What is the safe limit for manganese in water?

Which of the following below represents nitrate ion?

What is the minimum temperature required for denitrification process?

Which of the following is an advantage of closed loop?

Which type of character does the strong basic acid type II have?

In nitrification, ammonia is converted to _____

What is the desirable bed depth for AFM filtration?

What is the value for coarse filtration?