公开(公告)号：US20180009687A1

公开(公告)日：2018-01-11

申请号：US15630648

申请日：2017-06-22

申请人： Sudhir N. Murthy ,  Haydee De Clippeleir ,  Christine Debarbadillo ,  Charles B. Bott ,  Stephanie Klaus ,  Bernhard Wett

发明人： Sudhir N. Murthy ,  Haydee De Clippeleir ,  Christine Debarbadillo ,  Charles B. Bott ,  Stephanie Klaus ,  Bernhard Wett

IPC分类号： C02F3/30 ,  C02F3/00

CPC分类号： C02F3/305 ,  C02F3/006 ,  C02F3/307 ,  C02F2209/006 ,  C02F2209/14 ,  C02F2209/15 ,  C02F2209/40 ,  C02F2209/44 ,  Y02E50/343

摘要： This disclosure relates to nitrogen removal with carbon addition, including for wastewater treatment. The denitrification reaction may be terminated at an intermediate nitrite product which is supplied to the anammox reaction. Nitrogen may be removed by use of an electron donor source including, but not limited to, acetate or glycerol at a specific zone. The electron donor may be used to convert nitrate to nitrite through appropriate dosing, anoxic SRT and/or maintenance of a nitrate residual in isolation or in combination. The subsequent supply of nitrite and ammonia for anammox reactions is also proposed. The slower growing anammox may be selectively retained on media or using other physical approaches. The overall intent of the present disclosure is to minimize the use of electron donor by maximizing denitratation and anammox reactions. Test results for selective retention of anammox in biofilm, granular or suspended growth system or nitrate residual control are provided.

公开(公告)号：US20190263696A1

公开(公告)日：2019-08-29

申请号：US16285146

申请日：2019-02-25

申请人： Bernhard Wett ,  Sudhir N. Murthy ,  Hampton Roads Sanitation District ,  D.C. Water and Sewer Authority

发明人： Charles B. Bott ,  Haydee De Clippeleir ,  Bernhard Wett ,  Christine deBarbadillo ,  Sudhir N. Murthy ,  Jessica Edwards-Brandt

IPC分类号： C02F9/00

摘要： An apparatus and a method for removing constituents from an influent. The apparatus includes a biological processor that receives a water mixture as influent and outputs a liquor, a solid-liquid separator that receives the liquor and separates the liquor into a liquid and a solid; and a biofilm media that includes at least one media surface. The biofilm media may have a biofilm mass, biofilm volume, biofilm density, biofilm thickness, hydraulic retention time or solids residence time. The at least one media surface grows a biofilm that removes one or more constituents contained in the influent. The biofilm mass, biofilm volume, biofilm density, biofilm thickness, hydraulic retention time or solids residence time can be controlled by at least one of a physical process, a biological process or a chemical process.

公开(公告)号：US20220289606A1

公开(公告)日：2022-09-15

申请号：US17654796

申请日：2022-03-14

申请人： Bernhard Wett ,  Sudhir Murthy ,  Hampton Roads Sanitation District ,  D.C. Water and Sewer Authority

发明人： Charles Bott ,  Stephanie Klaus ,  Michael Parsons ,  Haydee De Clippeleir ,  Christine deBarbadillo ,  Bernhard Wett ,  Sudhir Murthy

IPC分类号： C02F3/30

摘要： A methodology, system and apparatus are provided that include anoxic biofilms to perform partial denitrification and anammox (PdNA) reactions. The PdNA reactions can facilitate process intensification and carbon efficient biological nitrogen removal. The anoxic biofilms can be placed in a pre-anoxic zone or a downstream anoxic zone, where the biofilm and reactions are managed, including using storage compounds, to overcome mass transfer limitations in the biofilm. The methodology, system and apparatus can, when compared to state-of-the art technologies, improve the concentration gradient or reduce mass transfer limitations to facilitate PdNA reactions.

公开(公告)号：US07846334B2

公开(公告)日：2010-12-07

申请号：US11991927

申请日：2006-09-20

申请人： Bernhard Wett

发明人： Bernhard Wett

IPC分类号： C02F3/00

CPC分类号： C02F3/302 ,  C02F3/1263 ,  C02F2101/16 ,  C02F2101/163 ,  C02F2101/166 ,  C02F2209/06 ,  C02F2209/22 ,  Y02W10/15

摘要： A method for treating ammonium-containing waste water by means of a single sludge system in an SBR reactor, in which ammonium is converted to nitrite in a first reaction and ammonium and nitrite are converted into molecular nitrogen in a second reaction carried out in parallel, the oxygen concentration in the reactor being maintained at a low level. A robust process is achieved by providing that the pH-value of the system is controlled and kept at a target value by controlled intermittent aeration, the fluctuation range of the pH-value amounting to 0.05 at most, and preferably 0.02 at most, and the O2-concentration being kept between 0.2 mg/l and 0.4 mg/l, and preferably between 0.25 mg/l and 0.35 mg/l.

