The main products of a company are food and beverage, which mainly contain protein, fat, lactose, carbohydrate and other nutrients. Main pollution factors: PH, SS, COD, NH3-N.

If the discharge will lead to the increase of organic pollutants in the water body, and the eutrophication of the water body, if the oxygen can not be replenished in time, the anaerobic process will occur, which will lead to the dirty and smelly water body.