WO2011029091A1 - Système de traitement des eaux usées par dénitrification - Google Patents

Système de traitement des eaux usées par dénitrification Download PDF

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Publication number
WO2011029091A1
WO2011029091A1 PCT/US2010/047979 US2010047979W WO2011029091A1 WO 2011029091 A1 WO2011029091 A1 WO 2011029091A1 US 2010047979 W US2010047979 W US 2010047979W WO 2011029091 A1 WO2011029091 A1 WO 2011029091A1
Authority
WO
WIPO (PCT)
Prior art keywords
deck
wastewater treatment
treatment system
outer tank
chamber
Prior art date
Application number
PCT/US2010/047979
Other languages
English (en)
Inventor
Jeff Coomer
David Clinkscales
Jeff Luthman
Cary Feller
Michael Taylor
Original Assignee
Consolidated Treatment Systems, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Consolidated Treatment Systems, Inc. filed Critical Consolidated Treatment Systems, Inc.
Priority to CA2773108A priority Critical patent/CA2773108A1/fr
Publication of WO2011029091A1 publication Critical patent/WO2011029091A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/006—Regulation methods for biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1242—Small compact installations for use in homes, apartment blocks, hotels or the like
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • C02F3/1273—Submerged membrane bioreactors
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/301—Aerobic and anaerobic treatment in the same reactor
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/02—Temperature
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/03—Pressure
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/44—Time
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Definitions

