公开(公告)号：US11345617B2

公开(公告)日：2022-05-31

申请号：US15906157

申请日：2018-02-27

Applicant: U.S. Environmental Protection Agency

Inventor： Darren A. Lytle ,  Mallikarjuna N. Nadagouda

IPC: C02F1/30 ,  H05B6/80 ,  C02F11/131

Abstract: A method and apparatus for treating residuals or waste streams from a plant, such as a drinking water treatment plant. The method includes the steps of obtaining plant residuals or waste streams from a water treatment plant and irradiating the plant residuals or waste streams using microwave radiation from a microwave source. The method also includes the step of drying the plant residuals or waste streams to a predetermined moisture, volume, or weight content reduction and disposing of the same.

公开(公告)号：US11104591B2

公开(公告)日：2021-08-31

申请号：US16520880

申请日：2019-07-24

Applicant: U.S. Environmental Protection Agency

Inventor： Hodon Ryu ,  Hyoungmin Woo

IPC: C02F1/32 ,  C02F1/72 ,  A61L2/26 ,  A61L2/10 ,  A61L2/08

Abstract: A point-of-use (POU) water filtration device has a container. A plurality of channels is formed within the container, water entering the container flowing through the plurality of channels. A plurality of Ultraviolet (UV) Light Emitting Diodes (LEDs) is provided. Each of the plurality of UV LEDs illuminating UV light down an associated channel of the plurality of channels.

公开(公告)号：US10316506B2

公开(公告)日：2019-06-11

申请号：US14335567

申请日：2014-07-18

Applicant: U.S. Environmental Protection Agency ,  Sustainable Streams, LLC

Inventor： Robert J. Hawley ,  James A. Goodrich ,  Katherine R. MacMannis

IPC: E03F5/10

Abstract: Aspects of a detention pond retrofit device for detention basin outlet control provide structures designed to throttle stormwater flow and maintain the rate at which water is discharged from the system below Qcritical, the flow rate at which erosion and down cutting of the receiving stream would begin, based on channel morphology and bed material resistance. The primary goal of the device is to induce increased flow detention during low to moderate rain events, while providing similar hydraulic performance during large events to that of the detention basin performance prior to the installation of the retrofit unit. This is achieved through a “T” or “Y” design with split flow paths, in which the lower path is hydraulically restricted through the installation of structures while the upper path is unrestricted.

公开(公告)号：US20180050906A1

公开(公告)日：2018-02-22

申请号：US15240396

申请日：2016-08-18

Applicant: Government of the United States as Rep. by the Adm. of the U.S. Environmental Protection Agency

Inventor： Rajender S. VARMA ,  Nasir BAIG ,  Mallikarjuna NADAGOUDA

IPC: C01B3/04 ,  C07C209/36 ,  C01B13/02 ,  B01J23/46 ,  B01J31/06 ,  B01J35/00 ,  B01J37/03 ,  B01J37/02 ,  B01J37/00 ,  B01J19/12

CPC classification number: C01B3/042 ,  B01J19/126 ,  B01J23/44 ,  B01J23/462 ,  B01J23/745 ,  B01J31/061 ,  B01J35/002 ,  B01J37/009 ,  B01J37/0236 ,  B01J37/035 ,  C01B13/0207 ,  C01B2203/0277 ,  C07C209/365 ,  Y02E60/364 ,  Y02P20/582 ,  C07C211/52

Abstract: A process and catalyst for the in situ generation of hydrogen via the microwave irradiation of a ruthenium chitosan composite catalyst has enabled the convenient reduction of nitro compounds in aqueous medium.

公开(公告)号：US20160090617A1

公开(公告)日：2016-03-31

申请号：US14496887

申请日：2014-09-25

Applicant: U.S. ENVIRONMENTAL PROTECTION AGENCY

Inventor： VICENTE JAMES GALLARDO

IPC: C12Q1/24

CPC classification number: C12Q1/24

Abstract: A device and method for concentrating microorganisms in large volumes of turbid water. When particulate builds up at the inlet filter header and pressure increases, filtrate that has collected within the filtrate reservoir serves as backflush fluid. The hollow fiber filter cartridge is backflushed as the pump reverses and filtrate flows from the filtrate reservoir, back through the hollow fiber filter cartridge, and out the inlet filter header, thereby dislodging the accumulated particulate. Elution solution is pumped though the device to remove microorganisms that may have adhered to the filter fibers and tubing. The retentate is then recovered by forward flushing the filter with eluting solution so that the retentate is sent to the off-line retentate sample container. There, the retentate sample is isolated and prevented from re-entering the hollow fiber filter cartridge. The inlet filter header therefore serves as an in-line pre-filter.

Abstract translation: 用于将微生物浓缩在大体积混浊水中的装置和方法。 当颗粒在入口过滤器集管上积聚并且压力增加时，在滤液容器内收集的滤液用作反冲洗液体。 中空纤维滤筒由于反向而被反冲洗，滤液从滤液储存器中流过中空纤维滤筒，并从出口滤芯上排出，从而排出积聚的颗粒物。 洗脱溶液通过该装置被泵送以除去可能附着在过滤纤维和管道上的微生物。 然后通过用洗脱溶液前进冲洗过滤器来回收滞留物，使得滞留物被送到离线滞留样品容器。 在那里，隔离样品被隔离并防止再次进入中空纤维滤筒。 入口过滤器接头因此用作直列式预过滤器。

公开(公告)号：US20160046514A1

公开(公告)日：2016-02-18

申请号：US14459277

申请日：2014-08-13

Applicant: U.S. ENVIRONMENTAL PROTECTION AGENCY

Inventor： Daniel John Williams

IPC: C02F1/68

CPC classification number: C02F1/74 ,  C02F1/001 ,  C02F2201/008

Abstract: In the drinking water industry, pilot plants have played a big role in assisting water professionals, utilities, and engineering firms in generating information about the behavior of large full scale systems. Due to the identification of new contaminants, stringent regulations, and demand for improved water quality the demand for novel water treatment challenges across North America have significantly increased. A portable evaluation pilot skid (PEPS) accommodates all water qualities. A vent valve screen is mounted inside the contactor with holes large enough to prevent clogging. Air is introduced into the contactor prior to the screen. The screen is mounted such that it breaks the air into small bubbles creating the effect of a stone diffusor. Air flow is easily adjusted with a needle valve.

Abstract translation: 在饮用水行业，试点工程在协助水专业人员，公用事业和工程公司生成关于大型全面系统行为的信息方面发挥了重要作用。 由于新污染物的鉴定，严格的法规和对改善水质的需求，北美地区对新的水处理挑战的需求显着增加。 便携式评估飞行员滑行（PEPS）适应所有的水质。 一个排气阀屏幕安装在接触器内部，其孔足够大以防止堵塞。 在屏幕之前将空气引入接触器。 屏幕被安装成使得其将空气分解成小的气泡，产生石头扩散器的作用。 气针可以用针阀轻松调节。