With the continuous improvement of people's living standards, the demand for food is becoming higher and higher, which has led to an increase in the production volume of some food enterprises. As a result, sewage generated during food production and processing is discharged indiscriminately, which flows into rivers and pollutes the river water, seriously affecting people's living environment. It is very important to change this phenomenon with food wastewater treatment equipment.

1. The food industry has a wide range of raw materials and a wide variety of products, resulting in significant differences in the amount and quality of wastewater discharged. The main pollutants in wastewater include (1) solid substances floating in the wastewater, such as vegetable leaves, fruit peels, minced meat, poultry feathers, etc; (2) Substances suspended in wastewater include oil, protein, starch, colloidal substances, etc; (3) Dissolved acids, alkalis, salts, sugars, etc. in wastewater: (4) Mud, sand, and other organic matter carried by raw materials; (5) Pathogenic bacteria and toxins, etc. The characteristics of food industry wastewater are high organic matter and suspended solids content, easy to decompose, and generally not highly toxic. Its harm mainly lies in eutrophication of water bodies, leading to the death of aquatic animals and fish, causing organic matter deposited at the bottom of the water to produce odors, deteriorating water quality, and polluting the environment.

2. Food wastewater treatment equipment treatment method:

The sewage treatment process is as follows: grid → regulating tank → lifting pump → air flotation → A/O contact biochemical tank → secondary sedimentation tank → disinfection and discharge sludge concentration tank → box filter press → external transportation (supernatant and filtered liquid return to the pump room regulating tank). The sewage part: comprehensive sewage flows into the grid, large particle solids and floating objects are intercepted, and the effluent enters the regulating tank. After water quantity and quality adjustment and pre aeration, the sewage is pumped to the oil separation sedimentation tank, and after removing suspended oil and fat, it enters the air flotation system to remove emulsified oil and then enters the composite A/O biological reaction tank for anoxic aerobic biochemical treatment, completing the nitrification denitrification process of ammonia nitrogen treatment. The aerobic stage degrades organic matter through the combined action of suspended growth of activated sludge and attached growth of biofilm. After sedimentation to remove residual suspended solids, the effluent is then disinfected with ultraviolet radiation and discharged into the urban pipeline network.
Sludge section: The sludge from the secondary sedimentation tank is partially returned to the composite biological reaction system, and the remaining sludge, together with the sludge generated from the oil separation sedimentation tank, flows automatically to the sludge concentration tank for concentration treatment. It enters the sludge dewatering machine for drying, and the dried sludge is regularly cleaned and transported outside.