In the process of food processing, many processes require water, such as thawing, cooking, cleaning, etc. in meat processing wastewater, so it is difficult to avoid a large amount of production wastewater. The food industrial park accommodates multiple food processing factories of different sizes and production types. In addition, there is not only a large amount of food processing wastewater in the industrial park, but also the composition of the wastewater received is very complex.
First of all, the waste water in the food industrial park should be treated separately
Different water quality conditions will lead to different wastewater treatment methods. For example, edible oil processing wastewater mainly contains pollutants such as grease, saponin and phospholipids. Dairy product processing wastewater contains protein, fat, lactose, carbohydrates, various chemical cleaning agents and disinfectant.
Therefore, the wastewater generated by different enterprises can be classified according to the situation, and after centralized collection by pipelines, it enters the wastewater treatment system for treatment, and finally meets the required discharge standards through different wastewater treatment methods.
How to choose the pretreatment process of wastewater in food industrial park?
Physical and chemical methods are commonly used in the pretreatment of wastewater from food industrial parks.
Physical methods include screening, skimming, adjustment, sedimentation, air flotation and filtration. The main purpose is to remove suspended solids and grease and other pollutants in the wastewater of food industrial parks, and prevent such pollutants from affecting subsequent biological treatment.
The commonly used chemical method is the coagulation method. By adding chemicals, the suspended matter in the wastewater has an adsorption effect, absorbs other surrounding substances, and then separates the large substances formed by coagulation. Generally, this method needs to be combined with sedimentation method or air flotation method, which can not only remove suspended solids and grease in wastewater, but also remove part of organic matter, and the effluent water quality is relatively clear.
What will be the biological treatment process of food industrial park wastewater?
According to the oxygen demand of microorganisms, we can divide the biological method into anaerobic biological treatment method and aerobic biological treatment method.
In the process of treating industrial wastewater, most of us use anaerobic biological treatment method and aerobic biological treatment method to treat wastewater together to achieve better wastewater treatment effect and reduce wastewater treatment cost.

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