Control system for nitrogen and phosphorus removal
AssigneeEnvironmental Operating Solutions, Inc.
InventorsSamuel Augustine Ledwell, Albert Paul Togna
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Abstract
A central controller is used in a treatment method and system for removing at least one of nitrogen or phosphorus from wastewater. Based on data received from a plurality of sensors, each of which is coupled to a component of a wastewater treatment system, a control signal is sent from the central controller to at least one chemical delivery system, which dispenses at least one chemical compound into the wastewater in an amount effective to reduce the level of nitrogen or phosphorus in the wastewater.
Claims16
A method of removing at least one of nitrogen or phosphorus from wastewater, comprising:
- collecting data from a plurality of sensors, wherein each sensor measures at least one parameter in a selector of a wastewater treatment system;
- receiving the data from the plurality of sensors in a central controller, wherein the central controller comprises a plurality of control loops, wherein each control loop is adapted to control a single water treatment process in a selector and i) at least two of the control loops receive data from at least two common sensors coupled to different selectors of the wastewater treatment system and/or ii) at least one control loop receives data from at least one other control loop, wherein the data received from the plurality of sensors are utilized to determine a level of a liquid chemical compound required to adjust the level of nitrogen or phosphorus present in the wastewater to a preselected target level;
- and
- sending a control signal from the central controller to at least one liquid-chemical delivery system to dispense an amount of the chemical compound into the wastewater effective to achieve the preselected target level of nitrogen or phosphorus in the wastewater.
A water treatment system for removing at least one of nitrogen or phosphorus from wastewater comprising:
- a plurality of sensors, wherein each sensor is coupled to a selector of the water treatment system;
- at least one liquid-chemical delivery system for delivering to the wastewater at least one liquid chemical compound for removing nitrogen or phosphorus in the wastewater;
- and
- a central controller comprising a plurality of control loops,
- wherein each control loop is configured to control a denitrification process, a chemical phosphorus removal process, or an enhanced biological phosphorus removal process, and at least one of the following conditions are met:
- i) at least two of the control loops are adapted to receive signals from at least two common sensors coupled to different selectors of the water treatment system;
- ii) at least one control loop is adapted to receive a signal from another control loop for determining an amount of at least one liquid chemical compound to be dispensed into the wastewater to remove nitrogen or phosphorus in the wastewater.
Dependencies are inferred from the claim text.