  • the present invention generally relates to residential and commercial sewage treatment systems and, more particularly, to aerobic waste treatment systems.
  • One type of sewage treatment system operates using an aerobic bacterial process that breaks down waste materials into carbon dioxide and water.
  • This aerobic treatment system has distinct advantages over the much more common anaerobic septic systems. The aerobic process is much faster and its products are less objectionable with regard to odor and flammability.
  • U.S. Patent Numbers 3,923,656 and 4,246,114 each disclose an aerobic waste treatment facility or system in which waste (often referred to as "wastewater”) is treated under aerobic conditions to transform the waste to an essentially clear effluent. Despite the efficiency of these aerobic waste treatment systems, nuisance and maintenance issues may result from user habits and detract from customer acceptance of the treatment systems.
  • U.S. Patent Number 7,077,952 discloses an aerobic wastewater treatment system that utilizes pretreatment and flow equalization to resolve these issues.
  • Such an aerobic wastewater treatment system is a great solution for sensitive environments, restricted sites, and seasonal or intermittent uses.
  • these treatment systems may not be the ideal solution for other applications such as a non-sensitive environment with steady use.
  • the present invention provides an aerobic wastewater treatment system that overcomes at least some of the issues of the related art.
  • an aerobic wastewater treatment system comprising, in combination, an outer tank, a deck located within the outer tank and forming an aeration chamber therebelow and an effluent chamber, and a plurality of porous bags hanging from the deck into the aeration chamber.
  • the deck has openings communicating interiors of the bags with the effluent chamber.
  • a submersible aerator is located within the aeration chamber.
  • An inlet communicates an exterior of the outer tank with the aeration chamber so that influent can enter into the aeration chamber.
  • An outlet communicates the effluent chamber with the exterior of the outer tank so that effluent can exit out of the outer tank.
  • a controller is adapted to operate the submersible aerator in a timed on- off sequence so that dissolved oxygen can be controlled to create times of anoxic conditions.
  • an aerobic wastewater treatment system comprising, in combination, an outer tank, a deck located within the outer tank and forming an aeration chamber therebelow and an effluent chamber, and a plurality of porous bags hanging from the deck into the aeration chamber. The deck has openings communicating interiors of the bags with the effluent chamber.
  • a submersible aerator is located within the aeration chamber.
  • an aerobic wastewater treatment system comprising, in combination, an outer tank, a deck located within the outer tank and forming an aeration chamber therebelow and an effluent chamber, and a plurality of porous bags hanging from the deck into the aeration chamber.
  • the deck has openings communicating interiors of the bags with the effluent chamber.
  • a submersible aerator is located within the aeration chamber.
  • An inlet communicates an exterior of the outer tank with the aeration chamber so that influent can enter into the aeration chamber.
  • An outlet communicates the effluent chamber with the exterior of the outer tank so that effluent can exit out of the outer tank.
  • There is a central opening in the deck and a vertical wall extending about the central opening and a surge bowl has a lower edge resting on the vertical wall and has substantially vertical walls.
  • FIG. 1 is a cutaway perspective view of an aerobic wastewater treatment system according to the present invention
  • FIG. 2 is an exploded, cutaway perspective view of the aerobic wastewater treatment system of FIG. 1;
  • FIG. 3 is a diagrammatic view of the aerobic wastewater treatment system of FIGS. 1 and 2;
  • FIG. 4 is a block diagram of a control system of the aerobic wastewater treatment system of FIGS 1 to 3;
  • FIG. 5 is a fragmented, sectional view of a flange interface for an outer tank of the aerobic wastewater treatment system of FIGS. 1 to 4;
  • FIG. 6 is an exploded perspective view a filter membrane assembly of the aerobic wastewater treatment system of FIGS. 1 to 5;
  • FIG. 7 is fragmented, sectional view of an alternative filter membrane holder
  • FIG. 8 is a perspective cut-away view of the filter membrane holder of FIG. 7;
  • FIG. 6 is an exploded perspective view an alternative access lid assembly of the aerobic wastewater treatment system of FIGS. 1 to 6, wherein a riser is provided;
  • FIG. 5 is an exploded perspective view an alternative surge bowl assembly of the aerobic wastewater treatment system of FIGS. 1 to 6, wherein a riser is provided.
  • FIGS. 1 to 4 illustrate an improved aerobic wastewater treatment system 10 according to the present invention.
