GK
ECOLOGY BIODIVERSITY CONSERVATION ENVIRONMENTAL ISSUES
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
Suspended solids
|
|
Protozoa
|
|
Bacteria
|
|
All the above
|
Detailed explanation-1: -Ultrafiltration removes bacteria, protozoa and some viruses from the water. Nanofiltration removes these microbes, as well as most natural organic matter and some natural minerals, especially divalent ions which cause hard water.
Detailed explanation-2: -Ultrafiltration (UF) is used to remove essentially all colloidal particles (0.01 to 1.0 microns) from water and some of the largest dissolved contaminants. The pore size in a UF membrane is mainly responsible for determining the type and size of contaminants removed.
Detailed explanation-3: -Ultrafiltration is not going to eliminate dissolved solids or salts. Ultrafiltration only filters out solid particulate matter, but it does so on a microscopic level.
Detailed explanation-4: -Ultrafiltration filters remove particles based on size, weight, and charge; Ultrafiltration has a very high effectiveness in removing protozoa (for example, Cryptosporidium, Giardia); Ultrafiltration has a very high effectiveness in removing bacteria (for example, Campylobacter, Salmonella, Shigella, E. coli);