Polyaluminum chloride treatment of beverage plant SS content of high viscosity of wastewater has a good sticky effect Poly aluminum chloride coagulant used to deal with fruit juice wastewater, with good coagulation effect, less dosage, the advantages of a wide range of applications, is a Excellent coagulant, polyaluminum chloride dosage is the most important factor affecting the coagulation effect. When the dosage of coagulant is not enough or too large, no good coagulation effect is obtained. Dosing insufficient, water impurities can not be fully reverse charge and destabilization, can not agglomerate large; dosage is too large, colloidal surface will bring the opposite charge, so that just off the stability of the colloid again regained. Polyaluminum chloride fruit juice drinks bring people nutrition and pleasure at the same time, it also brings serious environmental pollution problems, including wastewater pollution problems are particularly prominent. Concentrated fruit juice wastewater has the characteristics of large viscosity, high COD value, high SS content and low pH. If a large amount of fruit juice wastewater is discharged directly into a water body without treatment, the water ecosystem will be affected, resulting in serious environmental quality of the surrounding water body Deterioration, the ecosystem structure of water damage, fish and shrimp poisoning, frequent occurrence of disease or death, the surrounding crop yield and quality have a serious impact. Apple juice processing, for example, the production of waste water from the apple washing, equipment cleaning, filtration and concentration processes. Wastewater contains sugar, pectin, pomace, cellulose, fruit acid, tannin, mineral salts, etc. The main sugars contained in the wastewater are fructose, glucose and sucrose. The wastewater contains a large amount of organic acids, Acid, citric acid, succinic acid. Its main features are: high concentration of organic matter, mixed wastewater high COD concentration. Juice production wastewater also contains a lot of broken fruit debris, fruit juice, pectin, suspended solids concentration, and easy acidification, resulting in reduced pH. Carbonated beverage concentrate production wastewater organic matter and ss high concentration, pH instability, large color, smell and so on. Carbonated drinks mainly concentrate pulp as the main raw material, supplemented by sucrose, CO2 and pure water production of carbonated drinks. Therefore, puree and sugar are the main components of pollutants in industrial wastewater from carbonated beverages. Polyaluminum chloride has a degrading effect on the ss concentration in wastewater. Carbonated beverage industrial wastewater is characterized by high COD concentration, pH changes and instability, the treatment more difficult. To this end, PAC producers filter water production and sales of a series of water purifiers for this wastewater. Purification properties of beverage wastewater Puree and sugar can contribute a lot of COD value, after the homogenization of the sewage COD concentration is about 3000mg / l, due to its longer molecular chain. Carbonated beverage concentrate production wastewater organic matter and ss high concentration, pH instability, large color, smell and so on. The main agent of carbonated drinks is a beverage concentrate prepared from syrup, colorings, sweeteners, sour agents, spices and sodium benzoate according to a certain proportion, and is the main raw material of beverage bottling plants. It produces a high organic matter, high suspended solids, high chroma, odor rich, alkaline wastewater in the production process, the choice of acidic ferric sulfate and other water purifying agent.