  • the improved aerobic wastewater treatment system 10 is based on the treatment systems described in U.S. Patent Numbers 3,923,656 and 4,246,114, the disclosures of which are expressly incorporated herein in their entireties by reference.
  • the illustrated aerobic wastewater treatment system 10 includes an outer tank 12, a deck or plate 14 located within the outer tank 12 and forming an aeration chamber 16 therebelow and an effluent chamber , a plurality of porous filter bags 20 hanging from the deck 14 into the aeration chamber 16, a submersible aerator 22 located within the aeration chamber 16, a controller 24 adapted to operate the submersible aerator 22 in a timed on-off sequence so that dissolved oxygen can be controlled to create times of anoxic conditions an inlet 26 communicating an exterior of the outer tank 12 with the aeration chamber 16 so that influent can enter into the aeration chamber 16, and an outlet 28 communicating the effluent chamber 18 with the exterior of the outer tank 12 so that effluent can exit out of the outer tank 12.
  • the illustrated outer tank 12 includes a substantially cylindrical holding tank or lower portion 30 having an upwardly facing open mouth terminating at an outwardly turned lip or flange 32.
  • a generally dome-shaped outer shell or upper portion 34 has a downwardly facing mouth terminating at an outwardly turned lip or flange 36.
  • the flanges 32, 36 are secured together with mechanical fasteners 38 and sealant 40 is provided between the flanges 32, 36 to seal the joint.
  • the illustrated joint is provided with Butyl sealant but any other suitable sealant can alternatively be utilized.
  • the illustrated flanges 32, 36 form a void or pocket 42 for the sealant to ensure sealant compression.
  • the upper end of the outer shell 34 is provided with an upward facing access opening 44 terminating at inwardly turned upper lip or flange 46.
  • a mechanically fastened, vented access cover or lid 48 removably closes the access opening 44.
  • the illsutrated lid assembly 48 is designed both durable and tamper resistant.
  • Four stainless steel, recessed, alien head bolts fasten into cage nuts on the outer tank top flange 46 to secure the lid assembly 48 thereto.
  • the cage nuts are preferably stainless steel and permanently secured to the outer tank top flange 46. Removal can only be accomplished with special tools provided by the manufacturer.
  • four louvered vents 50 with weep holes 52 have been cast into the lid assembly 48.
  • the lid assembly 48 contains internal charcoal- filters 54, preferably in the form of sheets, behind the louvered weep holes 52 and within the outer tank 12.
  • the illustrated weir deck 14 is located within the outer tank 12 and rests on the upper flange 32 of the holding tank 30. It is noted that the weir deck 14 can alternatively be secured within the outer tank 12 in any other suitable manner.
  • the weir deck 14 forms the aeration chamber 16 therebelow and the effluent chamber 18 thereabove as described in more detail hereinafter.
  • the weir deck 14 has a centrally located opening 56 which is surrounded by a vertically extending wall 58. The upper end of the wall forms an opening terminating at inwardly turned upper lip or flange 60.
  • the weir deck 14 forms an upwardly extending weir 62 near the outer edge of the weir deck 14.
  • the illustrated weir 62 extends a full 360 degrees about the central opening 56 in the weir deck 14.
  • a plurality of openings 64 are formed through the weir deck 14 outward of the vertical wall 58 and inward of the weir 62 for the filter bags 20 as described in more detail hereinafter.
  • a removable surge bowl 66 is mounted on the upper flange 60 of the vertical wall 58. As the filter membranes 20 mature and grow a biomass on their exterior, flow through the system 10 will gradually slow until equalized. Given that the system's output is equal the amount input, as flow slows, a reserve capacity is needed as the system matures.
  • the surge bowl 66 accounts for this extra volume by providing the reserve capacity to store influent until it can slowly discharge out of the system 10.
  • the illustrated surge bowl 66 has a substantially horizontal wall 68 which engages the upper flange 60 of the vertical wall 58 and a substantially vertical outer wall 70 which forms an open upper mouth which terminates at an outwardly turned lip or flange 72 which rests on the upper flange 46 of the outer shell 34.
  • the lower wall 68 has an opening sized to cooperate with the upper opening of the vertical wall 58.
  • Outer wall 70 is substantially vertical and has a diameter as large as possible in order to keep operating head pressures in a mature system at a minimum and still be removable out of the access opening 44. Lower head pressures have proven to extend service intervals and reduce hydraulic failure due to overloading the system.
  • the lower and upper ends of the surge bowl 66 are secured with mechanical fasteners and gaskets to seal the joints.
  • the surge bowl 66 can be provided with a foam baffle or plate 74 that generally closes the upper end of the surge bowl 66.
