Question: Jar testing was performed using alum on a raw drinking-water source that contained an initial turbidity of 21 NTU and an alkalinity of 34 mg/L

Jar testing was performed using alum on a raw drinking-water source

Jar testing was performed using alum on a raw drinking-water source that contained an initial turbidity of 21 NTU and an alkalinity of 34 mg/L as CaCO3. The optimum coagulant dosage was determined as 17 mg/L with a final turbidity of 0.25 NTU. Determine the quantity of alkalinity consumed as CaCO3

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