What are the ways of treating industrial effluents? -Geography

What are the ways of treating industrial effluents? -Geography
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To minimize the effects of pollution The hot waters and effluents could be treated before releasing it into the rivers. This treatment could be done in 3 phases: 1. Primary treatment: By using mechanical means like screening, grinding, flocculation, and sedimentation. Here the solids are separated from the wastewater stream. 2. Secondary treatment: Using the biological process. The dissolved biological matter is progressively converted into a solid mass by using indigenous, water-borne micro-organisms. 3. Tertiary: The wastewater is recycled in the tertiary stage.
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