Kirsty;
A H2SO4 dosage is recommended to obtain H2O and CO2 from raw water with high HCO3 content. After acid dosage a CO2 removal degassor will be a must to increase pH. After CO2 removal, if you are still having a low pH, try a neutralization NaOH dosing system.
HCO3- + H+ > H2O + CO2
H2SO4...