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| Number | Title | Issue Date |
| 4036757 | Backflush filter system A filter system to follow a primary sewage treatment unit delivering substantially clarified effluent, the filter system having plural vertical filter columns nearly filled with filter aggregate and each column having a vertical stand pipe terminating nea... | 07/19/1977 |
| 4033872 | Reservoir tank A reservoir tank has filling and outlet ports which are provided in a common aperture formed through the tank top.... | 07/05/1977 |
| 4032446 | Waste material handling system An improved waste material handling system includes a plurality of waste food disposer units which are operable to disintegrate waste food materials to form a slurry. The system also includes a pulper unit which is operable to disintegrate solid waste mat... | 06/28/1977 |
| 4020676 | Method and apparatus for collecting fluid contaminants An apparatus to collect contaminants from a known volume of fluid and to present the collected contaminants for analysis. The apparatus has a first container to receive the known volume of fluid and a second container to receive the fluid from the contain... | 05/03/1977 |
| 4001115 | Filtration system with storage and dilution reservoirs A method of clarifying contaminated liquid through the use of a storage reservoir for containing high volume surges of contaminated influent and chemically treating the influent passed thereinto and a dilution reservoir for selectively transferring the co... | 01/04/1977 |
| 3986954 | Method and apparatus for clarifying contaminated liquids A method and apparatus for clarifying liquids contaminated with suspended materials that do not readily separate by gravity, is disclosed. A flowing stream of the contaminated liquid is initially passed to a mixing zone at a predetermined flow velocity an... | 10/19/1976 |
| 3981803 | Method and apparatus for anaerobic fermentation A method for the anaerobic fermentation of organic waste materials in a digestion zone, which method comprises introducing into the zone algae produced externally of the zone, and/or at least part of the liquid substrate in which such algae have been grow... | 09/21/1976 |
| 3971720 | Method of and apparatus for processing cattle excrement A method of and apparatus for separating from ruminant animal feces the undigested fibrous material that is preponderantly short pieces which consist of bundles of capillary tubes. The feces are mixed with urine, water from animal washing and preparation ... | 07/27/1976 |
| 3970552 | Method and means for separation of liquids from a mixture of solids and liquids The invention relates to a method for separation of liquids from a mixture of solid matter and liquids by supplying said mixture to a separation member which is permeable by liquid, simultaneously applying a vacuum to the underside of said separation memb... | 07/20/1976 |
| 3960726 | Automatic filter level control by dilution with filtrate An automatic control is disclosed to keep rotary vacuum filter slurry feed below an upper overflow level and above a lower prime level in a continuous operation in closed circuit with at least one rotary separation stage comprising the slurry feed supply ... | 06/01/1976 |
| 3959143 | Apparatus for filtering cooking liquids A portable filtration apparatus particularly adapted to remove solid and chemical contaminants from hot cooking liquids used in deep fryers, having a frame, a filter bowl mounted on the frame, a plurality of horizontal filter elements mounted on a hollow,... | 05/25/1976 |
| 3956128 | Apparatus for treating industrial and domestic waste waters A system for treating waste waters including a pair of concentric tanks forming a space therebetween which serves as an aeration chamber. Untreated but screened waste water is discharged into the (annular) space and withdrawn therefrom by a pump which pas... | 05/11/1976 |
| 3945922 | Installation for charging liquids, particularly fermentation liquids, with gas Installation for gassing highly emulsified fermentation liquids in which liquid recirculated to the reaction vessel is gassed in a centrifugal pump to improve the efficiency of the process.... | 03/23/1976 |
| 3931008 | Apparatus for the treatment of liquid wastes An apparatus which is suitable for the treatment of at least two liquid wastes which are chemically not compatible with one another, which comprises an addition zone for the addition of treatment substances to the wastes, a sedimentation zone for the sepa... | 01/06/1976 |
