Abstract: An aeration assembly includes an end fitting having a top piece for attachment to a diffuser member. A gasket extends beneath the top piece. The aeration assembly may include a diffuser member with the end fitting. In one embodiment, the diffuser member has a hollow conduit section and a flange section. The flange section includes a series of openings extending along a length of the diffuser member. The openings extend through the flange section to an interior space in the conduit section.

Abstract: An aeration assembly includes an end fitting having a top piece for attachment to a diffuser member. A gasket extends beneath the top piece. The aeration assembly may include a diffuser member with the end fitting. In one embodiment, the diffuser member has a hollow conduit section and a flange section. The flange section includes a series of openings extending along a length of the diffuser member. The openings extend through the flange section to an interior space in the conduit section.

Abstract: Membrane strip diffusers are disclosed, useful for example in aerating wastewater in activated sludge plants. These diffusers have membranes, diffuser bodies comprising gas conduits and, in addition to the conduits, integral membrane supports elongated in the same general direction. Such conduits are for example co-extruded with the diffuser bodies. The supports are apertured to discharge gas into chambers formed beneath the membranes when they inflate, and the membranes have pores to discharge the gas. Ways to edge- and end-seal the membranes to the diffuser bodies and ways to support the diffusers are also disclosed.

Abstract: Membrane strip diffusers are disclosed, useful for example in aerating wastewater in activated sludge plants. These diffusers have membranes, diffuser bodies comprising gas conduits and, in addition to the conduits, integral membrane supports elongated in the same general direction. Such conduits are for example co-extruded with the diffuser bodies. The supports are apertured to discharge gas into chambers formed beneath the membranes when they inflate, and the membranes have pores to discharge the gas. Ways to edge- and end-seal the membranes to the diffuser bodies and ways to support the diffusers are also disclosed.

Abstract: Membrane strip diffusers are disclosed, useful for example in aerating wastewater in activated sludge plants. These diffusers have membranes, diffuser bodies and gas conduits elongated in the same general direction. Such conduits may be attached to or formed integrally with the diffuser bodies. Gas chambers form beneath the membranes when they inflate, and these are separate from but communicate with the gas conduits, e.g., through passageways distributed along the lengths of the membrane supports. Preferably, the passageway flow cross-sections are small, thus tending toward uniform distribution of gas along the membrane's length. Ways to edge- and end-seal the membranes to the diffuser bodies are also disclosed.

Abstract: Membrane strip diffusers are disclosed, useful for example in aerating wastewater in activated sludge plants. These diffusers have membranes, diffuser bodies and gas conduits elongated in the same general direction. Such conduits may be attached to or formed integrally with the diffuser bodies. Gas chambers form beneath the membranes when they inflate, and these are separate from but communicate with the gas conduits, e.g., through passageways distributed along the lengths of the membrane supports. Preferably, the passageway flow cross-sections are small, thus tending toward uniform distribution of gas along the membrane's length. Ways to edge- and end-seal the membranes to the diffuser bodies are also disclosed.

Abstract: A device for introducing ozone uniformly into water flowing through a conduit for disinfecting the water. An ozone-contacting vessel is provided and includes a downflow tube through which water is caused to flow. The downflow tube is positioned vertically within a diffusion chamber. Within the downflow tube are a plurality of layers of transversely extending porous elements that are in communication with a source of ozone to provide a relatively uniform distribution of fine ozone bubbles over the cross-sectional area of the downflow tube. The downflow tube can be J-shaped, to convey ozonated water into downstream ozone reaction cells to permit oxidation or disinfection of the water being treated. An outlet seal plate is provided at the J-tube outlet to prevent backflow into the J-tube upon shutdown of the contactor cell containing the J-tube.

Abstract: A series of non-lenticular ophthalmic lenses for use in the correction of aphakia having, in the case of each lens of the series, a front surface of rotationally symmetrical aspheric cross-sectional curvature designed for wide field of view with consideration of the aphakic eye as a dynamic optical system and geometry permitting cast-finishing to patient's prescription in currently fashionable large lens sizes with minimal weight, thickness and flatness allowing close fitting to the eye. The front surface aspheric coefficients are selected to overcome prior art rapid zero edge thickness conditions.