Q)Explain the tem primary treatment of sewage water and process involved in it?
Q) What is sludge and how's it disposed?
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1. Primary treatment/Physical treatment: It involves the removal of large and small particles from sewage. ... Then, soil and smaller particles are removed by sedimentation in the settling tank. The sediment is called primary sludge and the supernatant is called effluent. The effluent is then sent for secondary treatment
Digested sludge is passed through a dewatering step; the dried solids are disposed of, and the water is sent back to secondary treatment. Encyclopædia Britannica, Inc. Treatment and disposal of sewage sludge are major factors in the design and operation of all wastewater treatment plants.
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