| 1 | Colour and turbidity. | |
| 2 | Turbidity is an important index for drinking water. | |
| 3 | And for those on the sidelines without a job it's a troubling requirement. | |
| 4 | The two parameters provide basis for the theoretical analysis of the removal of turbidity using stub tube fillers. | |
| 5 | Observing wash degree, bulging ratio and distributing of filtrating material. Measure turbidity of filtrate and reduction of hydraulic pressure . |