Polyaluminum chloride (PAC) is a highly effective decolorization treatment for wastewater derived from syrup production. Syrup is a widely used sweetener that has become an integral part of our daily lives.
Due to the restrictions on the use of food additives in many countries in recent years, most of the syrups in the food industry are made of corn, potato or wheat instead of more expensive sugar cane. In this way, the prepared syrup will contain some starch protein and more non-sugar impurities, so it must be decolorized.
At present, most of the domestic food industries commonly use flocculants such as polyaluminum chloride, polyferric sulfate, and polyacrylamide to decolorize syrup. Experiments show that the decolorization treatment effect of polyaluminum chloride is the best. Because polyaluminum chloride flocculant is a cationic polymer flocculant, and has the characteristics of natural, non-toxic and good safety. Therefore, it has been widely used in the decolorization process of sugar juice in recent years, and has achieved good results.
The research concluded that the optimal dosage of polyaluminum chloride flocculant is 300mg/kg, the ratio of PAC:CTS is 2:4, the pH is 6.2, the temperature is 75℃, and the time is 8min.
