The ions with opposite charge can be exchanged.

In which year was the disc filter developed?

What is the diameter assumed for hollow fine membranes for treating sea water?

Which of the following is not removed by Ozonation?

______ is the process of elimination of most pathogenic micro-organisms.

What is the colour of the wastewater after 6 hours of a generation?

What is the drum diameter considered while designing the disc filter?

Which of the following is not removed by activated carbon?