While designing a mechanical screen, the clear space between the bars would be in what range?

How are colour and odour removed?

Secondary sludge includes treated sewage sludge.

What is the removal of fine particle sand dissolved solids called?

Supplemental means of aeration are often employed with an equalization basin to provide better mixing.

In ______ reactor the bed is filled with a packing material that expands when wastewater moves upwards.

Which type of treatment does clarification fall in?

What is the size of the openings for a fine screen?