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प्रश्न
An ideal way for purifying oil refinery water is ______.
विकल्प
trickling filter
iron removal
defluoridation
sand and pressure filter
MCQ
रिक्त स्थान भरें
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उत्तर
An ideal way for purifying oil refinery water is trickling filter.
Explanation:
A trickling filter treats wastewater containing organic impurities. It suits refinery wastewater because microorganisms in the filter break down organic pollutants.
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