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| Number | Title | Issue Date |
| 4111802 | Water treatment apparatus and method A single enclosure includes a reaction zone and a decanting zone. Water to be treated is introduced into the bottom of the reaction zone. A pump turbulently mixes the water and sludge within a turbulent area of the reaction zone and passes the resultant m... | 09/05/1978 |
| 4110209 | Method for treating a medium containing water with coagulants Method for increasing the chemical efficiency of precipitating agents having a metal base in the treatment of water, waste water or sludge. The medium to be treated is initially conducted by pressure into a mixing cell where it is mixed in free turbulence... | 08/29/1978 |
| 4078129 | Process for separating polyvinyl alcohol from its solution This invention relates to a process for separating polyvinyl alcohol from a solution. To an aqueous solution of polyvinyl alcohol, a coagulating agent is added. The coagulating agent consists essentially of a salting agent and a salt of boric acid. The sa... | 03/07/1978 |
| 4055494 | Thickening device and method A machine is disclosed for separating solids from feed liquor by gravity settling to form thickened subnatant. The machine includes a liquid-holding tank having an upstanding tubular column mounted therein for receiving the feed liquor. An inlet is formed... | 10/25/1977 |
| 4055491 | Apparatus and method for removing fine particles from a liquid medium by ultrasonic waves Apparatus and method are described for using ultrasonic waves for removing microscopic particles from a liquid medium, such as algae from a solar or refuse pond, or blood cells from blood. The described apparatus includes an ultrasonic generator propagati... | 10/25/1977 |
| 4043909 | Apparatus and method for solidification of sludges An apparatus for the solidification of sludges comprising an apparatus proper which can be moved in the vertical direction by lifting means and a casing surrounding the kneading zone of said apparatus proper and being capable of shifting in the vertical d... | 08/23/1977 |
| 4017390 | Method for separating solid pollutants from fluids Treatment of fluid polluted with solid particles, for instance, from a dust removal or washing process, by pretreating the fluid to agglomerate the particles, then whirling the fluid to centrifugally concentrate the particles in a first fraction of the fl... | 04/12/1977 |
| 3994808 | Treating contaminated liquids The invention provides a method and apparatus for treating liquids containing additional materials in which surface liquid is caused to flow from the main body of a liquid and is reintroduced under pressure either beneath the surface of the main body or b... | 11/30/1976 |
| 3977971 | Method of feeding polymers The present disclosure is directed to an improved method of flocculating solids dispersed and suspended in an aqueous medium which is undergoing a turbulent shearing action. The method of the invention is directed to the addition of particles of the polym... | 08/31/1976 |
| 3945917 | Decolorizing method for waste kraft paper mill effluents Considerable reduction in color of a kraft paper mill effluent has been found with the addition of barium ions (Ba.sup.+2) to the effluent. Unlike the familiar lime decolorization process for kraft paper mill effluents, decolorization using bar... | 03/23/1976 |
| 3941695 | Zero energy input flocculator A flocculator for use in water treatment plants which comprises a paddle wheel disposed in a sedimentation basin. The wheel is defined by a plurality of equally spaced semicylindrical paddles which at all times are fully submerged in the water and which a... | 03/02/1976 |
