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प्रश्न
Give the basic steps involved in tertiary treatment of sewage water.
अति संक्षिप्त उत्तर
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उत्तर
Physical and chemical processes remove remaining organic matter, dissolved solids and harmful microbes, for example by chlorination or treatment with ozone or ultraviolet radiation.
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पाठ 14: Microbes in Human Welfare - EXERCISES [पृष्ठ ७६१]
