3 L Concept:: Low Initial Capital Costs,Low Operating Costs,Low Energy Cost/Consumption.
3 R Concept:: Reliable Performance,Resistance to corrosion,Robust in nature.
It is such a type of diffused Aeration system in which a tubular structure is there for diffusion of air.
It is such a type of diffused aeration system in which discs are used for the diffusion of air.