FORESTRY
ECOLOGY AND ENVIRONMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What forms in the second step of water treatment?
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flocs
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alum
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aeration
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clorine
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Explanation:
Detailed explanation-1: -It is sludge formed during secondary sewage treatment. It possesses flocs of decomposer microbes. It does not possess flocs of decomposer microbes.
Detailed explanation-2: -Step 2: Grit Removal In this step, heavy but fine material such as sand and gravel is removed from the wastewater. This material is also disposed of in a landfill.
Detailed explanation-3: -Public water systems often use a series of water treatment steps that include coagulation, flocculation, sedimentation, filtration, and disinfection.
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