Abstract: A sensitive colorimetric detector for formaldehyde vapor is prepared by applying a ketone solution of 4-amino-3-hydrazino-5-mercapto-1,2,4-triazole (AHMT) to a support coated with a stable metal bicarbonate to form a compound from which the ketone can be displaced by formaldehyde to yield a chromogen developing a purple color proportional to the amount of formaldehyde. The detector is sensitive to gaseous formaldehyde in air at concentrations below 2 ppm.

Abstract: A cyclone separator including boundary layer turbulence control that is operable to prevent undue build-up of particulate material at selected critical areas on the separator walls, by selectively varying the fluid pressure at those areas to maintain the momentum of the vortex, thereby preventing particulate material from inducing turbulence in the boundary layer of the vortical fluid flow through the separator.

Abstract: Extrusion drying of wet rubber crumb particles in the last phase of the overall elastomer drying process is improved through use of gas injected into the compression zone of an extruder thereby providing an improved efficiency in the explosion drying process. Rubber particles having a very low moisture content, such as less than 0.2% by weight, frequently less than 0.1%, are produced.

Abstract: A degassing/brine tank, for use in a chlorine generator system for swimming pools, for providing a fresh saturated brine solution continuously to the electrolytic chlorine generator cells of the system and to minimize escape of chlorine gas circulating in the system. The tank, fabricated of synthetic plastic material, has a plurality of vertically separated chambers, including, at its lower end, coaxially arranged inner and outer brine pick-up chambers. The outer annular chamber, open at its lower end, communicates with a salt and water reservoir within which the tank is immersed and a filtered supply of the brine is received by the inner, lower chamber. A check valve coupled to this inner chamber controls the supply of the brine solution into a helical coil by which the saturated brine solution is furnished to the electrolytic chlorine cells.

Abstract: The present invention relates to a device for the separation of a liquid from a sludge (12) or a liquid containing particles by means of a rotatable drum (1), inside which an inlet device for the supply of a sludge (12) or of a liquid containing particles debouches, the jacket (3) of said drum exhibiting ports (2) for making said separation of liquid possible, the drum (1) in its interior exhibiting a screw-type flange element (11) for the forward feed of the sludge, which flange (11) follows the rotating movement of the drum, said flange (11) extending from the inside of the jacket (3A) of the drum in direction towards the center (13) of the same.The invention makes possible an effective supply of sludge (12) etc. to the interior of the drum and an effective separation of liquid from said sludge (12).

Abstract: A fluid filtering device comprising a housing having an open top and defining an interior chamber while an inlet and an outlet on the housing are open to the chamber. A filter bag is removably insertable into the chamber through the open top of the housing and to a filtering position in which the filter element is positioned in between the inlet and the outlet. A rim around the outer periphery of the filter bag engages an inwardly extending flange formed on the housing to secure the filter bag to the housing. A cover is movable with respect the housing between an open and a closed position so that in its closed position, the cover closes the open top of the housing. A tubular element is secured to the cover which engages the filter bag and pushes the filter bag away from the open top of the housing and to its filtering position as the cover is moved to its closed position.

Abstract: A crucible useful for continuous preparation of single crystals with selected crystal orientation or for depositing thin films of crystalline materials such as silica on substrates such as graphite by the pendant drop growth (PDG) method, the crucible base being tapped with one or more capillary bores having a length equal to or greater than the retention height of the molten liquid used to prepare the crystal of film at the temperatures and pressures used, the crucible being improved by "capping" its bottom with a conical baffle plate supported by feet on the bottom of the crucible, the improved crucible providing single crystals having high dimensional regularity and containing no bubbles or unmelted inclusions and the single crystals being broadly useful in jewelry, horology, and electronics.

Abstract: The present invention relates to an apparatus and process for treating sewage sludge in which the sludge preferably has its pH adjusted to an acidic range. Then the sludge is conveyed to a vessel having an oxygen-rich atmosphere. The sludge is channelled through two different dispersing means by which it is comminuted and dispersed throughout the oxygen-rich atmosphere where it is completely oxygenated. To assure that the sludge is completely oxygenated, preferably it is caused to travel through two separate angles in the oxygen-rich atmosphere, each being greater than 90 degrees.

