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公开(公告)号：US11320411B2
公开(公告)日：2022-05-03
申请号：US16288925
申请日：2019-02-28
Inventor： Paul A. Solomon , Thomas Kirchstetter
Abstract: The invention relates to a device for measuring, in near-real-time, the level of black carbon, brown carbon, organic carbon, total carbon and CO2 in air. The device also provides for a direct calculation of aerosol angstrom coefficient as well as estimation of emissions rates of black carbon or brown carbon from nearby combustion sources.
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22.发明授权公开(公告)号：US11255783B2
公开(公告)日：2022-02-22
申请号：US16556726
申请日：2019-08-30
Applicant: BOARD OF TRUSTEES OF THE UNIVERSITY OF ARKANSAS , GARVER, LLC , THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE ADMINISTRATOR OF U.S. ENVIRONMENTAL PROTECTION AGENCY
Inventor： Julian Fairey , Thien Duc Do , Ashley Pifer , David Wahman
Abstract: This invention relates generally to a system and process for early detection of biological ammonia oxidation in water utilizing a fluorescence-based sensor and process. Various embodiments are configured to read increases in a fluorescence excitation-emission wavelength pair that is responsive to a period of time (days to weeks or even longer) prior to the onset of biological ammonia oxidation, which is considered to be a nitrification event. Fluorescence excitation/emission pairs that have proven to be reliable include a fluorescence excitation wavelength of about 230 nm and an emission wavelength of about 345 nm and an excitation wavelength of 325 and an emission wavelength of 470. The system and process enable drinking water utilities to improve management of its distribution systems and facilitate earlier corrective actions, resulting is less loss of treated water through flushing and other tangible benefits.
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公开(公告)号：US20210371304A1
公开(公告)日：2021-12-02
申请号：US17386228
申请日：2021-07-27
Applicant: U.S. Environmental Protection Agency
Inventor： HODON RYU , HYOUNGMIN WOO
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.
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公开(公告)号：US11060896B2
公开(公告)日：2021-07-13
申请号：US16690475
申请日：2019-11-21
Applicant: GOVERNMENT OF THE UNITED STATES AS REPRESENTED BY THE ADMINISTRATOR OF THE U.S. ENVIRONMENTAL PROTECTION AGENCY , URBANALTA CORP
Inventor： Ruben Kertesz , Daniel J. Murray, Jr. , Michael Bolan , Ryan Anderson , Chunsheng Fang
Abstract: A flow imaging and monitoring system for synchronized management of wide area drainage that includes an interposer for supporting monitoring and management equipment in a manhole, a module for illuminating water flowing in pipes at the base of the manhole, a module for monitoring responses to reflected light, a sealed and rechargeable battery pack, and a data analysis and management system to interpret data streams in real time. The interposer can be adjusted to fit the diameter of the manhole and can be adjusted to be placed under the manhole cover. The module for illuminating the flowing water can be adjusted to generate various frequencies. The support structures for the modules can be adjusted for varying pitch, roll and yaw with respect to the manhole. The data analysis and management system is supported by cloud computing.
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公开(公告)号：US20200094201A1
公开(公告)日：2020-03-26
申请号：US15379905
申请日：2016-12-15
Applicant: U.S. Environmental Protection Agency
Inventor： Christopher Ruybal , Dominic DiGiulio
Abstract: A rapid and continuous separator or equilibrator to separate a gas from a liquid includes a venturi and injector, a mixer and a free overfall stream to separate a gas from a liquid. The injector introduces a carrier medium into the liquid which provides a reservoir for the gas to diffuse into as the liquid and carrier make a single transit through the apparatus. The separator was developed to enable real-time estimation of methane concentrations in ground water during purging. Real-time monitoring allows evaluation of trends during water well purging, spatial trends between water wells, and temporal comparisons between sampling events. These trends may be a result of removal of stored casing water, pre-purge ambient borehole flow, formation physical and chemical heterogeneity, or vertical flow outside of well casing due to poor bentonite or cement seals. Real-time information in the field can help focus an investigation, aid in determining when to collect a sample, save money by limiting costs (e.g. analytical, sample transport and storage), and provide an immediate assessment of local methane concentrations, Four domestic water wells, one municipal water well, and one agricultural water well were sampled for traditional laboratory analysis and compared to the field separator or equilibrator results. Applying a paired t-test comparing the new separator or equilibrator method and traditional laboratory analysis yielded a p-value 0.383, suggesting no significant difference between the two methods for the current study. Additional field and laboratory-based experimentation and potential modification of this device are necessary to justify use beyond screening at this time. However, early separator or equilibrator use suggests promising results and applications.
