Autonomous chemical dosing system and methods of use thereof

Patent metadata

Field	Value
Publication number	US-2023150836-A1
Application number	US-202117799436-A
Country	US
Kind code	A1
Filing date	Feb 12, 2021
Priority date	Feb 12, 2020
Publication date	May 18, 2023
Grant date	—

Abstract

A wastewater treatment management system including a plurality of monitoring stations, a treating station for introducing a treating agent to wastewater, and a principal processing facility for controlling a dose of the treating agent. A system configured to treat a wastewater stream collection system including a source of a treating agent, a metering valve, a sensor, and a controller operatively connected to the metering valve and the sensor. A non-transitory computer-readable medium including instruction that instruct a controller to perform a method of controlling addition of a treating agent into a wastewater stream collection system. A controller for a system configured to treat odor and control corrosion in a wastewater stream collection system that is operatively connectable to a metering valve for administering a treating agent to a wastewater stream collection system.

First claim

1 . A wastewater treatment management system, comprising:
a plurality of monitoring stations each situated in a wastewater stream collection system, each of the monitoring stations having at least one sensor configured to determine a level of at least one target species at respective locations of the wastewater stream collection system, and to transmit a representation of the determined level of the at least one target species; a treating station disposed remotely from at least one of the plurality of monitoring stations and configured to introduce at least one treating agent into the wastewater stream collection system at a predetermined dosage rate; and a principal processing facility disposed remotely from at least one of the plurality of monitoring stations, the principal processing facility configured to receive the transmitted representation and to determine an adjusted dosage of the at least one treating agent based on data retrieved from a public database, the principal processing facility further configured to transmit an indicator of the adjusted dosage to the treating station; wherein the treating station is further configured to receive the indicator of the adjusted dosage and introduce the at least one treating agent at the adjusted dosage.

2 . The system of claim 1 , wherein the at least one treating agent comprises at least one of an anthraquinone, a pH-adjusting compound, a nitrite, a nitrate, sodium chlorite, hydrogen peroxide, or an iron salt solution.

3 . The system of claim 1 , wherein each of the plurality of monitoring stations comprises a cellular modem configured to transmit the representation to the processing facility according to a predetermined schedule.

4 . The system of claim 1 , comprising a plurality of treating stations, each treating station configured to introduce the at least one treating agent into the wastewater collection system at respective dosage rates.

5 . The system of claim 4 , wherein the principal processing facility is configured to adjust operation of one or more of the plurality of treating stations to compensate for undesired operation of one or more other of the plurality of treating stations.

6 . The system of claim 1 , wherein the data includes environmental data regarding one or more of precipitation, outdoor temperature, outdoor relative humidity, wind speed, wind direction, and atmospheric pressure.

7 . The system of claim 1 , wherein the at least one sensor is configured to determine a concentration of one of H 2 S or a precursor for H 2 S in one of air or water within the collection system.

8 . The system of claim 1 , further comprising an aeration system configured to deliver an oxygen containing gas into the wastewater.

9 . A method of providing odor and/or corrosion control in a wastewater stream collection system, the method comprising:
measuring at least one process variable in a wastewater stream collection system; retrieving data for at least one environmental variable from a source of environmental data; determining a treatment dose of a treating agent based on an adjustment factor, the adjustment factor determined responsive to a measurement of the at least one process variable and data received for the at least one environmental variable, the treatment dose being in an amount sufficient to control a concentration of an odorous species in a headspace of the wastewater stream collection system to be less than a predetermined target value at a point in the wastewater stream collection system; and administering the treatment dose to wastewater in the wastewater stream collection system.

10 . The method of claim 9 , wherein the at least one process variable is selected from the group consisting of volume of the treating agent previously administered, concentration of the odorous species in the headspace, wastewater composition, wastewater pH, wastewater temperature, wastewater flow rate, wastewater conductivity, wastewater TSS, wastewater TDS, wastewater ORP, sulfide concentration in the wastewater, treating agent residual in the wastewater, wastewater BOD, wastewater COD, and humidity in the collection system.

11 . The method of claim 9 , wherein the at least one environmental variable is selected from the group consisting of precipitation outdoor temperature, outdoor relative humidity, wind speed, wind direction, and atmospheric pressure.

12 . The method of claim 9 , wherein the treatment dose of the treating agent is further based on a baseline dose of the treating agent.

13 . The method of claim 12 , wherein the baseline dose is predicted based on at least one temporal variable.

14 . The method of claim 12 , wherein the baseline dose is manually set.

15 . The method of claim 12 , further comprising predicting the baseline dose of the treating agent from historical data regarding concentrations of the odorous species in the headspace.

16 . The method of claim 15 , wherein the historical data regarding concentrations of the odorous species in the headspace is catalogued by time of day, day of week, month of the year, and annual seasonal data.

17 . The method of claim 12 , wherein the baseline dose and the treatment dose of the treating agent are the same.

18 . The method of claim 9 , wherein the at least one process variable includes a concentration of one or more chemical species in one of air in the collection system or wastewater in the collection system.

19 . A system configured to treat a wastewater stream collection system, the system comprising:
a source of a treating agent connectable to the wastewater stream collection system at a point of administration; a metering valve positioned at the point of administration configured to administer the treating agent to the wastewater stream collection system;
at least one sensor constructed and arranged to measure at least one process variable from the wastewater stream collection system; and a controller operatively connected to the metering valve and the at least one sensor, the controller configured to regulate an administered dose of the treating agent responsive to a measurement of the at least one process variable in combination with data of at least one environmental variable received and historical data from the at least one sensor, the controller programmable to automatically adjust a treatment dose of the treating agent based on an adjustment factor, the adjustment factor determined responsive to a measurement of the at least one process variable and data on the at least one environmental variable, the treatment dose being in an amount sufficient to control a concentration of H 2 S in the wastewater stream collection system to be less than a predetermined target value.

20 . The system of claim 19 , further comprising an aeration system configured to deliver an oxygen containing gas into wastewater in the wastewater stream collection system.

21 . The system of claim 20 , wherein the controller is further configured to regulate a rate or volume of the oxygen containing gas delivered into the wastewater responsive to the measurement of the at least one process variable and/or the at least one environmental variable.

22 . The system of claim 19 , further comprising a receiver of data for the at least one environmental variable.

23 . The system of claim 19 , wherein the at least one process variable is selected from the group consisting of volume of the treating agent previously administered, H2S concentration i

Assignees

• Evoqua Water Tech Llc

Inventors

• Branum Scott
• Gau Marc
• Horst Calvin

Classifications

• C02F2303/02

  Odour removal or prevention of malodour · CPC title

• C02F2209/44

  Time · CPC title

• G05B2219/2605

  Wastewater treatment · CPC title

• C02F2209/05

  Conductivity or salinity · CPC title

• C02F1/722

  Oxidation by peroxides · CPC title