Food industry wastewater treatment

Food industry wastewater has the following characteristics:

High organic content: Food industry wastewater contains a large amount of organic matter, 

which mainly comes from the raw materials and additives used in the food processing process.

High suspended solids: Wastewater contains a large amount of suspended solids, which are 

mainly caused by substances such as fur and oil produced during food processing.

The water quality and quantity vary greatly: The water quality and quantity of food industry 

wastewater change with the production season, which increases the difficulty of treatment.

Containing bacteria: Animal food processing wastewater may contain bacteria, increasing the complexity of treatment.

The treatment of wastewater in the food industry mainly adopts the following methods:

Physical processing methods: including precipitation method, filtration method, centrifugal 

separation method, flotation method, etc. These methods remove suspended solids and impurities 

from wastewater through physical means.

Chemical treatment methods: including coagulation, neutralization, oxidation-reduction, electrolysis, 

adsorption, electrodialysis, reverse osmosis, etc. These methods change the properties of wastewater 

through chemical reactions to meet discharge standards.

Biochemical treatment methods: including activated sludge method, biofilm method, oxidation pond 

method, and land treatment method. These methods utilize the action of microorganisms to convert 

organic matter into harmless substances, which are suitable for treating biodegradable organic wastewater.