  • the foam plate 74 can sit on top of the surge bowl 66 so that the access lid 48 seals the foam plate 74 to the surge bowl 66 when the access lid 48 is installed.
  • a hole is provided in the center of the foam plate 74 so it slides over an aerator intake pipe 76.
  • the foam plate 74 is desirable because the system 10 will foam during periods of stress (drastic change in temperature that occur in the spring and fall). With prior designs, this foam blows out under the cover and pools around the top of the system.
  • the foam plate 74 seals the top of the surge bowl 66, as well as the entire tank 12, and forces the foam back inside the sewer line through the inlet 26.
  • the foam plate 74 can be produced of fiberglass or any other suitable material and can have a thickness of about 3/16 or any other suitable thickness.
  • the plurality of porous filter bags 20 hang from the weir deck 14 into the aeration chamber 16 and are located at the openings 64 in the weir deck 14.
  • the illustrated system 10 utilizes thirty of the porous filter bags 20 but any other suitable quantity can alternatively be utilized.
  • the illustrated filter bags 20 comprise 100 micron polyester felt filter membranes and provide about 132 sq. ft of surface area. It is noted that any other suitable filter membrane can alternatively be utilized and any other suitable quantity of surface area can alternatively be utilized.
  • illustrated filter membrane assemblies 78 each include a filter membrane expander 80 and one of the porous filter bags 20.
  • the expander 80 includes a retainer or retaining portion 82 and an open body or open cage portion 84 downwardly extending from the retainer 82.
  • the illustrated retainer 82 is generally cylindrical shaped and has a central passage therethrough. A central portion of the outer surface is provided with external threads 86 adapted to cooperate with internal threads provided at the openings 64 in the weir deck 14 to removably secure the retainer 82 to the weir deck 14 and prevent the passage of untreated effluent therethrough.
  • the upper portion of the retainer 82 is provided with a pair of opposed radially facing openings 88 which form hand holds for threading and unthreading the retainer 82 into the weir deck 14.
  • the lower portion of the retainer 82 is adapted for receiving the upper end of the porous filter bag 20.
  • the upper end of the filter bag 20 contains an internal stainless-steal ring 90 which acts as a stop to prevent the filter bag 20 from passing through the weir deck 14 and threads onto the retainer 82 to prevent the passage of untreated effluent therethrough. Because the filter bags 20 are generally cylindrical shaped, they require the internal open cage 84 to prevent collapse, loss of surface area, and potential biomass bridging.
  • the illustrated open cage 84 includes three vertically spaced-apart ring members 92 which are connected together by a pair of opposed vertically extending connecting members 94.
  • the ring members 92 are sized to fully expand the filter bags 20.
  • the vertical members 94 are sized to extend substantially the entire length of the filter bags 20 and are secured to the ring members 92 and the retainer 82 at their upper ends.
  • the illustrated expander 80 is utilized to both secure the filter bags 20 to the weir deck 14 and hold the filter bags 20 open.
  • the open cage 84 of the expander 80 allows for free flow through the membrane and provides a settling/clarification area inside the membrane for oxidized organic matter (pin floe).
  • the expander 80 also allows for membrane cleaning without removal from the weir deck 14.
  • the expander 80 can comprise polyethylene or any other suitable material.
  • FIGS. 7 and 8 illustrate an alternative retainer 96 for the filter bags 20.
  • the retainer 96 is ring shaped and has a generally-S-shaped cross section.
  • the retainer 96 includes an inward facing recess 98 sized for receiving and retaining therein a stainless steel ring 100 at the upper end of the filter bag 20 and an outward facing recess 102 sized for receiving and retaining therein the edges of the opening 64 in the weir deck 14.
  • the illustrated ring 100 is sized so that it cannot pass through the opening 64 in the weir deck 14.
  • the illustrated recess 102 for the weir deck 14 is provided with a plurality of webs 104 for ensuring against the passage of untreated effluent therethrough.
  • the illustrated recess 102 for the weir deck 14 is also sized for an interference fit with the weir deck 14 to secure the retainer 96 to the weir deck 14 with a friction grip.
  • the illustrated retainer 96 is formed of rubber but can alternatively be formed of any other suitable material. This alternative retainer 96 has the advantage that it can be produced very inexpensively by extruding a web, cutting it to length and then forming the ring shape. It also has the advantage that it can be easily utilized in retrofit applications.
  • the illustrated submersible aerator 22 is located within the aeration chamber 16 near the bottom of the holding tank 30.
