Method for continuously monitoring and controlling alkalinity for environmental purposes using a pCO.sub.2 probe
First Claim
1. A method for continuously monitoring and controlling the total alkalinity attributable to carbon dioxide, bicarbonate ion and carbonate ion in an aqueous solution in which it is desirable to maintain alkalinity near a value customary for drinking water for environmental purposes,said method comprising the steps of(a) sampling the aqueous solution,(b) in a closed system automatically adjusting the pH of the sample to a value of about 3.5,(c) in a closed system detecting with a pCO2 probe the total carbon dioxide of the pH-adjusted sample, the sample having been adjusted to and being maintained at a selected temperature value, and(d) adding a sufficient amount of an alkalinity-controlling chemical to said solution to maintain alkalinity near a value customary for drinking water.
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Abstract
A novel method for continuously monitoring and controlling the total alkalinity attributable to carbon dioxide, bicarbonate ion and carbonate ion such as is found in water and waste water treatment systems and in cooling towers. This method includes the steps of sampling the aqueous solution, adjusting the pH of the sample, detecting with a pCO2 probe the total carbon dioxide of the sample, and adding an alkalinity-controlling chemical to the aqueous solution. Also provided is a method for continuously monitoring this total alkalinity in a natural body of water.
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16 Claims
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1. A method for continuously monitoring and controlling the total alkalinity attributable to carbon dioxide, bicarbonate ion and carbonate ion in an aqueous solution in which it is desirable to maintain alkalinity near a value customary for drinking water for environmental purposes,
said method comprising the steps of (a) sampling the aqueous solution, (b) in a closed system automatically adjusting the pH of the sample to a value of about 3.5, (c) in a closed system detecting with a pCO2 probe the total carbon dioxide of the pH-adjusted sample, the sample having been adjusted to and being maintained at a selected temperature value, and (d) adding a sufficient amount of an alkalinity-controlling chemical to said solution to maintain alkalinity near a value customary for drinking water.
Specification