Effluent Collection System
The effluent has to leave the UASB reactor via number of launders distributed over entire area discharging, to main launder provided at periphery of the reactor. The effluent launders can be designed in such a way that the weir loading (m3/m.d) should not exceed the design criteria of Secondary Settling Tank (i.e.185 m3/m.d). The width of the launders may be minimum 0.20 m to facilitate maintenance. The depth of the launder can be worked out as open channel flow.