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Patent Agency Ranking
26.发明申请公开(公告)号：US20200017375A1
公开(公告)日：2020-01-16
申请号：US16520880
申请日：2019-07-24
Applicant: U.S. Environmental Protection Agency
Inventor： HODON RYU , HYOUNGMIN WOO
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.
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公开(公告)号：US20190293538A1
公开(公告)日：2019-09-26
申请号：US16348790
申请日：2017-11-09
Applicant: THE BOARD OF TRUSTEES OF THE UNIVERSITY OF ILLINOIS , THE REGENTS OF THE UNIVERSITY OF CALIFORNIA , ACLIMA, INC. , U.S. ENVIRONMENTAL PROTECTION AGENCY
Inventor： Igor PAPROTNY , Omid MAHDAVIPOUR , Dorsa FAHIMI , Lara GUNDEL , Richard WHITE , Paul SOLOMON , Ben GOULD , Frederick DOERING , Dave WOLSEY , Melissa LUNDEN , Stacy OZAKI
Abstract: Microfabricated PM sensors measure concentrations of particulate matter (PM) in air. Some sensors improve the accuracy of measurements by accounting for the effect of ambient conditions (e.g., temperature or humidity) on mass-sensitive elements employed to determine a mass of the PM in a stream of air. Some sensors improve the accuracy of measurements by controlling humidity in the stream of air measured by mass-sensitive elements. Some sensors employ a plurality of mass-sensitive elements to extend the useful life of the PM sensor. Some sensors employ one or more mass-sensitive elements and heating elements to cause deposition and allow measurement of different sizes of PM. Some sensors can measure mass concentration of coarse PM in addition to fine PM in a stream of air. Some sensors control the flow rate of a stream of air measured by mass-sensitive elements. Some sensors include features to mitigate electromagnetic interference or electromagnetic signal loss.
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公开(公告)号：US10245558B2
公开(公告)日：2019-04-02
申请号：US15183115
申请日：2016-06-15
Inventor： Dibakar Bhattacharyya , Vasile Smuleac , Rajender S. Varma , Subhas K. Sikdar
IPC: B01D67/00 , B01D69/14 , B01D71/02 , B01D71/34 , C02F1/44 , B01D69/12 , B01D69/10 , B01D71/40 , C02F1/70 , C02F101/36 , C02F103/06 , B01D71/44 , B82Y30/00 , B82Y40/00 , C02F1/00
Abstract: A nanocomposite membrane includes a macroporous polymer membrane having a plurality of pores. A plurality of metal nanoparticles are synthesized and immobilized within those plurality of pores. The nanoparticles are reduced and capped with a green reducing and capping agent such as green tea extract.
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29.发明申请公开(公告)号：US20180312414A1
公开(公告)日：2018-11-01
申请号：US16022153
申请日：2018-06-28
Applicant: U.S. Environmental Protection Agency
Inventor： Anthony Todd Zimmer
Abstract: A particle for emulating pollutant tracking in water has a florescent core. A semitransparent shell is formed around the florescent core.
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公开(公告)号：US20180251384A1
公开(公告)日：2018-09-06
申请号：US15906157
申请日：2018-02-27
Applicant: U.S. Environmental Protection Agency
Inventor： Darren A. LYTLE , Mallikarjuna N. NADAGOUDA
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.
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