Abstract: A flotation apparatus 110 includes a separation chamber 112 with six separation vessels 114 located around the periphery of the chamber 112. A tangential inlet 122 is provided for each vessel 114 through which a mixture of oil and water passes into the vessels 114, with separation occuring as some of the material carried by bubbles weirs over the top of the vessels 114. Separated oil passes out through an oil outlet 126 in an upper part of the chamber 124, and gas passes out through a gas outlet 130 at the top of the chamber 124.

Abstract: A filtration arrangement 10 including a closed pressure vessel 12 with an upper inlet 14 and a lower outlet 16. A particulate filter media 26 is provided in the vessel 12 with an upper layer 28 of walnut shell for oil removal, a finer garnet layer 30 for solids removed, and a coarser garnet support layer 32.

Abstract: Apparatus 10 for separating a mixture of oil and water. The apparatus 10 comprises a cylindrical vessel 12, with a cylindrical divider 18 separating the vessel 12 into a central zone 24 and outer annular zone 22. An upper part of the divider 18 provides a weir to enable fluid in the central zone 24 to pass into the outer zone 22. A tangential inlet extends into the central zone 24 at a lower part of the vessel 12, with an outlet 36 at the upper end of the vessel 12 for oil and/or gas, and a water outlet 42 on the side of the vessel 12 a small distance above the bottom of the outer zone 22.