Table 2.
The quality of TW.
| Items | Turbidity (NTU) | Free residual chlorine (mg/L) | Total Hardness (CaCO3) |
Oxygen consumption (mg/L) | PH | Iron content (mg/L) | Manganese content (mg/L) | Aluminum content (mg/L) | Colority |
|---|---|---|---|---|---|---|---|---|---|
| Test value | 0.16 | 0.18 | 107 | 0.99 | 7.14 | < 0.05 | < 0.05 | 0.035 | < 5 |
| Standard | < 3 | 0.3 ~ 4 | < 450 | < 5 | 6.5 ~ 8.5 | < 0.3 | < 0.1 | < 0.2 | < 15 |
Oxygen consumption was calculated by O2 using CODMn method; Lead content < 0.004 (mg/L); Cadmium content < 0.0002 (mg/L); Mercury content < 0.0001 (mg/L); Selenium content < 0.001 (mg/L); Arsenic content: 0.001 (mg/L). The standard is the Chinese standard.