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公开(公告)号：US20170253516A1
公开(公告)日：2017-09-07
申请号：US15448088
申请日：2017-03-02
Applicant: Ovivo Inc.
Inventor： Tor Heimdal , Ryan Clark , Scott Hawkins , John Vorwaller
CPC classification number: C02F11/12 , B01F3/1221 , B01F5/104 , B01F5/108 , B01F7/007 , B01F7/165 , B01F7/22 , B01F2003/1285 , B01F2215/0052 , C02F11/121 , C02F2301/046
Abstract: In a sludge thickener water/wastewater treatment system, sludge solids are recirculated with a mixer positioned in the influent column or offset from the center column and within the stilling well, in order to produce essentially constant sludge solids concentration in the sludge withdrawn from the thickener. This solves the problem of thickeners producing inconsistent underflow solids concentration and often exhibiting problems with binding of rake arms due to sometimes very high sludge concentrations. Also, dewatering steps that follow thickening typically require a relatively constant solids concentration for efficient operation.
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公开(公告)号：US20170081230A1
公开(公告)日：2017-03-23
申请号：US14859164
申请日：2015-09-18
Applicant: Ovivo Inc.
Inventor： Tor Heimdal , John Vorwaller
CPC classification number: C02F11/12 , B01D21/0003 , B01D21/0006 , B01D21/06 , B01D21/2427 , B01D21/245 , B01D21/34 , C02F2201/004
Abstract: In a wastewater treatment system, a suction duct clarifier is converted to a suction pipe clarifier without penetrating existing concrete at the base of the tank. An elevated sludge collection box is added, positioned on the center column to rotate with rake arms, and a series of sludge riser pipes extend from the rake arms up into the sludge collection box for sludge delivery by hydraulic pressure differential. A sludge discharge downpipe is provided within the center/influent column for delivery of sludge from the collection box, and at the bottom of this pipe, above the tank floor, the discharge pipe exits through an opening in the center/influent column. At the outside of this opening is a sludge transfer box that receives sludge exiting the discharge pipe and conveys it down through the existing floor opening and to the existing under-floor RAS return pipe.
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13.发明授权公开(公告)号：US11919787B2
公开(公告)日：2024-03-05
申请号：US17445555
申请日：2021-08-20
Applicant: Ovivo Inc.
Inventor： Hiren Trivedi , John Vorwaller , Tyson Beaman , Sophia Baker , Sergio Pino-Jelcic , David Stensel
CPC classification number: C02F1/52 , C02F3/02 , C02F2001/007 , C02F2301/046
Abstract: A continuous flow granular/flocculent sludge wastewater process selects for granule biomass capable of nitrogen and phosphorus removal and controls granule size and concentration of granular and flocculent sludge for optimal nutrient, organic, and solids removal in a smaller footprint. A series of biological process zones lead to a secondary clarifier. Mixed liquor sludge, preferably from an aerobic zone, goes through a classifier or separator processing flow from the aerobic zone, to the secondary clarifier. In a sidestream process that can be included a portion of sludge preferably from an aerobic zone goes through a classifier or separator to selectively produce a granular-rich effluent, and the clarifier may also have a separator to further concentrate granular biomass, most of which is cycled back to an initial multi-stage anaerobic process zone. The anaerobic zone is structured and operated to encourage growth of granules in subsequent process zones.
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公开(公告)号：US11479943B2
公开(公告)日：2022-10-25
申请号：US17280771
申请日：2019-09-27
Applicant: Ovivo Inc.
Inventor： Tyson Beaman , Garret Beaman , John Vorwaller , Tyler Thomas
Abstract: A liquid level control system, which may be used with a clarifier in a sewage treatment plant, manages liquid level of an upstream basin by controlling liquid flow in or out of a system that may use a midstream device to equally distribute flow in or out of the basin. This headloss inducing device creates a non-linear relationship between upstream liquid level to be controlled and the lesser downstream liquid level behind the gate or valve. Without the use of electrical controls, the systems of the invention include a gate or valve with counterforces that manage the outflow stream of liquid while accounting for the non-linear head loss created by the midstream device, thus reaching a desired liquid level range for all system flowrates.
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公开(公告)号：US11331601B2
公开(公告)日：2022-05-17
申请号：US17267444
申请日：2019-07-19
Applicant: Ovivo Inc. , Tyson Beaman , Garret Beaman , Ryan Clark , John Vorwaller , Robert E. Hanford
Inventor： Tyson Beaman , Garret Beaman , Ryan Clark , John Vorwaller , Robert E. Hanford
Abstract: In a wastewater treatment system, a clarifier has a submerged effluent launder, with a sloped, submerged plate that allows clarified liquid to exit through submerged openings. The sloped surface tends to accumulate solids, which can lead to algae growth. Typical internal scum collection system equipment prevents any efficient way to clear the accumulated sludge off the launder surface because of interferences. As disclosed here, a scum discharge area or box is placed external to the clarifier in one embodiment. Scum is wiped from a vertical surface of the launder assembly, above the sloped launder surface, and swept over a scum beach at one position in the clarifier, to drop into a lower trough and the flow out through the clarifier wall to a drop out box or scum discharge area. This allows for a rake-attached, sweeping launder wiper to be moved with the clarifier's rake to remove the accumulation of sludge from the launder's submerged surface, without elaborate moving parts. The sludge is swept back to settle in the clarifier, improving effluent quality by preventing sludge from exiting along with clarified water. In another embodiment the scum discharge box is internal, as a low-profile vertically disposed channel against the inside clarifier wall, leading to an existing scum pipe through the clarifier wall.
