Patent ID: 6733662
Filing Date: 2004-05-11
Classification: C02F,Y02W,Y10T

Abstract:
A long vertical shaft bio-reactor for the purification of waste waters containing biodegradable organic matter comprising:at least one primary downflow channel extending downward to a depth of approximately 70-90% of a total depth of the bio-reactor; at least one primary upflow channel in fluid connection with said primary downflow channel defining a mixing zone located below a lower port of the primary downflow channel, said primary upflow channel partitioned by at least one partition, valve, or baffle into at least first and second superior upflow channels fluidly connected with said primary upflow channel; said first superior upflow channel in fluid connection with said primary downflow channel through a first head tank, said first head tank fitted with a degassing plate to direct flow from said first superior upflow channel laterally to effectuate degassing; a waste water influent channel fluidly connected with said first superior upflow channel; a first fluid flow regulator operable to regulate fluid flow between said waste water influent channel and said first superior upflow channel; said second superior upflow channel in fluid connection with a second head tank, said second head tank fitted with a degassing plate to direct flow from said second superior upflow channel laterally to effectuate degassing; a recirculation channel fluidly connected with said second superior upflow channel; a second fluid flow regulator operable to regulate fluid flow between said recirculation channel and said second superior upflow channel; and, a gas distribution port for distributing an oxygen-containing gas into said primary upflow channel to generate air-lift within said primary upflow channel.