The correct answer is: D. All of the above
Double filtration is a process that uses two filters in series to remove more impurities from water than a single filter can. This can be done to increase the filtration capacity of either a slow sand filter or a rapid sand filter.
Slow sand filters are typically used in small communities or individual homes. They are relatively simple to operate and maintain, but they have a low filtration capacity. Rapid sand filters are more complex to operate and maintain than slow sand filters, but they have a higher filtration capacity.
Double filtration is often used in isolated buildings like pools, hotels, and swimming pools. This is because these buildings often have a high demand for clean water, and double filtration can help to ensure that the water is safe to drink and use.
Here is a brief explanation of each option:
- A. To increase the filtration slow sand filters capacity
Double filtration can be used to increase the filtration capacity of slow sand filters. This is done by using two filters in series. The first filter removes the larger particles from the water, and the second filter removes the smaller particles. This results in a higher quality of water than if a single filter was used.
- B. To increase the filtration rapid sand filters capacity
Double filtration can also be used to increase the filtration capacity of rapid sand filters. This is done by using two filters in series, just like with slow sand filters. The first filter removes the larger particles from the water, and the second filter removes the smaller particles. This results in a higher quality of water than if a single filter was used.
- C. For isolated buildings like pools, hotels etc swimming
Double filtration is often used in isolated buildings like pools, hotels, and swimming pools. This is because these buildings often have a high demand for clean water, and double filtration can help to ensure that the water is safe to drink and use.
Double filtration can be used to remove a variety of impurities from water, including bacteria, viruses, parasites, and sediment. It can also be used to remove chemicals, such as chlorine and chloramine.