One of the largest contributors of food processing wastewater is:

• A. The Dairy Industry
• B. The Beverage Industry
• C. The Meat Industry
• D. The Fruit Industry

Answer: (A)

The key idea here is that wastewater contribution depends on both how much water is used and how concentrated the waste is. The dairy industry tends to produce the largest volumes of wastewater because dairy plants operate continuously and require extensive cleaning of equipment—washing lines, pasteurizers, separators, and storage tanks—using a lot of water. This generates streams rich in organic material from milk solids, lactose, fats, and proteins, with whey from cheese or lactose processing adding a particularly high-strength waste stream. The combination of very high flow and high organic load means dairy wastewater often far exceeds other sectors in both volume and pollution potential, making it the largest contributor among food processing industries.