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公开(公告)号：US20250115493A1
公开(公告)日：2025-04-10
申请号：US18377587
申请日：2023-10-06
Applicant: HACH COMPANY
Inventor： Vishnu RAJASEKHARAN , Matthew GRAY , Russell YOUNG
IPC: C02F1/00 , C02F1/68 , C02F101/10
Abstract: A method for controlling a hydrogen sulfide concentration of a wastewater stream, the method including measuring a hydrogen sulfide concentration in one phase of the wastewater stream. At least one additional parameter of the wastewater stream is measured, and a hydrogen sulfide concentration of the other phase of the wastewater stream is calculated with a mathematical model that characterizes the hydrogen sulfide concentration in the other phase based on a set of variables that includes the measured hydrogen sulfide concentration in the one phase and the measured at least one additional parameter. Based on the calculated hydrogen sulfide concentration of the other phase, a treatment dosage of a treatment agent that reduces the hydrogen sulfide concentration of the wastewater stream is determined and applied to the wastewater stream.
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公开(公告)号：US20180292348A1
公开(公告)日：2018-10-11
申请号：US15766806
申请日：2016-10-07
Applicant: HACH COMPANY
Inventor： Corey SALZER , Vishnu RAJASEKHARAN , Dan KROLL , John LEE
IPC: G01N27/404 , G01N27/49 , G01N33/18 , G01N27/407
Abstract: An embodiment provides an amperometric sensor, including: a housing containing an inner fill solution; an electrode bathed in the inner fill solution; and a membrane in intimate contact with the electrode; the electrode being formed as a non-compact or porous structure on the membrane; whereby a spatial relationship of the electrode and the membrane is constant. Other embodiments are described and claimed.
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3.发明公开公开(公告)号：US20230202889A1
公开(公告)日：2023-06-29
申请号：US18087375
申请日：2022-12-22
Applicant: HACH COMPANY
Inventor： Vishnu RAJASEKHARAN , Dan KROLL , Matthew GRAY
CPC classification number: C02F3/006 , C02F3/30 , C02F2209/34
Abstract: Methods and systems for controlling nitrous oxide production in a wastewater treatment facility in which wastewater is treated with microbes in a biological reactor. Nitrous oxide production can be controlled by determining an amount of two or more nutrients in the biological reactor, calculating a value that represents a comparison of the values, comparing the calculated value to a threshold value, and optionally taking a corrective action to reduce nitrous oxide production based on the comparison. In one aspect, nitrous oxide production can be controlled by determining an amount of ammonium in the biological reactor, determining an amount of a nitrogen compound that can include nitrite, nitrate, and/or hydroxylamine, calculating a value that compares the amount of ammonium to the amount of the nitrogen compound, and taking a corrective action that changes a system parameter to reduce the nitrous oxide production if the calculated value surpasses a threshold limit.
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公开(公告)号：US20230122443A1
公开(公告)日：2023-04-20
申请号：US18081996
申请日：2022-12-15
Applicant: HACH COMPANY
Inventor： Brian Alan HARMON , Gregory James LIPINSKI , Joseph Rockstan WILLIAMS , Theophilus Brian MOONEY , Timothy A. HIGGINS , Dan Jonathan KROLL , Vishnu RAJASEKHARAN , Corey Alan SALZER
Abstract: An embodiment provides a method for transferring information from at least one instrument to an application, including: establishing a central protocol structure, wherein the central protocol structure defines a format for information transmitted utilizing the central protocol structure; transmitting over a short-range wireless communication channel information from the at least one device to the application, wherein the information is formatted in a broadcast packet in view of the central protocol structure; receiving, at the application, information from the at least one device; and performing, within the application, an action with respect to the information within the application, wherein the performing comprises deciphering the information contained in view of the central protocol structure.
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