Physical and chemical parameters | Raw water | Chemicals added | |
Ca(OH)2 | NaOH | ||
Physical properties | T = 25C; TDS = 40 mg/L; I = 0.001 | ||
pH | 7.2 | 9.0 | 9.0 |
Calcium mg/L as CaCO3 | 40 | 45 | 40 |
Alkalinity mg/L as CaCO3 | 42 | 47 | 47 |
Acidity mg/L as CaCO3 | 47 | 42 | 42 |
C2 mg/L as CaCO3 | 2 | 2 | 7 |
pHs | 8.60 | 8.45 | 8.50 |
Saturation state | under | over | over |
[Ca]sat mg/L as CaCO3 | - | 40 | 36 |
CaCO3 precip. potential | −4 | 5 | 9 |
Langelier’s index | −1.4 | 0.55 | 0.50 |