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प्रश्न
Three statements are provided here which define the terms
(a) sludge
(b) sewage and
(c) wastewater.
Pick out the correct definition for each of these terms.
(a) The settled solids are removed in wastewater treatment with a scraper.
(b) Water from the kitchen is used for washing dishes.
(c) Wastewater is released from homes, industries, hospitals and other public buildings.
उत्तर
(a) The settled solids that are removed in wastewater treatment with a scraper – sludge
(b) Water from kitchen used for washing dishes – wastewater
(c) Wastewater released from homes, industries, hospitals and other public buildings – sewage.
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