C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
362/25
C02F 3/22 (2006.01) C02F 3/12 (2006.01) C02F 3/20 (2006.01)
Patent
CA 1088230
Abstract of the Disclosure Apparatus for aeration of water for reduction of the biological oxygen demand, which comprises a cylindrical vessel with vertical axis of selected cross-sectional area and height. A horizontal dividing wall is positioned near the bottom of the vessel. Water enters into the space below the dividing wall and passes upwardly through a plurality of narrow slots spaced equally from each other. An air manifold is provided including a plurality of small diameter pipes, or arms, each of which is positioned over one of the slots in she dividing wall. A plurality of small diameter orifices are drilled on she underside of the arms, divided substantially equally on each side of the center line, so that as the water rises it is immediately contacted by she air bubbles, which issue through these orifices. The air bubbles and liquid would rise in a column above the arms. Near the top of the chamber is a horizontal baffle plate, which has an annular space between its outer circumference and the inner wall of the tank. The air and water flow through the annular space, and radially inwardly, where the air dis- engages from the liquid, and flows upwardly through an axial pipe, while the liquid flows downwardly through an axial pipe.
295022
John Zink Company
Smart & Biggar
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