slow sand filtration meaning in Hindi

Examples

1. Filtration occurs both in nature and in slow sand filtration.
2. Slow sand filtration was initially the technology of choice for water treatment, later being gradually displaced by rapid sand filtration.
3. The processes involved in removing the contaminants include physical processes such as settling and filtration, chemical processes such as disinfection and slow sand filtration.
4. "The original treatment process was by slow sand filtration, flowing by gravity from the draw-off tower to the filter beds.
5. Sand filters are one of the most useful treatment processes as the filtering process ( especially with slow sand filtration ) combines within itself many of the purification functions.
6. In the period 1881 up to 1908 the system was repaired repeatedly, until eventually a new method of filtration was chosen which was a combination of fast with slow sand filtration.
7. It was under Simpson's instruction that the Chelsea Waterworks became the first in the country to install a slow sand filtration system to purify the water they were drawing from the River Thames.
8. By this time there were complaints about the quality of the water that the company was drawing from the River Thames, and in 1829, under engineer James Simpson the Chelsea Waterworks Company became the first in the country to install a slow sand filtration system to purify the water.