Patent ID: 7972507

Claim:
An apparatus for wastewater treatment process using up & down aerobic-anaerobic reactors of channel type comprising: an anaerobic reactor of channel type ( 20 ); comprising a plurality of channels divided by horizontal partitions ( 4 ); an aerobic reactor of channel type ( 19 ) provided on top of the anaerobic reactor with a division partition ( 6 ) inbetween in a single reaction tank, comprising an Inlet ( 8 ), an Outlet ( 9 ), and a plurality of aerobic state channels ( 11 , 12 , 13 ), and a plurality of anoxic state channels ( 14 , 15 ), wherein the aerobic state channels ( 11 , 12 , 13 ) and the anoxic state channels ( 14 , 15 ) are disposed alternatingly and divided by vertical partitions ( 2 ) in the aerobic reactor ( 19 ); an anaerobic reactor inlet ( 3 ) connecting between the Inlet ( 8 ) and the anaerobic reactor ( 20 ); an anaerobic reactor outlet ( 5 ) connecting between the anaerobic reactor ( 20 ) and a starting one of the aerobic state channels ( 11 , 12 , 13 ); and a plurality of air diffusers ( 1 ) provided in lower portions of the aerobic state channels ( 11 , 12 , 13 ), wherein the flow of the wastewater in the single reaction tank is based on the water level difference between Inlet ( 8 ) and Outlet ( 9 ), and the air lift effect of the air diffusers ( 1 ), wherein the horizontal partitions ( 4 ) of the channel type anaerobic reactor ( 20 ) and the vertical partitions ( 2 ) of channel type aerobic reactor ( 19 ) cross each other at the division partition ( 6 ), wherein the aerobic reactor ( 19 ) comprises the aerobic state channels ( 11 , 12 , 13 ) with the air diffusers ( 1 ) and the anoxic state channels ( 14 , 15 ) without air diffusers, wherein the single reaction tank has the effluent recycle of channel type aeration reactor (internal cycle) by pumping energy ( 16 ).