# Chemical equation and calculation for remineralization system

Dear all, I am designing a remineralization system(Lime and CO2 gas injection to BWRO permeate ). So, our company received consultant from a vendor. Below chemical equation and calculation had calculated from a vendor. However, we don't know how to calculate below data "As such required: 39.22, 46.64, 85.86", "Actual alkalinity produced: 47.567, 87.5675". If you know well chemical equations and this calculation, please let me know how to calculate. Thank you. Dose Calculation for Lime + CO2 Ca(OH)2 + 2CO2 = Ca(HCO3)2 74 88 162 As such required: 39.22 46.64 85.86 As CaCO3: 53 53 53 Dosages as Such provided: 40 50 92.045 Actual alkalinity produced: 47.567 87.5675