Adding chlorine to raw water before other treatment steps is known as pre-chlorination.
Addition of chlorine to raw water before treatment is known as-
Asked in HORTICULTURE DEVELOPMENT OF‐ FICER(HDO) 2015 · POST GRADUATE TEACHER (PGT) 2018 · Topic: Pollution (Water Pollution: Sources, common pollutants, water quality indicators (BOD, COD, DO), effects, control measures.)
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