A ground water supply has the following analysis:
Calculate the quantities of lime and soda ash for excess lime softening and the carbon dioxide reacted for neutralization by two-stage recarbonation. Assume the practical limits of hardness removal for calcium to be 30 mg/l and magnesium to be 10 mg/l, and three- quarters of the final alkalinity is converted to bicarbonate. Sketch the bar graphs for the raw and finished waters.
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