Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 5750041 | Method for backwashing water processing systems In a method for backwashing a water processing system using a buoyant filter layer constrained under wire mesh screen extending across a processing vessel, a water surface level in the processing vessel is lowered below the wire mesh screen. Air is subseq... | 05/12/1998 |
| 5728293 | External filter assembly for aquariums External filter assembly for aquariums includes a filter chamber containing a mechanical and/or chemical filter and a functionally active filter upstream of the mechanical filter for actively filtering the water before the water is filtered by the mechani... | 03/17/1998 |
| 5725759 | Reactor apparatus for treating water in iron removal system A system for removing iron from well water which, in addition to sources of air and water and an iron filter, has a reaction chamber wherein water containing dissolved iron is turbulently mixed with air and after oxidation of the water, excess air is remo... | 03/10/1998 |
| 5707416 | Method of recovering byproduct heat during composting The disclosure explains various methods of recovering byproduct heat from a compost stack while the compost stack is in a bacteria active stage. Several beneficial uses of the recovered heat are explained with specific examples given. Usage of the recover... | 01/13/1998 |
| 5707514 | Water treating method and apparatus treating waste water by using ion exchange resin A water treating apparatus is provided which can treat waste water for use as raw water in an ultrapure water producing system without addition of various kinds of chemicals. The apparatus includes a first water tank for receiving acid waste water, a seco... | 01/13/1998 |
| 5702594 | Apparatus for treatment of waste water and/or exhaust gases containing fluorine and surface active agents A first reaction/adjustment tank has a lower portion containing a calcium carbonate mineral, an upper portion containing a calcium carbonate mineral and a plastic filler, and an air lift pump for circulating waste water from the lower portion to the upper... | 12/30/1997 |
| 5702604 | Apparatus and method for waste water treatment utilizing granular sludge A wastewater treating apparatus has first, second and third bioreactors. Each bioreactor has, in an upper position, a reaction/sprinkling portion for exhaust gas treatment. The first bioreactor has, in a lower position, a submerged portion including an ae... | 12/30/1997 |
| 5698094 | Device for biological treatment of liquid, especially sewage A device for the biological treatment of liquids, especially sewage, including at least two compartments between which a vertical wall is inserted so that the compartments communicate with each other by free passages above and below the wall. The liquid t... | 12/16/1997 |
| 5695651 | Inlet screen The invention relates to the treatment of liquid waste such as sewage. The invention provides a method of screening of liquid waste to remove solid material therefrom, comprising passing the liquid waste in a downward stream through a suspended sack filte... | 12/09/1997 |
| 5693220 | Aquarium filtration system for semi-aquatic animals An aquarium filtration system for semi-aquatic animals, such as turtles, frogs and the like, which provides for collection and removal of waste material or debris generated within the aquarium while also providing for an artificial pond and a sunning plat... | 12/02/1997 |
| 5670046 | Treatment of nutrient-rich water A multistage treatment system for treating nutrient-rich water containing nitrogen compounds, phosphorous compounds, and other minerals. Three or more vessels or stages typically constitute the multistage treatment system. Each stage of the system is a re... | 09/23/1997 |
| 5667671 | Salt water aquarium integrated filter An aquarium integrated filter (10) that is designed to maintain the purity, cleanliness and biological health of an aquarium (250). The filter (10) includes within a single enclosure (12) all the filtering elements that are necessary to perform proper fil... | 09/16/1997 |
| 5665236 | Purification of liquids A system for purifying a liquid including a reactor and a clarifier with the clarifier arranged at an elevated position relative to the reactor so that residue from the clarifier can be returned to the reactor hydrostatically. Liquid in the reactor is aer... | 09/09/1997 |
| 5662794 | Solid-liquid separator and wet flue gas desulfurization apparatus A solid-liquid separator comprising a first roller disposed on one side of a tank containing a slurry subjected to solid-liquid separation at such a height that the lower part thereof is immersed in the slurry, and driven rotationally in a direction which... | 09/02/1997 |
| 5647983 | Aquarium system An aquarium system (10) includes an inlet reservoir (25), an aquarium tank (16) defining a container for water in fluid communication with the inlet reservoir (25) to receive water displaced from the inlet reservoir (25), an outlet reservoir (35) in fluid... | 07/15/1997 |
| 5645725 | Process and device for the biological treatment of organically polluted waste water and organic waste A process and a device for biologically treating an organic waste mixture containing organically polluted waste water and solid components. The process and the device involve exposing the organic waste mixture to a first decomposition stage where the soli... | 07/08/1997 |
| 5641462 | Continuous solvent extraction with bottom gas injection A method and apparatus for solvent extraction where the heavy and light phases are directed counter-currently into vertical mixing zones created by high-strength gas jets injecting gas up through the liquids to create an emulsion plume between the two liq... | 06/24/1997 |
| 5632886 | Cutting oil treatment apparatus Apparatus for the biological purification of cutting oil, such as used in metal machining apparatus, is disclosed. The invention herein provides a suitable aerobic environment for remediating cultured aerobic bacteria. These beneficial bacteria act to bre... | 05/27/1997 |
| 5632887 | Fluidized bed aquarium filter An aquarium filter for removing chemical and physical waste from an aquarium. The filter includes a fluidized bed of particles, such as sand, for removing ammonia from the water. The filter can also include a physical trap for solid material and activated... | 05/27/1997 |
| 5628905 | Biological aquarium filter with means to keep the siphon tubes primed A filtration apparatus for an aquarium comprising of mechanical, biological and chemical filter mechanisms for removing impurities from water and an intake tube/pre-filter arrangement for maintaining syphonability of the apparatus during both operating an... | 05/13/1997 |
