BACKWASH METHOD FOR BIOLOGICAL REACTORS

摘要

A media bed 16 in a biological reactor is backwashed in a plurality of short pulses. An outlet of the reactor 12 is preferably located above, but close to, the top of the bed. During a pulse, the outlet is closed and the bed may be fluidized or otherwise expanded to above the level of the outlet. Between pulses, the bed settles to below the level of the outlet.