| 摘要 |
Water purification equipment comprising an inlet (7) a strainer (6), a self controlling sterilising device (2, 9, 10) a settling compartment (3) and a filter 4 is arranged with the sterilising device (9) below the highest water level, the level of the inlet (7), and above the level of an outlet from the filter 4. Preferably the filter 4 includes a siphon device (17, 20) to automatically backwash it when a predetermined back pressure occurs across the filter (4). A sterilising compound in the device is preferably of solid but soluble form and the sterilising device is arranged so as to allow a greater quantity of the compound to be dissolved when a greater flow of water to be purified occurs through the device. The filter 4 preferably includes activated carbon. The equipment is particularly intended to provide potable water from collected rainwater in rural areas and does not require any technical skill to erect, start or maintain. <IMAGE> |
