Polyacrylamide is also widely used in the food industry Polyacrylamide is widely used in the sewage treatment industry. In fact, the food industry is also widely used. The emergence of food grade PAM products has drawn much attention and application in the food industry. The main applications for clarification or recycling of water in food production processes, as well as the comprehensive utilization of their by-products. Sugar Industry PAM is used to flocculate and precipitate bagasse in sugar solutions in the production of cane sugar to give a clear sugar solution (sugar beet sugar is not). The most widely used sugar factory is HPAM. It promotes the aggregation of colloidal particles into large flocculated masses that are easy to settle and have good filterability. Sugar cane waste molasses is a by-product of sugar mills, containing 30% -50% of sucrose and reducing sugar, sugar can be recovered after decolorization desalination clarification, can be consumed directly, but also lactic acid fermentation in the lactic acid bacteria, or in the presence of alcohol yeast Preparation of alcohol, or catalytic polycondensation reaction support caramel colorant. However, due to the complex composition of waste molasses, mixed with a large number of non-sugar ingredients and impurities, separation difficult to teach, so that most of the current molasses only for feed or fertilizer, but not value-added. Separation and purification of sugarcane molasses by using basic aluminum chloride and APAM as complex flocculants can rapidly coagulate and settle suspended molasses of molasses and provide a new effective way for the comprehensive development and utilization of molasses. Fermentation industry using alcohol fermentation brewing industry, the alcohol content of solid waste separated by about 4.5% of solid content, separation and recovery of these solid substances can be used to achieve the re-use of dilute water and solve environmental problems. The traditional method of using dilute water is to make feed. Another report of kraft paper can be used for its production of raw materials, which for the separation of loose water flocculation method to broaden the scope of the selection of flocculant, the selection of PAM as a flocculant possible. Dispersion of fine water into two steps: The first step is the physical and chemical treatment, that flocculant added to the formation of floc particles; the second step is the use of flocculation filtration solid-liquid separation. The specific steps are to filter out large particles of impurities in dilute water first, and then use polyacrylamide with a molecular weight of more than 3 million to form a solution of 0.1%, add the diluted solution to the diluted solution at a ratio of 1: 30 (volume ratio), and sufficiently stir , Still 2H after filtration, can get better separation. Molasses fermentation alcohol produced by the discharge of waste water containing potassium bitartrate, the comprehensive management of sodium hydrogen tartrate can be obtained. Mesocin is a new type of agricultural antibiotics, a variety of plant diseases have a better control effect, mycotoxin fermentation process in the production of bacteria mycelium thin and branched to soybean meal powder as the nitrogen source of the fermentation end point 91 % Insoluble particle size less than 0.045mm, resulting in post-processing of solid-liquid separation difficult, clear liquid yield low. Conventional methods such as pH adjustment, heat treatment, phosphate treatment and diatomite filtration can not fundamentally solve this problem.