AEROBIC LONG VERTICAL SHAFT BIOREACTORS

摘要

An improved biomass waste treatment process wherein an aerobic biological reaction takes place in a vertical chamber having a first portion defining a first zone and a second portion defining a second zone below said first zone, said process comprising feeding a first biomass influent having a first biomass concentration to the first zone; feeding a first oxygen-containing gaseous stream to the first zone to effect mixing of the first oxygencontaining gaseous stream with the first biomass influent to effect circulation in unidirectional upward flow by gas lift and bio-oxidation to provide a first biomass effluent having a second biomass concentration; feeding first biomass effluent in plug flow mode to the second zone; feeding a second oxygen-containing gaseous stream to the second zone to effect mixing of the second oxygen-containing gaseous stream with the first biomass effluent without re-circulation to the first zone to effect bio-oxidation and provide a second biomass effluent and removing second biomass effluent from the second zone.