate inhibits the growth of activated sludge in biochemical reactions at low temperature;
2. In the water supply treatment, low temperature affects the flocculation, making it difficult for the effluent quality to reach the standard.
3. In order to improve the settling performance of the floc, at low temperature, the method of adding clay, active silicon and organic polymer compounds can not solve the performance of traditional flocculants well.
4. Through the test of turbidity and Zeta potential in the flocculation test of kaolin suspended particles by polyferric sulfate (PFS), it was found that at low temperature under the same PFC dosage, with the increase of alkalinity (B), the Zeta potential decreased. Small; to achieve the same turbidity removal, the dosage of PFS at low temperature is less than that at room temperature, and the Zeta potential is higher than that at room temperature at the same dosage of chemicals at low temperature; the temperature decreases PFC hydrolysis and precipitation speed decrease, making PFS hydrolyzed intermediates are more likely to react with pollutants, and at the same time enhance the neutralization ability and reduce the amount of PFS; the decrease in temperature reduces the degree of hydrolysis of the polynuclear hydroxyl complex intermediates of PFS and prolongs the time of maintaining the form, so PFS It is more effective than the traditional coagulant FeCl3 to treat low temperature and low turbidity water. Temperature is one of the important influencing factors in the water treatment process.
The above is the reason why polymerized ferric sulfate likes low temperature environment. When polymerized ferric sulfate purifies water, we must pay attention to the temperature control, so that it can achieve the highest efficiency of water purification.