  • the air inlet line or pipe 76 vertically extends from the aerator 22 through the central opening 56 in the weir deck 14 and the surge bowl 66 to a location near the access lid 48 where air entering through the access lid 48 is available for the aerator 22. It is noted at any suitable submersible aerator 22 can be utilized. Operation of the aerator 22 is controlled by the controller 24 as described in more detail hereinafter.
  • the controller 24 is preferably adapted to operate the submersible aerator 22 in a timed on-off sequence to improve nutrient reduction. Note that this is different than the continuous operation utilized by the prior art systems.
  • dissolved oxygen can be controlled to create extended times of anoxic, or near anoxic, conditions.
  • the bacteria utilize nitrogen in the wastewater for respiration (if oxygen was present they would use that instead because it requires less energy) and convert it to nitrogen gas. It is believed that about 3 hours on followed by about 2 hours off is desirable for a 500 gpd system in warm weather. However, other on and off durations may be desirable depending on site conditions (specific wastewater characteristics,
  • the controller 24 preferably incorporates a programmed PLC control which monitors water temperature and pressure inside the outer tank 12 to cycle the submersible aerator 22 as required. Suitable temperature, pressure and/or oxygen sensors 106, 108, 110 are preferably provided within the tank 12 and in communication with the controller 24.
  • the aerator 22 is preferably provided with an integrated loss of air sensor 112 for stopping the aerator 22 and/or activating an alarm when air is not available to the aerator 22.
  • the illustrated inlet 26 communicates an exterior of the outer tank 12 with the aeration chamber 16 so that influent can enter into the aeration chamber 16.
  • the illustrated inlet 26 is in the form of a four inch pipe that horizontally extends from the exterior of the tank 12 through the wall of the outer shell 34 and the vertical wall 58 of the weir deck 14.
  • the exit opening of the inlet 26 is thus in communication with the aerobic chamber 16 through the central opening 56 and with the surge bowl 66 through the upper opening.
  • the inlet 26 can alternatively have any other suitable size and/or can alternatively have any other suitable location.
  • the illustrated outlet 28 communicates the effluent chamber 18 with the exterior of the outer tank 12 so that effluent can exit out of the outer tank 12.
  • the illustrated outlet 28 is in the form of a four inch pipe that horizontally extends from the exterior of the tank 12 through the wall of the outer shell 34.
  • the opening in the outer shell34 is preferably drilled on site a ⁇ during installation and there are preferably a plurality of predefined locations that can be selected for drilling the outlet opening. For example, there can be three predefined locations; one opposite the inlet (180 degrees from the inlet), and two at 90 degrees from the inlet in opposite directions.
  • the entrance opening of the outlet 28 is thus located in the effluent chamber 18. It is noted that the outlet 28 can alternatively have any other suitable size and/or can alternatively have any other suitable location.
  • Household wastewater enters the system 10 through the inlet 26 where it enters the aerobic chamber 16 through the central opening 56 in the weir deck 14.
  • the wastewater is cyclically mixed by the submersible aerator 22. Organic matter is broken down via aerobic and anaerobic digestion.
  • the wastewater passes through the membranes of the filter bags 20 which separate treated from untreated waste. The flow then travels up the inside of the filter bags 20, through the openings 64 in the weir deck 14, and discharges over the 360° perimeter weir 62 in the effluent chamber 18. Once in the effluent chamber 18, the treated effluent exits the tank 12 through the outlet 28. It is noted that the illustrated system lOis a one pass system.
  • a tank riser 114 can be installed on the outer tank 12. between the outer shell 34 and the access lid 48.
  • the tank riser 114 is provided with a rubber gasket and is mechanically fastened to the top of the outer shell upper flange 46.
  • a surge bowl riser 116 can also be utilized to ensure the system flow, head and basic operation remain unchanged.
  • the surge bowl riser 116 is provided with a rubber gasket and is mechanically fastened to the top flange 72of the surge bowl 66.
  • the aerobic wastewater treatment system 10 incorporates 100 micron positive filtration, cycled aerobic digestion/media scrubbing via a submersible aerator, and a 360° perimeter discharge weir to effectively treat typical residential wastewater in an improved manner.
  • the present invention has reduced from 15-20 Mg/L total nitrogen in a comparable prior art system down to 5Mg/L total nitrogen. No other wastewater treatment system has been able to do this effectively in a single pass system (most have to recirculate (multiple pass) or add a second process tank following initial treatment).

