Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7261279 | Device for stirring and aerating a liquid in a treatment vessel A device for stirring and aerating a liquid in a treatment vessel may include a funnel disposed in the upper portion of the vessel to form a passage with the vessel. A duct is connected to the funnel and extends toward the bottom of the vessel and includes an openin... | 08/28/2007 |
| 7175764 | Method and device for purifying wastewaters The invention relates to a method for purifying wastewaters, particularly wastewaters produced in the paper industry, involving the following steps: a) aerobic clarification of the wastewater using activated sludge in an activation stage; b) carrying out, in a secon... | 02/13/2007 |
| 7153430 | Biological digestion of waste fluids with particles comminuting step The present invention relates to a method for the aerobic digestion of a fluid waste material, notably an aqueous sewage, in which at least part of the waste material and/or of the digestion mixture is comminuted to reduce the median particle size of biomass and oth... | 12/26/2006 |
| 6824684 | Wastewater treatment method and apparatus According to this wastewater treatment apparatus, wastewater can be treated by novel action by a foaming tank 7 in comparison with a treatment method solely using a biological treatment tank 1 constituting an aeration tank. That is, wastewater can be t... | 11/30/2004 |
| 6337020 | Method and device for purifying waste water comprising an additional sludge treatment by ozonation Method for purifying waste water, whereby the waste water is subjected to a biological treatment producing sludge, part of this sludge being recycled towards the biological treatment while being subjected to ozonation combined with mechanical stirring. A ... | 01/08/2002 |
| 6325933 | Process for biological purification of waste water under sludge retention A process for biological purification of waste water by the activated sludge method wherein the waste water is continuously passed through one or more treatment zones and a clarification zone, wherein the waste water treated in the last treatment zone at ... | 12/04/2001 |
| 6318705 | Aspirator The aspirator is utilized to introduce air, oxygen, or other gases into a liquid. The advantages of the present design include the ability to inject approximately 30% more air than a conventional current design at 50% of the rotational speed. This reduces... | 11/20/2001 |
| 6299776 | Biochemical oxidation system and process A biochemical oxidation system and process is disclosed for the removal of insoluble sulfides from metal ores. A liquid mixture of an ore slurry and of a liquid biochemical oxidation medium is flowed through a plurality of covered overflow tanks connected... | 10/09/2001 |
| 6254778 | Method for purifying carbon-containing pollution and denitrifying waste water in oxygenic medium The invention is a biological process for purifying waste water in order to produce an effluent with a low content of carbon and of oxygenated nitrogen compounds. The process includes an initial step of mixing the waste water in a biological reactor with ... | 07/03/2001 |
| 6241897 | Dissolution of gas Liquid in which oxygen-containing gas is to be dissolved is pumped through a main and distributed into faster-moving subsidiary streams. Each subsidiary stream passes through a turbulence-inducing means and air or oxygen is introduced into the turbulent r... | 06/05/2001 |
| 5626755 | Method and apparatus for waste digestion using multiple biological processes Methods and apparatus for treating waste streams utilize controlled introduction of microscopic gaseous bubbles to create, in a single vessel, as many as three separate biological environments in discrete, stratified zones. In preferred embodiments, bubbl... | 05/06/1997 |
| 5599452 | Wastewater treatment method A wastewater treatment plant for removal of organic matter, suspended solids and other pollutants comprising a pre-treatment chamber, a biofilm-aeration chamber and a settling chamber. Biofilm grows on biofilm support structure which is stationary and sub... | 02/04/1997 |
| 5282980 | Method for treatment of waste water sludge A method for treating liquid waste water sludge after its generation and separation from the waste liquid involves forcibly impacting sludge particles and microbial cells against a contact surface to thereby fragment the particles into smaller-sized parti... | 02/01/1994 |
