“Treatment of industrial effluents can be done in three phases.” Mention them. -SST 10th

“Treatment of industrial effluents can be done in three phases.” Mention them. -SST 10th
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The three phases are: (i) Primary treatment by mechanical means. This involves screening, grinding,flocculation and sedimentation. (ii) Secondary treatment by biological process. (iii) Tertiary treatment by biological, chemical and physical processes. This involves recycling of waste water.
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