Methods and system for alkalizing a body of water and removing carbon dioxide, and a dosing station therefor

A system for Carbon Dioxide Removal (CDR) from the atmosphere using a body of water that is in contact with the atmosphere, the system comprising:

• a dosing station, comprising:
• a reservoir containing dissolved, partially dissolved or undissolved, CO2-reactive alkalinity;
• a dispenser for dispensing the CO2-reactive alkalinity in the body of water;
• a controller comprising:
• a processor;
• a memory device;
• computer executable instructions stored in the memory device, for execution by the processor, causing the processor to:
• (1) set an amount of CO2-reactive alkalinity to be added to the body of water, and a rate of dispensing of the amount of CO2-reactive alkalinity to the body of water, the amount of CO2-reactive alkalinity being less than a target amount;
• (2) dispense the amount of the CO2-reactive alkalinity in the body of water at the rate of dispensing;
• (3) during dispensing, monitor the body of water by one or more sensors, and adjust the rate of dispensing so as to ensure measurements of said one or more sensors are within respective predetermined limits;
• (4) estimate a CDR achieved by the dispensing, according to a chemical mass stoichiometry of carbon dioxide reaction with the CO2-reactive alkalinity;
• (5) adjust the estimated CDR from (4) by taking into account a Fequil factor, indicating a fraction of alkalized, CO2-depleted water equilibrated with air, thus determining an adjusted CDR;
• (6) determine a cumulative amount of the CO2-reactive alkalinity that has been dispensed over time to the body of water;
• and
• (7) if the cumulative amount of alkalinity is less than a predetermined target amount of alkalinity to be dispensed to the body of water, repeat the steps (1) to (6) until the predetermined target amount of alkalinity has been dispensed;
• thereby removing carbon dioxide from the atmosphere.

A system for Carbon Dioxide Removal (CDR) from the atmosphere using a body of water that is in contact with the atmosphere, the system comprising:

• a dosing station, comprising:
• a reservoir containing dissolved, partially dissolved or undissolved, CO2-reactive alkalinity;
• a dispenser for dispensing, at a required rate, a required amount of the CO2-reactive alkalinity in the body of water for achieving a permissible target CDR from the atmosphere;
• a controller comprising:
• a processor;
• a memory device;
• computer executable instructions stored in the memory device, for execution by the processor, causing the processor to determine the required amount of the CO2-reactive alkalinity and the permissible target CDR, comprising:
• setting a target CDR;
• (i) estimating an amount of the CO2-reactive alkalinity to be added to the body of water for achieving the target CDR as determined by mass chemical stoichiometry of carbon dioxide reaction with the CO2-reactive alkalinity;
• (ii-1) adjusting the target CDR by taking into account a Fequil factor, indicating a fraction of alkalized water equilibrated with air, thus determining an adjusted target CDR and a corresponding adjusted amount of CO2-reactive alkalinity;
• (iii) monitoring the body of water by one or more sensors, and further limiting the adjusted amount of the CO2-reactive alkalinity and the adjusted target CDR so as to ensure measurements of said one or more sensors are within respective predetermined limits when the further adjusted amount of the CO2-alkalinity is dispensed in the body of water over the given time interval, thus determining a further adjusted amount of the CO2-reactive and a corresponding further adjusted target CDR;
• (iv) setting the further adjusted amount of CO2-reactive alkalinity as the required amount, and the further adjusted target CDR as the permissible target CDR, and determining the required rate of dispensing over the given time interval based on the permissible target CDR and the respective predetermined limits of measurements of said one or more sensors;
• and
• (v) dispensing the required amount of the CO2-reactive alkalinity in the body of water at the required rate, thereby achieving the permissible target CDR from the atmosphere in the given time interval.