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5779890 |
Multi-eductor system
Improved gas distribution and mixing is achieved in a gas/liquid mixing basin particularly for aerobic or anaerobic sewage digesters. In addition to a draft tube positioned generally centrally in...
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5772886 |
Aquaculture process
An aquaculture process for dissolving gas in liquid by impinging two or more streams substantially and directly one to the other wherein the two streams enter an impingement zone from conveying...
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5755966 |
Method and apparatus for biological activation waste water treatment
Biological activation waste water purification method is disclosed, wherein the waste water is biologically purified in an activation process. Activated sludge is pumped into a circulation circuit...
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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...
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5674399 |
Sewage treatment method
The invention is directed to a sewage treatment system and method for treating sewage by microbes. The system includes and the method uses a settling tank with residual activated sludge and mixed...
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5667689 |
Method of augmenting flow in a wastewater treatment plant
A wastewater treatment apparatus is provided which includes at least an aeration chamber and a clarification chamber having a common wall therebetween, a transfer port opening through the common...
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5660724 |
Multi-pressure head tank for use with vertical shaft bioreactors
A multi-channel vertical shaft bioreactor having a downcomer; a riser operatively in communication with the downcomer to form a loop; an off-gas head tank; a part of the loop being through the head...
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5651892 |
Biodegradeable effluent nutrient removal
A method of treating municipal or industrial wastewater containing undesired concentrations of ammonium or nitrate ions comprising treating the wastewater under anoxic, denitrifying conditions with...
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5650069 |
Dual-stage biological process for removing nitrogen from wastewater
A process for biologically removing nitrogen and other nutrients from wastewater using recycled activated sludge. A mixed liquor is formed from influent wastewater and recycled activated sludge and...
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5645726 |
Treatment of waste liquor in a vertical shaft bioreactor
An improved apparatus for treating waste mixed liquor comprising a long vertical downcomer chamber; an adjacent long vertical riser chamber; a surface basin; said downcomer chamber and said riser...
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5599450 |
Anaerobic upflow batch reactor
A method for providing a uniform plug flow through an anaerobic wastewater treatment reactor includes distributing incoming wastewater generally evenly near the bottom of reactor and evenly...
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5582734 |
Oxidation ditch modification and automated control system for nitrogen removal and sludge settling improvements
A method for treating municipal wastewater in an oxidation ditch activated sludge system by automated determination of the nitrogen depletion inflection point, which enables anoxic cycles to be...
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5531894 |
Method of treating wastewater
A method of improving the quality of septic tank effluent is disclosed. Sewage wastewater having a significant concentration of waste solids is flowed to a septic tank. In the septic tank the...
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5525231 |
Method of operating a sequencing batch reactor
A method of operating a sequencing batch reactor having a cycle consisting of FILL, REACT, SETTLE and DRAW periods and optionally an IDLE period, wherein supply of feed to the sequencing batch...
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5518618 |
System and process for purifying waste water which contains nitrogenous compounds
A system for purifying nitrogenous waste water by biological nitrification and denitrification, comprises at least two essentially separated reactor chambers, a liquid supply (4) and a liquid...
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5507950 |
Floating water purification device and water purification method
A floating water purification device comprising at least a treatment tank enclosing a certain water area and a float which causes the tank to float in water, is characterized by the treatment tank...
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5503748 |
Sequencing batch air-lift reactor and method for treating wastewater
A batch wastewater treatment process using a novel sequencing batch air-lift reactor (SBALR) and upflow sludge blanket is described. The static Fill step of the sequencing batch process has an...
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5500119 |
Submerged fixed media for nitrification
The present invention relates to a novel apparatus for enhancing the nitrification of wastewater, and a method of its use. The present apparatus comprises the addition of a plurality of submerged,...
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5486291 |
Ecological fluidized bed method for the treatment of polluted water
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...
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5460722 |
Biochemical dripping board for aquariums
A biochemical drip board for aquariums formed of a flat board having a plurality of short posts extending down from the bottom, and at least a hanger at one end, each said short post having a very...
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5441634 |
Apparatus and method of circulating a body of fluid containing a mixture of solid waste and water and separating them
An apparatus and method of creating circulation of a mixture containing solid waste and water such as sludge and separating these components. The apparatus includes a tank housing, in inverted...
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5395527 |
Process and apparatus for treating wastewater in a dynamic, bio sequenced manner
A process for treating wastewater in a dynamic bio-sequenced manner in a single SBR reactor already filled with an activated sludge mixed liquor. In this process which is simple, fast and...
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5384049 |
Wastewater treatment process
Disclosed is a single basin, fill and draw wastewater treatment apparatus and method having a unique influent delivery manifold which delivers the incoming influent into a first zone that prevents...
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5364530 |
Process for the biological purification of sewage
A process for the biological purification of sewage is specified, with which sewage (AW), containing dissolved pollutants, and air (LT) are fed together to a reactor (1) via at least two mutually...
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5354471 |
Method of treating wastewater
Conventional biological processes for treating wastewater include the so-called activated sludge process which is continuous and the sequencing batch reaction (SBR) activated sludge process. The...
