What is the amount of water used per person per day for flushing?

What portion of the Dissolved air floatation effluent is recycled?

______ allow the water to soak into the ground.

What is the capacity of the oil skimmer used? Flow: 90m3/h Oil present: 50 ppm

Gravity systems are preferred over pumping systems for the flow of wastewater.

The scum formed in the tank _____

What is the range of overflow rate for circular clarification unit?

Surfactants and finely divided solids _____the stability of the emulsion.