Abstract: A continuous process for the reclamation of a slurry of waste drilling mud fluids and water normally resulting from drilling operations. The process comprises the steps of conducting the drilling mud slurry to a slurry surge tank for liquid solid separation by chemical and physical methods.The mud slurry is subjected to a primary solids separation unit after pH adjustment is used to initiate coagulation and an organic flocculant is added to aid flocculation of the solids.The water is then subjected to a secondary solids removal, and the solids recovered are reintroduced in the primary solids separation unit. Thereafter the water obtained from the secondary solids removal is then subjected to a chemical oxygen demand reduction unit having a carbon adsorption unit or reverse osmosis membrane units therein to remove organic matter or dissolved solids to produce water meeting environmental discharge requirements.

Abstract: The invention relates to a filter comprising a housing at inside which are provided two separate filtering zones, isolated one from the other, each zone containing a stack of filtering elements; at least one admission orifice for the fluid to be filtered; one rotary fluid distributor arranged so as to be co-axial to said filtering elements; and a motor driving the distributor coupled to a first end thereof, whereas the second end of the distributor is free with respect to the actual body of the filter, and is guided in rotation by said bore alone.

Abstract: A portable water purifier having a filter housing adapted to contain a replaceable filter assembly to which filter housing is releasably attached an unfiltered water chamber with a pressurizing pump located on the top thereof. A cup member is releasably attached to the unfiltered water chamber covering the pressurizing pump and a cap member is releasably attached beneath the filter housing when the portable water purifier is in its storage mode. When the portable water purifier is in its use mode, the cap is removed from the base of the filter housing and attached to the bottom of the cup and the cup is removed from its position covering the pressurizing pump and attached to the filter housing at the position where the cap was attached.

Abstract: Large settling tanks or clarifiers of the travelling bridge type are provided in easily assembled small component sections fitting a conventional size flat bed truck for shipment to a use site to be assembled on a concrete basin requiring only a lifting crane and a small assembly crew. The knocked down clarifier eliminates heretofore required on-site time consuming building by skilled personnel and makes possible factory prefabrication of all of the clarifier parts with the exception of the concrete basin.

Abstract: A slide plate screen changer has a housing defining a material flow passage and a transverse slide plate passage in which is mounted a movable screen plate. Seal rings on the upstream and downstream sides respectively of the screen plate prevent leakage of material from the flow passage. One of the seals is adjusted by means of a threaded bushing which surrounds the flow passage and which protrudes axially from one end of the housing where it is fully accessible to torque exerting tools.

Abstract: A hydraulically powered mixing aerator rides on an upright beam member for submersion in a body of water such as an equalization basin, oxidation ditch or sludge holding tank used in sewage treatment plants. The aerator employs a submersible, hydraulically powered mixing motor driving a propeller which is mounted on the beam member by a slidable bracket for height adjustment. The beam member is swingably supported to allow adjustment of the vertical plane angle. Because the beam member is also mounted for rotation, substantially any attitude or position of the mixer can be selected for creating an efficient flow pattern within the body of water. The speed at which the propeller is rotated, and therefore, the rate at which the water is circulated and aerated, is selectively adjustable. The hydraulically driven motor provides for a low speed and high torque rotation of the propeller without the use of a reduction gear.

Abstract: The present invention concerns a flow regulation device for waste waters, characterized in that it comprises a flood-weir constituted by a tubular member of preferably hard synthetic material, i.e., polyester. The tubular member includes an S-shaped channel which is defined by baffles and a profiled discharge wing. A reduction adapter having a tubular tapered element and an overflow member, coupled to the top thereof, is upstream of and coupled to the waste-weir.

Abstract: A counter flow separator, for removing solid particles from a liquid, which includes a housing with an internal, peripheral helical surface and a turbine rotatable therein for forcing liquid through the housing with the particles passing down the helical surface to the bottom of the housing and the liquid passing upwardly through and out of the housing, and wherein the force of the liquid causes the rotation of the turbine.