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The growth rate of the food industry in India was 322 billion dollars in 2016 and is estimated to increase to 543 billion dollars in 2020. Different types of food processing industries are grain, beverage, dairy, and edible oil industries (Invest India 2020). Different wastes released from food‐processing industries are poultry, dairy, meat, sugar processing, etc. All these wastes are highly degradable and when they enter water bodies, they decrease the DO level to a significant extent. Major industrial discharges are organic contaminants rich in fats, proteins, and pathogens. The quality of effluents from food processing units have moderate to high BOD, high COD, TSS, and TDS, and large nutrient contents such as nitrogen, phosphorous, heavy grease, and oil.