| 5275735 | Method and apparatus for dissolving gas in liquid, e.g., in wastewater collection and transmission systems A method and the apparatus for the dissolving gas in liquid, in particular, dissolving oxygen and elimination of variable flow rates in wastewater collection and transmission systems that provides the means to stop the generation of toxic chemicals, allow... | 01/04/1994 |
| 5264130 | Method and apparatus for recirculation of liquids A waste liquid treatment system (10) includes an aeration chamber (10A) and a settling chamber (13). An aerator (11) is disposed within the aeration chamber (10A). A conduit (12) delivers liquid from the aeration chamber (10A) to the settling chamber (13)... | 11/23/1993 |
| 5045202 | Centrifugal oxygenator for treatment of waste water and system Apparatus and system for increasing the efficiency of absorption of oxygen by biodegradable waste and particle break-up thereof, by introducing waste and gas, which may be air, into a collector under a highly agitated state, and agitating the air and wast... | 09/03/1991 |
| 4975197 | Orbal wastewater treatment process In an orbal wastewater treatment process including a plurality of concentric, annular basins or channels having surface aeration means, wastewater and recycled activated sludge are mixed in a first channel by a combination of the surface aeration means an... | 12/04/1990 |
| 4940546 | Installation for aerobic biological purification of pollutant-containing water The invention relates to an installation for aerobic biological purification of pollutant-containing water, which installation consists of an axial-flow submerged reactor and a sedimentation tank for separation of the biosludge from the purified water. Th... | 07/10/1990 |
| 4917805 | Cyclical complete mix activated sludge process A nitrification-denitrification process is disclosed wherein a single flow-through and cyclically operated complete mix activated sludge basin, containing mixed liquor having a mean cell residence time of at least 15 days, is fed with wastewater and disch... | 04/17/1990 |
| 4902302 | Conservation of momentum in a barrier oxidation ditch For use in an activated sludge process, dual-baffle aerators for both vertically mounted surface aerators and static mixer-aerators are disclosed. These devices substantially prevent back-mixing of freshly aerated liquor into aerator intakes and provide d... | 02/20/1990 |
| 4897196 | Two-stage batch wastewater treatment A two-stage, batch process for purifying wastewater containing organic and adsorbable pollutants includes the steps of introducing a predetermined quantity of the wastewater into an aeration and settling zone of a primary treatment zone and aerating there... | 01/30/1990 |
| 4810386 | Two-stage wastewater treatment A two-stage process for purifying wastewater containing organic and adsorbable pollutants includes the steps of first aerating the wastewater in the presence of a powdered adsorbent, such as activated carbon, and biologically active solids in the aeration... | 03/07/1989 |
| 4797212 | Biological purification of waste waters In the particular embodiments of the waste water treatment system described in the specification, a waste water treatment basin has spaced-apart, moving aerator chains extending across the basin in a direction transverse to the flow of waste water through... | 01/10/1989 |
| 4655925 | Activated sludge method A method of removing nitrogen and phosphorus from waste water by using an activated sludge including aerobic bacteria is disclosed. The waste water is fed continuously and gradually into a treatment basin in which the sludge is contained so that a mixed l... | 04/07/1987 |
| 4614589 | Method and apparatus for biological aerobic wastewater treatment A method and apparatus for biological aerobic treatment of wastewater wherein oxygen is induced into a mixed liquor flow path and a method and apparatus for separating the liquid withdrawn from the mixed liquor flow path into a clear liquid stream and a f... | 09/30/1986 |
| 4505820 | Method for cleaning waste water Method for cleaning waste water, wherein the waste water (19) and oxygen gas (31) are flowing in opposite directions through a cylindrical multireactor (20) having a central rotatable pipe (24), the multireactor comprising a number of bioreactors and at l... | 03/19/1985 |
| 4455232 | Method and apparatus for induced-flow circulation and pressurized aeration in a barrier oxidation ditch A barriered circulator/aerator in the endless channel of a barrier oxidation ditch provides a directly pumped flow of mixed liquor into a central liquor inlet zone and an energy-release induced flow of mixed liquor into a surrounding liquor inlet zone at ... | 06/19/1984 |
