What is the mixture of methane and carbon-dioxide of anaerobic digestion called?

What is the angle at which the plates should be inclined in a lamella clarifier?

Lamella clarifiers are used as pre-treatment ahead of _____

The surfactants have __ chains.

What is the size of the oil droplets?

Which of these chemicals is not used during Dissolved air floatation?

What is the retention time for rectangular clarifiers?

Organo clays are manufactured by modifying _____with quaternary amines.