Question

secondary water treatment is based on _. (a) physical method. (b) microbial method. (c) chemical method. (d)starter culture​

Answer 1

Answer:

physical method ...I think

Explanation:

Answer 2

★what is secondary water treatment?

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Secondary treatment is a treatment process for wastewater (or, more specifically, for sewage) to achieve a certain degree of effluent quality by using a sewage treatment plant with physical phase separation to remove settleable solids and a biological process to remove dissolved and suspended organic compounds.

★which type of method is secondary water treatment?

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Secondary wastewater treatment may be accomplished by biological or chemical -physical methods.