Method for automotive dose control of liquid treatment chemicals

A method for automatic dose control of a liquid treatment chemical during a liquid treatment process within a treatment system, the system having an influent flow and an effluent flow, the method comprising:

• a. measuring the liquid flow rate through the treatment system and generating a liquid flow rate signal from the measurement and adjusting the liquid flow rate signal by a flow pace multiplier;
• b. measuring the concentration of a chemical through the treatment system and generating a chemical concentration signal from the measurement;
• c. transmitting the signal generated from step (a) and the signal generated from step (b) to a chemical dosing controller;
• d. automatically calculating the dosage of a chemical from signals supplied to the chemical dosing controller;
• e. transmitting an output signal from the chemical dosing controller to a chemical feeding system, the output signal based on dosage calculated in step (d);
• f. releasing the chemical from step d into influent flow in response to output signal of step (e);
• and
• g. repeating steps (a)-(f) continuously during the liquid treatment process.

A method for automatic dose control of nitrate-nitrogen during a water treatment process within a denitrification treatment system using a chemical source of organic carbon as the feed chemical, the system having an influent flow and an effluent flow, the method comprising:

• a. measuring the water flow rate at a site wherein the site is selected from any one of a group of sites consisting of an influent flow site, an effluent flow site or a combination thereof and generating a water flow rate signal from the measurement;
• b. measuring the concentration of a chemical at a site wherein the site is an influent flow site, an effluent flow site or a combination thereof, and generating a chemical concentration signal from the measurement;
• c. transmitting the signal generated from step (a) and the signal generated from step (b) to a chemical dosing controller;
• d. automatically adjusting the nitrate/nitrogen signal by at least one adjustable dose factor;
• e. automatically calculating the dosage of the feed chemical from adjusted signals supplied to chemical dosing controller;
• f. transmitting an output signal from the chemical dosing controller to a chemical feeding system, the output signal based on dosage calculated in step (e);
• g. releasing the feed chemical into the influent flow in response to the output signal of step (f);
• and
• h. repeating steps (a)-(g) continuously during the denitrification process.

A method for automatic dose control of nitrate-nitrogen during a water treatment process within a denitrification treatment system using a chemical source of organic carbon as the feed chemical, the system having an influent flow and an effluent flow, the method comprising:

• a. measuring the water flow rate at a site wherein the site is an influent flow site, an effluent flow site or a combination thereof and generating a water flow rate signal from the measurement;
• b. measuring the concentration of a chemical at a site wherein the site is selected from any one of a group of sites consisting of an influent flow site, an effluent flow site or a combination thereof, and generating a chemical concentration signal from the measurement;
• c. transmitting the signal generated from step (a) and the signal generated from step (b) to a chemical dosing controller wherein the water flow rate signal of step (a) is automatically adjusted by a flow pace multiplier;
• d. automatically adjusting the nitrate/nitrogen signal by at least one adjustable dose factor;
• e. automatically calculating the dosage of the feed chemical from adjusted signals supplied to chemical dosing controller;
• f. transmitting an output signal from the chemical dosing controller to a chemical feeding system, the output signal based on dosage calculated in step (e);
• g. releasing the feed chemical into the influent flow in response to the output signal of step (f);
• and
• h. repeating steps (a)-(g) continuously during the denitrification process.

A method for automatic dose control of nitrate-nitrogen during a water treatment process within a denitrification treatment system using a chemical source of organic carbon as the feed chemical, the system having an influent flow and an effluent flow, the method comprising:

• a. measuring the water flow rate through the treatment system and generating a water flow rate signal from the measurement;
• b. measuring the concentration of a chemical at a site wherein the site is an effluent flow site, selecting a setpoint for effluent nitrate-nitrogen and generating an effluent flow concentration signal from the measurement of concentration of nitrate-nitrogen in the effluent flow;
• c. transmitting the signal generated from step (a) and the signal generated from step (b) to a chemical dosing controller;
• d. calculating the difference between the effluent concentration of nitrate-nitrogen and the setpoint to generate a control response, adjusting the control response by one or more sensitivity factors and automatically incorporating the adjusted control response into the calculation for the dosage of the feed chemical wherein the dosage is used to generate a modified output sign which is transmitted from the chemical dosing controller to the chemical feeding system;
• e. releasing the feed chemical into the influent flow in response to the output signal of step (f):
• and
• h. repeating steps (a)-(e) continuously during the denitrification process.