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5314622 |
Dual purpose oxygenator
Dual purpose apparatus and process for increasing the efficiency of absorption of oxygen by a biodegradable waste in a continuous operation in a waste collection station and for removing the oxygen...
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5314619 |
Method and apparatus for pond water clarification and maintenance
Apparatus is disclosed for improvement of water quality in a pond or similar body of water. A main conduit is located below the water surface and extending generally parallel to the shoreline. A...
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5302286 |
Method and apparatus for in situ groundwater remediation
A system for in-situ bioremediation includes a well extending into a saturated zone. The well includes a casing having two permeable sections in the saturated zone. Groundwater may be recirculated...
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5266200 |
Sequence continuous reaction in complete mix activated sludge systems
A complete mix activated sludge basin is operated as a Sequence Continuous Reactor by cyclically aerating the mixed liquor to form an aerobic cycle at selected high dissolved oxygen levels, during...
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5254253 |
Modular shipboard membrane bioreactor system for combined wastewater streams
Raw sewage ("black water" from toilets), wastewater from showers, sinks, kitchen facilities ("grey water") and oily water from the bilge of a host vessel ("oily water"), in combination,...
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5246309 |
System and method for decontamination of contaminated ground
A system and method for the decontamination of contaminated ground is described. Contaminated soil gas containing the contaminant is removed from the contaminated ground. Contaminants are separated...
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5234595 |
Two-phase orbital-type wastewater treatment system and method
A wastewater orbital treatment system includes an elongated racetrack-like tank containing a central partition wall. A surface aerator is mounted adjacent to at least one end of the partition wall...
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5228996 |
Method for treating waste water
Conventional biological processes for treating wastewater include the so-called activated sludge process which is continuous and the sequencing batch reactor (SBR) activated sludge process. The...
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5228998 |
Floating biological contactor
The method and apparatus of the invention are directed to the removal of pollutants from ponds, lagoons, streams, and similar waters. Floating apparatus is designed to house, nurture, and support...
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5217617 |
Multi-cell transportable bioslurry reactor
A transportable apparatus for biological treatment of a slurry of contaminated materials, including a series of square reactor cells having substantially parabolic lower portions, set at the same...
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5213681 |
Method for biologically removing nitrogen from wastewater
The present invention relates to a system and method for biologically removing nitrogen from wastewater. Both the system and method entails forming a mixed liquor and transferring the mixed liquor...
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5205935 |
High performance fixed film bioreactor
A method and apparatus for the continuous degradation of hazardous paint and organic solvent wastes. The apparatus includes a high performance fixed film bioreactor system into which is fed waters...
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5205936 |
Sequencing batch reactors
A sequencing batch reactor is controlled to provide an effective, efficient treatment of raw waste water. Controls include regular withdrawal of mixed liquor during each cycle of operation. The...
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5198105 |
Device for solids recycle in longitudinal-flow fluid-bed reactors for effluent treatment with carrier particles
The fluid-bed reactor for biological effluent treatment, using carrier particles for microorganisms, consists of a tank with a retention system for the carrier particles, gas supply units and a jet...
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5186837 |
Method for biological purification of wastewater with no excess sludge
The present invention relates to a method and an apparatus for biological purification of wastewater with no excess activated sludge by subjecting a machanically and/or chemically pretreated...
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5164089 |
Aquarium filter assembly
An aquarium filter assembly (10) which comprises a filter body (12) made of an open celled foam material which supports a culture of aerobic bacteria which removes toxic ammonia from aquarium water...
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5160620 |
Method and apparatus for treating water
Contaminated water is caused to flow up through a chamber while aerated to produce air bubbles of a size mainly in the range of 0.03 mm to 1 mm by means of air diffusors disposed at the bottom of...
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5156742 |
Liquid treatment method and apparatus
An improved method and apparatus for treating liquor containing biodegradable wastes wherein the liquor is first delivered to a quiescent primary settling zone and then to an aeration zone. The...
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5151187 |
Membrane bioreactor system with in-line gas micronizer
In a system for biodegrading oxidizable organic waste in a bioreactor in combination with a membrane ultrafiltration unit used to separate a high quality permeate from activated sludge which is...
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5120442 |
Process for the simultaneous chemical and biological elimination of solid and liquid organic waste
There is described a process for the simultaneous chemical and biological elimination of solid and liquid waste and apparatus for performing this process in the form of a loop reactor corresponding...
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5078882 |
Bioconversion reactor and system
The invention relates to an apparatus and process useful for the biological transformation of waste materials into ecologically desirable materials. A meta system reactor is disclosed comprising...
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5076929 |
Sewage lagoon system
The sewage lagoon system has a first pond containing mechanically and biologically degrading dissolved and undissolved organic and anorganic pollutant matter, without a recirculation of the forming...
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5032276 |
Method of biological activating water cleaning with fluid filtration
In order to improve the efficiency of biological reactors for water cleaning with fluid filtration, the activated sludge descending from the space of the fluid filter is simultaneously forcibly...
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5021161 |
Method for the treatment of wastewater
A process strategy for the treatment of wastewater in a sequencing batch reactor wherein wastewater in quantities above a preselected minimum amount is proportionally aerated so as to reduce energy...
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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...
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