What are the three methods of food processing wastewater treatment?

With the country’s strict requirements on food, some food companies also pay more attention to food wastewater treatment. Based on on-site inspections of food processing companies, on-site investigations and searches, and comprehensive data analysis of monitoring data from local municipal environmental monitoring stations , The technical team of our company has formulated corresponding process flow for food processing enterprises, which effectively solves the problem of wastewater treatment in food processing enterprises. Here is a brief introduction to several methods of sewage treatment.

Scope of food wastewater treatment

Sewage treatment and discharge can be divided into food industry raw materials and water used in product processing.

1. Solid substances floating in the wastewater, such as vegetable leaves, fruit peels, minced meat, poultry feathers, etc.

2. Substances suspended in wastewater such as oils, proteins, starches, syrups, colloidal substances, etc.

3. The substances dissolved in the waste water include acids, alkalis, salts, sugars, etc.

4. Sand, soil, and other organic matter entrained by the raw materials at the bottom of the sediment.

5. Some pathogenic bacteria, viruses, insect eggs, etc.

Food wastewater treatment method

1. Biological treatment method; physical treatment methods include sieving, skimming, adjustment, precipitation, air flotation, filtration, microfiltration, centrifugal separation, etc. The first five processes are mainly used for pretreatment, and the last three processes are mainly used for depth deal with;

2. Chemical treatment methods; chemical treatment methods include neutralization method, coagulation method, electrolysis method, redox method, ion exchange method, membrane separation method, etc.;

3. Biological treatment method; Biological treatment process includes aerobic biological treatment process, anaerobic biological treatment process, stabilization pond process, land treatment process and comprehensive biological treatment process combined by the above processes. According to the characteristics of high BOD and COD values of food industry wastewater, the biological treatment method is widely used at home and abroad.