A method for automatic dose control of nitrate-nitrogen during a water treatment process within a denitrification treatment system using a chemical source of organic carbon as the feed chemical, the system having an influent flow and an effluent flow, the method comprising:

• a. selecting a setpoint for effluent nitrate-nitrogen;
• b. measuring the water flow rate at an effluent flow site, and generating a water flow rate signal from the measurement;
• c. measuring the concentration of nitrate-nitrogen in the effluent flow and generating a chemical concentration signal from the measurement;
• d. transmitting the signal generated from step (b) and the signal generated from step (c) to a chemical dosing controller;
• e. calculating the difference between the effluent concentration of nitrate-nitrogen and the setpoint to generate a control response;
• f. adjusting the control response by one or more sensitivity factors;
• g. automatically calculating the dosage of the feed chemical from the control response;
• h. transmitting output signal from chemical dosing controller to the chemical feeding system, the output signal based on dosage calculated in step (g);
• i. releasing the feed chemical into influent flow in response to output signal of step (h);
• and
• j. repeating steps (a)-(i) continuously during the denitrification process.

A method for automatic dose control of nitrate-nitrogen during a water treatment process within a denitrification treatment system using a chemical source of organic carbon as the feed chemical, the system having an influent flow and an effluent flow, the method comprising:

• a. selecting a setpoint for effluent nitrate-nitrogen;
• b. measuring the water flow rate through the treatment system and generating a water flow rate signal from the measurement, wherein the water flow rate signal is adjusted by a flow pace multiplier;
• c. measuring the concentration of nitrate-nitrogen at an effluent flow site and generating a chemical concentration signal from the measurement;
• d. transmitting the signal generated from step (b) and the signal generated from step (c) to a chemical dosing controller;
• e. calculating the difference between the effluent concentration of nitrate-nitrogen and the setpoint to generate a control response;
• f. adjusting the control response by one or more sensitivity factors;
• g. automatically calculating the dosage of the feed chemical from the control response;
• h. transmitting output signal from chemical dosing controller to the chemical feeding system, the output signal based on dosage calculated in step (g);
• i. releasing the feed chemical into influent flow in response to output signal of step (h);
• and
• j. repeating steps (a)-(i) continuously during the denitrification process.

A method for automatic dose control of a liquid treatment chemical during a treatment process within a liquid treatment system using a feed chemical, the system having an influent flow and an effluent flow, the method comprising:

• a. selecting a setpoint for a chemical in the effluent flow;
• b. measuring the liquid flow rate through the treatment system and generating a liquid flow rate signal from the measurement;
• c. measuring the concentration of the chemical of step (a) in the influent flow and generating an influent chemical concentration signal from the measurement;
• d. measuring the concentration of the chemical of step (a) in the effluent flow and generating an effluent chemical concentration signal from the measurement;
• e. transmitting the signal generated from step (b) to a chemical dosing controller and generating a primary control response;
• f. adjusting the primary control response by a flow pace modifier;
• g. transmitting the signal generated from step (c) to a chemical dosing controller and generating a secondary control response;
• h. adjusting the secondary control response by an adjustable dose factor;
• i. transmitting the signal from step (d) to the chemical dosing controller and calculating the difference between the effluent chemical concentration and the setpoint to generate a tertiary control response;
• j. adjusting the tertiary control response by one or more sensitivity factors;
• k. continuously calculating the dosage of the feed chemical from the primary control response and secondary control response while incorporating the tertiary control response from step (f) after a reset period;
• l. transmitting an output signal from chemical dosing controller to a chemical feeding system, the output signal based on dosage calculated in step (k);
• m. releasing a feed chemical into influent flow in response to output signal of step (l);
• and
• n. repeating steps (a)-(m) continuously during the treatment process.