As is well known, the amount of wastewater in food processing plants is large. There are various types of food plants, such as vegetable, fruit, and meat raw material residues, which result in complex composition of wastewater. Today, let's learn about the wastewater treatment process of food processing plants together.

Wastewater treatment equipment for food processing plants

Food processing plants have a wide variety of raw materials and significant differences in water quality. The main pollutants in their wastewater are:

1. There are many suspended solids, including minced meat, fruit peels, vegetables, and feathers of some poultry;

2. Difficult to degrade substances: Food often contains a large amount of protein, oil, colloidal substances, etc. during processing;

3. Containing sediment: Raw materials for poultry, vegetables, fruits, and other foods often contain sediment;

4. Containing a large number of bacteria: sewage will increase in bacterial growth rate with changes in weather;

5. Containing pathogenic bacteria: Due to the high concentration of suspended solids in wastewater, it can cause the death of some aquatic organisms, resulting in water pollution;

Due to the special nature of food wastewater, water pretreatment should be carried out before water treatment. Food wastewater treatment equipment mainly consists of sewage tanks, anaerobic tanks, contact oxidation tanks, and secondary sedimentation tanks.

Sewage tank: Food wastewater flows into the sewage tank after pretreatment, where it undergoes various adjustments to degrade organic compounds;

Anaerobic tank: The treated wastewater reacts with microorganisms, and the nitrite nitrogen in the wastewater will react with nitrate nitrogen, ultimately generating denitrification.

Contact oxidation tank: also known as an oxidation tank, the blower of the oxidation tank can provide oxygen, and the organic compounds in the sewage react with the biofilm upon contact.

Secondary sedimentation tank: Finally, the sewage can be discharged into the natural environment after reaching the standard in the secondary sedimentation tank.