BACKWASH METHOD FOR BIOLOGICAL REACTORS

摘要

A media bed in a biological reactor is backwashed in a plurality of short pulses. An outlet of the reactor 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.

主权项

1. A method for cleaning a biological reactor having a media bed, said method comprising:
a. stopping supply of a wastewater influent to be treated; b. supplying a backwash liquid to pass through said media bed; c. stopping supply of said backwash liquid; d. allowing said media bed to at least partially settle; and e. draining backwash liquid from above the media bed.