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Patent Agency Ranking
16.发明申请公开(公告)号：US20210380443A1
公开(公告)日：2021-12-09
申请号：US17445558
申请日：2021-08-20
Applicant: Ovivo Inc.
Inventor： Hiren Trivedi , John Vorwaller , Tyson Beaman , Sophia Baker , Sergio Pino-Jelcic , David Stensel
Abstract: A continuous flow granular/flocculent sludge wastewater process selects for granule biomass capable of nitrogen and phosphorus removal and controls granule size and concentration of granular and flocculent sludge for optimal nutrient, organic, and solids removal in a smaller footprint. A series of biological process zones lead to a secondary clarifier. Mixed liquor sludge, preferably from an aerobic zone, goes through a classifier or separator processing flow from the aerobic zone, to the secondary clarifier. In a sidestream process that can be included a portion of sludge preferably from an aerobic zone goes through a classifier or separator to selectively produce a granular-rich effluent, and the clarifier may also have a separator to further concentrate granular biomass, most of which is cycled back to an initial multi-stage anaerobic process zone. The anaerobic zone is structured and operated to encourage growth of granules in subsequent process zones.
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17.发明授权公开(公告)号：US11161760B2
公开(公告)日：2021-11-02
申请号：US17027528
申请日：2020-09-21
Applicant: Ovivo Inc.
Inventor： Hiren Trivedi , John Vorwaller , Tyson Beaman , Sophia Baker , Sergio Pino-Jelcic , David Stensel
Abstract: A continuous flow granular/flocculent sludge wastewater process selects for granule biomass capable of nitrogen and phosphorus removal and controls granule size and concentration of granular and flocculent sludge for optimal nutrient, organic, and solids removal in a smaller footprint. A series of biological process zones lead to a secondary clarifier. Mixed liquor sludge, preferably from an aerobic zone, goes through a classifier or separator processing flow from the aerobic zone, to the secondary clarifier. In a sidestream process that can be included a portion of sludge preferably from an aerobic zone goes through a classifier or separator to selectively produce a granular-rich effluent, and the clarifier may also have a separator to further concentrate granular biomass, most of which is cycled back to an initial multi-stage anaerobic process zone. The anaerobic zone is structured and operated to encourage growth of granules in subsequent process zones.
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18.发明申请公开(公告)号：US20210002154A1
公开(公告)日：2021-01-07
申请号：US17027528
申请日：2020-09-21
Applicant: Ovivo Inc.
Inventor： Hiren Trivedi , John Vorwaller , Tyson Beaman , Sophia Baker , Sergio Pino-Jelcic , David Stensel
Abstract: A continuous flow granular/flocculent sludge wastewater process selects for granule biomass capable of nitrogen and phosphorus removal and controls granule size and concentration of granular and flocculent sludge for optimal nutrient, organic, and solids removal in a smaller footprint. A series of biological process zones lead to a secondary clarifier. Mixed liquor sludge, preferably from an aerobic zone, goes through a classifier or separator processing flow from the aerobic zone, to the secondary clarifier. In a sidestream process that can be included a portion of sludge preferably from an aerobic zone goes through a classifier or separator to selectively produce a granular-rich effluent, and the clarifier may also have a separator to further concentrate granular biomass, most of which is cycled back to an initial multi-stage anaerobic process zone. The anaerobic zone is structured and operated to encourage growth of granules in subsequent process zones.
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19.发明申请公开(公告)号：US20200048131A1
公开(公告)日：2020-02-13
申请号：US16537379
申请日：2019-08-09
Applicant: Ovivo Inc.
Inventor： H. David Stensel , Hiren Trivedi , John Vorwaller , Tyson Beaman
Abstract: A continuous flow granular/flocculent sludge wastewater process selects for granule biomass capable of nitrogen and phosphorus removal and controls granule size and concentration of granular and flocculent sludge for optimal nutrient, organic, and solids removal in a smaller footprint. It includes anaerobic, anoxic, and aerobic process zones, a high soluble biodegradable COD loaded first reactor in anaerobic or anoxic zones, a granular sludge classifier with recycle of underflow granular sludge to the first reactor, a secondary clarifier to settle flocculent sludge and particulates and recycle of flocculent sludge from the secondary clarifier underflow to an aerobic process zone. Wasting of sludge from the two separate recycle lines controls the bioprocess flocculent and granular sludge concentrations and SRTs. Bypass around and recycle flow to the classifier to maintain desired flow under various influent flow conditions aid control of granule size. On/off mixer operation of anaerobic and anoxic reactors may be used.
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公开(公告)号：US10150687B2
公开(公告)日：2018-12-11
申请号：US15448088
申请日：2017-03-02
Applicant: Ovivo Inc.
Inventor： Tor Heimdal , Ryan Clark , Scott Hawkins , John Vorwaller
Abstract: In a sludge thickener water/wastewater treatment system, sludge solids are recirculated with a mixer positioned in the influent column or offset from the center column and within the stilling well, in order to produce essentially constant sludge solids concentration in the sludge withdrawn from the thickener. This solves the problem of thickeners producing inconsistent underflow solids concentration and often exhibiting problems with binding of rake arms due to sometimes very high sludge concentrations. Also, dewatering steps that follow thickening typically require a relatively constant solids concentration for efficient operation.
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