Ice mats _____ the oxygen transfer surface.

Which of the following is an advantage of MBR?

Which ions are present on the charged surface of MBBR?

Which colour are the facultative ponds?

Anaerobic conditions occur at the bottom of the ditches.

Aerated ponds must be shallow.

In facultative ponds, micro-organisms are able to oxidize only dissolved organics.

Natural oxygenation is ___ in aerated ponds while compared to facultative ponds.