摘要翻译： 一种在SBR反应器中通过单一污泥系统处理含铵废水的方法，其中铵在第一反应中转化成亚硝酸盐，铵和亚硝酸盐在平行进行的第二反应中转化成分子氮， 反应器中的氧浓度保持在低水平。 通过控制间歇曝气控制系统的pH值并将其保持在目标值，pH值的波动范围最多为0.05，最优选为0.02，并且 O2浓度保持在0.2mg / l至0.4mg / l之间，优选在0.25mg / l至0.35mg / l之间。

公开(公告)号：US20090272690A1

公开(公告)日：2009-11-05

申请号：US11991927

申请日：2006-09-20

申请人： Bernhard Wett

发明人： Bernhard Wett

IPC分类号： C02F3/12 ,  C02F3/30

CPC分类号： C02F3/302 ,  C02F3/1263 ,  C02F2101/16 ,  C02F2101/163 ,  C02F2101/166 ,  C02F2209/06 ,  C02F2209/22 ,  Y02W10/15

摘要： A method for treating ammonium-containing waste water by means of a single sludge system in an SBR reactor, in which ammonium is converted to nitrite in a first reaction and ammonium and nitrite are converted into molecular nitrogen in a second reaction carried out in parallel, the oxygen concentration in the reactor being maintained at a low level. A robust process is achieved by providing that the pH-value of the system is controlled and kept at a target value by controlled intermittent aeration, the fluctuation range of the pH-value amounting to 0.05 at most, and preferably 0.02 at most, and the O2-concentration being kept between 0.2 mg/l and 0.4 mg/l, and preferably between 0.25 mg/l and 0.35 mg/l.

摘要翻译： 一种在SBR反应器中通过单一污泥系统处理含铵废水的方法，其中铵在第一反应中转化成亚硝酸盐，铵和亚硝酸盐在平行进行的第二反应中转化成分子氮， 反应器中的氧浓度保持在低水平。 通过控制间歇曝气控制系统的pH值并将其保持在目标值，pH值的波动范围最多为0.05，最优选为0.02，并且 O2浓度保持在0.2mg / l至0.4mg / l之间，优选在0.25mg / l至0.35mg / l之间。

公开(公告)号：US20090221054A1

公开(公告)日：2009-09-03

申请号：US12382550

申请日：2009-03-18

申请人： Bernhard Wett

发明人： Bernhard Wett

IPC分类号： C12N1/20 ,  C12M1/107

CPC分类号： C12M27/20 ,  C12M21/04 ,  C12M23/34 ,  C12M27/24 ,  C12M29/24 ,  C12M41/24 ,  Y02E50/343

摘要： A biogas system includes a fermenter having a first fermenting chamber and a second fermenting chamber for the fermentation of a fermenting medium. Biogas formed in the first fermenting chamber can be introduced into a riser pipe disposed in the second fermenting chamber.

摘要翻译： 沼气系统包括具有第一发酵室和用于发酵发酵的第二发酵室的发酵罐。 在第一发酵室中形成的生物气体可以被引入设置在第二发酵室中的提升管中。

公开(公告)号：US10329175B2

公开(公告)日：2019-06-25

申请号：US15311762

申请日：2015-05-28

申请人： Bernhard Wett

发明人： Bernhard Wett

IPC分类号： C02F3/12 ,  C02F3/30 ,  C02F11/12 ,  C02F1/52 ,  C02F3/04 ,  C12P1/04 ,  C02F11/121 ,  C02F11/14

摘要： A method for clarification of wastewater that operates at least two alternating and equal process cycles in two or more clarifiers (1a, 1b), each process cycle consisting of a feed period with concurrent feeding and discharging and a reset period in which excess sludge is removed into a thickener (2a, 2b) and the remaining sludge blanket gets homogenized and pre-settled, wherein at each point of time in at least one clarifier (1a, 1b) the feed period is performed.

公开(公告)号：US10322359B2

公开(公告)日：2019-06-18

申请号：US15568698

申请日：2016-04-25

申请人： Bernhard Wett

发明人： Bernhard Wett

IPC分类号： B01D21/24 ,  F04F10/00 ,  B01D21/34

摘要： The invention relates to a method for draining water from a tank (22), more particularly a clarification tank, wherein water is optionally drained via a draining apparatus while maintaining a substantially constant liquid level (23).

公开(公告)号：US20230032106A1

公开(公告)日：2023-02-02

申请号：US17789902

申请日：2020-12-29

申请人： Bernhard Wett

发明人： Bernhard Wett

IPC分类号： C02F3/12 ,  B01D21/00 ,  B01D21/02 ,  B01D21/24

摘要： Various aspects of the present disclosure are directed to sewage treatment plants and methods of operating sewage treatment plants. In one example embodiment, the sewage treatment plant includes a clarifier having an aeration region with a vent opening to blow in oxygenous gas for mixing water to be clarified and a settling region with an outlet. The sewage treatment plant further includes a wall system that delimits the at least one aeration region from the at least one settling region by the wall system. The wall system has a channel system which has at least one first opening leading to the aeration region in the region of the water level and a sludge removal device of the channel system in the region of a lower wall of the clarifier for transporting solids-rich water from the settling region into the aeration region.

公开(公告)号：US20220289603A1

公开(公告)日：2022-09-15

申请号：US17654790

申请日：2022-03-14

申请人： Bernhard Wett ,  Sudhir Murthy ,  Maureen O'Shaughnessy ,  Hampton Roads Sanitation District ,  D.C. Water and Sewer Authority

发明人： Maureen O'Shaughnessy ,  Christine deBarbadillo ,  Charles Bott ,  Haydee De Clippeleir ,  Bernhard Wett ,  Sudhir Murthy

IPC分类号： C02F3/12 ,  C02F3/02

摘要： This disclosure relates to physical selection, deselection or outselection for smaller, less dense, sheared or compressed particles in sludge, wherein the first deselection step occurs at the reactor or at a clarification step, by separately deselecting for such particles and then a second deselection step occurs in an external selector. This double deselection promotes the more efficient removal of slow settling particles, while simultaneously allowing for maintenance of multiple solids residence times for fast and slow growing organisms. The deselection in a clarifier occurs typically at the periphery of the tank or at the surface of a blanket using a positive or negative pressure device. Structures such as slotted or perforated plates, pipes or manifolds can be used to assist in such deselection. Baffles can also be used for such deselection.