7.24-Daily Topic (Pharmaceutical Engineering Edition)
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7.24–Daily Topic (Pharmaceutical Engineering Edition): Those who answer correctly will gain 10 wealth points, while those who answer incorrectly will gain 3 wealth points. Multiple-choice question: After 【 】, wastewater containing only organic pollutants usually has its BOD5 reduced to 20–30 mg.L-1, allowing the water quality to meet the specified discharge standards. A. Primary treatment B. Secondary treatment C. Tertiary treatment D. Filtration and pH adjustment B
Wastewater containing only organic pollutants, after going through [B], typically has its BOD5 reduced to 20–30 mg.L-1, allowing the water quality to meet the specified discharge standards. A、Primary treatment B、Secondary treatment C、Tertiary treatment D、Filtration and pH adjustment