| 4421648 | Apparatus and a method for biological treatment of waste waters An apparatus and a method for biological treatment of waste waters achieving biological oxidation of organic matter, biological nitrification and denitrification of nitrogenous compounds and biological removal of phosphorus and clarification of the treate... | 12/20/1983 |
| 4394268 | Conversion of plug flow and complete mix aeration basins to barrier oxidation ditches Methods are provided for converting both plug flow and complete mix basins of the prior art into barrier oxidation ditches. Circulator/aerators are described that can be prefabricated and dropped onto the floor of an existing basin so that, in combination... | 07/19/1983 |
| 4353800 | Method and an apparatus for biological treatment of waste waters A waste water treatment plant providing biological oxidation, biological nitrification and denitrification and biological removal of phosphorus and clarification of the treated waste water in a single reaction tank in a single suspended growth sludge syst... | 10/12/1982 |
| 4341633 | Surface aeration system with controlled aerator submergence Means and method for controlling submergence of surface aeration apparatus in enclosed covered aeration zones wherein liquid level is dependent on pressure of the overlying gas volume. Power consumption of the surface aeration device is sensed by a transd... | 07/27/1982 |
| 4244815 | Process and apparatus for the aerobic biological purification of liquid wastes containing organic pollutants A process and apparatus for the purification of effluent waters containing organic pollutants by a rapid biological oxidation (activated sludge) process characterized in that the liquid to be purified is introduced into a tank containing a liquid having a... | 01/13/1981 |
| 4202762 | Process and device for the aeration of waste water Waste water containing suspended biologically active sludge and circulating in an endless path in a vessel is aerated by withdrawing a stream of the water and recycling it to the vessel in the form of a plurality of downwardly directed jets which penetrat... | 05/13/1980 |
| 4138328 | Use of a high capacity aeration compartment in a multiple aeration system An apparatus for the purification of waste water in accordance with the activated-sludge process which comprises a buffer vessel downstream of a settling tank with a mechanical cleaner, at least one oxidation trough or vessel provided with at least one ae... | 02/06/1979 |
| 4100062 | Method of treatment of an oxidizable material by a biochemical process The present invention relates to a method of and an installation for the treatment of a material oxidizable by a biochemical process, in which at least one oxygenation process is applied to a mixture comprising water, the oxidizable material and a biomass... | 07/11/1978 |
| 4081368 | Activated sludge system with staggered partition basin A wastewater treatment system of the activated sludge type is disclosed having an aeration basin provided with staggered partitions and of a particular geometrical design and mode of operation whereby more efficient purification of the wastewater may be a... | 03/28/1978 |
| 3983031 | Methods and apparatus for controlling the supply of a feed gas to dissolution devices The supply of a gas to be dissolved in a liquid is controlled by initially sensing the concentration of dissolved gas in the liquid under treatment and subsequently producing appropriate control signals for adjusting the setting of a valve in the gas supp... | 09/28/1976 |
| 3966599 | Method and apparatus Methods and apparatus are disclosed for treating biodegradable waste products. A liquor of waste products is introduced into a reactor mixing zone comprising a column of fixed media material having a high surface area to volume ratio, a low resistance to ... | 06/29/1976 |
| 3954606 | Wastewater treatment system with controlled mixing A wastewater treatment system of the activated sludge type is disclosed in which variable degrees of effective staging of the mixed liquor are achieved in an oxygenated aeration basin without the use of walls or partitions to physically divide the mixed l... | 05/04/1976 |
| 3953328 | Separation of sludge A method for the separation of sludge in which a rising stream of liquid bearing suspended material is established in a clarifying trough and concentrated suspended material is drawn off by suction at that zone in the trough where the tendency of the mate... | 04/27/1976 |