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  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Biological Treatment Of Waste Water (AREA)

Abstract

Système de traitement aérobie des eaux usées comprenant un réservoir extérieur, un plateau disposé à l’intérieur de ce réservoir et définissant au dessous de lui une chambre d’aération et une chambre d’effluent, et une pluralité de sacs poreux suspendus au plafond dans la chambre d’aération. Le plateau comporte des ouvertures communiquant avec l’intérieur des sacs dans la chambre d’aération. Un aérateur submersible est disposé dans la chambre d’aération. Une entrée met l’extérieur du réservoir extérieur en communication avec la chambre d’aération de sorte que l’influent peut pénétrer dans la chambre d’aération. Une sortie met la chambre d’effluent en communication avec l’extérieur du réservoir extérieur de sorte que l’effluent peut quitter ce réservoir. Une unité de commande agit sur l’aérateur submersible par séquences de marche-arrêt pour contrôler l’oxygène dissous et créer des périodes anoxiques.
PCT/US2010/047979 2009-09-04 2010-09-07 Système de traitement des eaux usées par dénitrification WO2011029091A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA2773108A CA2773108A1 (fr) 2009-09-04 2010-09-07 Systeme de traitement des eaux usees par denitrification

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US23987409P 2009-09-04 2009-09-04
US23986809P 2009-09-04 2009-09-04
US61/239,874 2009-09-04
US61/239,868 2009-09-04

Publications (1)

Publication Number Publication Date
WO2011029091A1 true WO2011029091A1 (fr) 2011-03-10

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PCT/US2010/047979 WO2011029091A1 (fr) 2009-09-04 2010-09-07 Système de traitement des eaux usées par dénitrification

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108892228A (zh) * 2018-07-30 2018-11-27 吉林建筑大学 一种菌藻复合生物膜污水处理装置
CN112537846A (zh) * 2020-12-22 2021-03-23 中国科学院生态环境研究中心 基于悬链式曝气导流封闭式的厌氧池装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246114A (en) * 1978-11-15 1981-01-20 Multi-Flo, Inc. Aerobic waste treatment package
US5624559A (en) * 1995-10-27 1997-04-29 H-Tech, Inc. Bag filter and retainer therefor
US6838005B2 (en) * 2001-06-22 2005-01-04 Frederick Tepper Nanosize electropositive fibrous adsorbent
US6890433B2 (en) * 2001-04-13 2005-05-10 Harry L. Nurse, Jr. System for treating wastewater
US20050109697A1 (en) * 2003-10-03 2005-05-26 Laurent Olivier Waste water treatment system and process
US7077952B2 (en) * 2004-05-21 2006-07-18 Consolidated Treatment Systems, Inc. Aerobic wastewater treatment system
US20070267334A1 (en) * 2004-05-25 2007-11-22 Osborn Gregory S System and method for dissolving gases in liquids
US7449113B2 (en) * 2002-09-24 2008-11-11 Advanced Aeration Control, Llc Controlling wastewater treatment processes

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4246114A (en) * 1978-11-15 1981-01-20 Multi-Flo, Inc. Aerobic waste treatment package
US5624559A (en) * 1995-10-27 1997-04-29 H-Tech, Inc. Bag filter and retainer therefor
US6890433B2 (en) * 2001-04-13 2005-05-10 Harry L. Nurse, Jr. System for treating wastewater
US6838005B2 (en) * 2001-06-22 2005-01-04 Frederick Tepper Nanosize electropositive fibrous adsorbent
US7449113B2 (en) * 2002-09-24 2008-11-11 Advanced Aeration Control, Llc Controlling wastewater treatment processes
US20050109697A1 (en) * 2003-10-03 2005-05-26 Laurent Olivier Waste water treatment system and process
US7077952B2 (en) * 2004-05-21 2006-07-18 Consolidated Treatment Systems, Inc. Aerobic wastewater treatment system
US20070267334A1 (en) * 2004-05-25 2007-11-22 Osborn Gregory S System and method for dissolving gases in liquids

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108892228A (zh) * 2018-07-30 2018-11-27 吉林建筑大学 一种菌藻复合生物膜污水处理装置
CN112537846A (zh) * 2020-12-22 2021-03-23 中国科学院生态环境研究中心 基于悬链式曝气导流封闭式的厌氧池装置

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