| 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 |
| 5620602 | Method and apparatus for aerobic digestion of organic waste The invention provides a method and apparatus for increasing the rate of aerobic digestion of an organic waste. The apparatus is particularly suited for use with commercial or residential septic tanks. In general, the apparatus includes a medium with high... | 04/15/1997 |
| 5618414 | Treatment system for treating waste water A treatment system is described for treating waste water, comprising a container having an upper and a lower portion, at least one elongated hollow casing within the lower portion of the container, inlets, openings, or vents for aerating the treatment sys... | 04/08/1997 |
| 5618413 | Ecological fluidized bed system An ecological fluidized bed system and method for the processing of polluted water to provide treated water. The system comprises a fluidized bed container containing a layer of coarse media with a layer of fine media above it which has a buoyancy substan... | 04/08/1997 |
| 5616241 | Treatment of wastewater and sludges A system for treatment of influent materials such as wastewater, gases, solid and liquid waste, and sludges utilizes an anaerobic reactor followed by at least one sludge separator and at least one sludge conditioner. In the sludge conditioner, anaerobic a... | 04/01/1997 |
| 5609754 | Secondary sewage treatment system A secondary sewage treatment system is provided with a treatment vessel disposed within a septic tank. The treatment vessel has a draft tube for aerating and circulating waste liquor through the treatment vessel and through media contained within the trea... | 03/11/1997 |
| 5609753 | Biofilter A biofilter has a plurality of filter elements each of which has a filter medium of fragmented plastic, preferably waste plastic. The fragmented plastic has an inherent curvature to maintain adjacent surfaces of the fragment plastic in spaced relationship... | 03/11/1997 |
| 5599443 | Apparatus for waste water treatment using charcoal biologically activated The apparatus for waste water treatment has, in a tank, a contact circulation part in which Bincho charcoal is accommodated, a sprinkling circulation part which is disposed above the contact circulation part and in which black coal is accommodated, air li... | 02/04/1997 |
| 5593574 | Water treatment system particularly for use in aquaculture The invention relates to a water treatment system and more particularly to a fish tank and biofilter for use in a fish aquaculture. The fish tank has a double outlet system whereby solid waste particles are drawn continually into a central well by a trick... | 01/14/1997 |
| 5584991 | Filtration system for ponds Accordingly, a filtering system for ponds is provided. The system includes a pond filtering and skimming device having defining a first internal chamber. Disposed within the chamber is a removable net disposed between the inlet and filter to entrain any o... | 12/17/1996 |
| 5582719 | Filtration system A filtration system comprising a housing whose overall surface, excepting a bottom surface and an upper surface, is tightly closed, a filter medium disposed within the housing, an air jetting portion disposed within the housing at a higher location than t... | 12/10/1996 |
| 5582733 | Method and installation for purifying water using variably agitated denitrifying physical-chemical sludge To purify untreated water, for example waste water, containing organic pollution, materials in suspension and nitrogen-containing pollution, reagents are added under conditions adapted to coagulate all of the materials in suspension, including colloidal m... | 12/10/1996 |
| 5578214 | Apparatus and method for waste water treatment utilizing aerobic and anaerobic microorganisms and capable of exhaust gas treatment A waste water treatment apparatus is provided which can treat a high-concentration waste water containing persistent chemical substances including nitrogen and surfactant simultaneously with small amount of exhaust gases and is yet simple in construction.... | 11/26/1996 |
| 5578202 | Water processing system for highly contaminated water In a water processing system for processing highly contaminated water, comprising an anaerobic chamber, an aerobic chamber, a buffering chamber, and a recycle for recycling part of the water received in the buffering chamber back to the anaerobic chamber,... | 11/26/1996 |
| 5578200 | Sewage treatment system A sewage treatment system is provided for cleaning sewage by filtering solid components in the sewage through use of a floating filter medium, wherein the filtration performance can be improved and the filtration cleaning can be performed efficiently. The... | 11/26/1996 |
| 5558763 | Sewage treatment system with air jetting means A sewage treatment system is provided, for cleaning a sewage by filtering solid components in the swage through floating filter medium, wherein the filtration performance can be improved and the filtration cleaning can be performed efficiently. The sewage... | 09/24/1996 |
| 5556537 | Equipment for cleaning waste water A wastewater tank intended for use in a small sewage treatment plant. A spiral pipe is coiled around the exterior casing of the tank and is structurally secured to that casing, so that the pipe imparts structural stiffness to the tank. For example, the ca... | 09/17/1996 |
| 5545327 | Wastewater treatment method and apparatus A method and apparatus for treatment of biodegradable waste products. The influent is aerated and directed through a fixed media assembly to promote intimate surface contact and cause microbial growth. The fixed media assembly comprises a stack of spaced ... | 08/13/1996 |
| 5534143 | Microbubble generator for the transfer of oxygen to microbial inocula, and microbubble generator immobilized cell reactor A microbubble generator is disclosed for optimizing the rate and amount of xygen transfer to microbial inocula or biocatalysts in bioreactor systems. The microbubble generator, and an associated immobilized cell reactor, are useful in the detoxification an... | 07/09/1996 |
| 5527453 | Apparatus for treating dirty water aerated by solar powered compressor A dirty water treating apparatus includes a container having air permeability in which a porous material is placed. Aerobic bacteria are implanted onto the porous material. Dirty water is passed through the porous material while air is forcibly passed thr... | 06/18/1996 |
