Method for monitoring and controlling biological activity in fluids
AssigneeBioChem Technology, Inc.
InventorsJaw Fang Lee, Xin Yang, Sergey K. Maneshin, Terrance J. Mah
Life of this patent
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Abstract
A method of monitoring a microbiological process in a fluid supply involving isolation of a fluid sample from a fluid supply, measuring the pH of the fluid sample at selected time intervals, then calculating changes in pH, if any, to determine a pH variation rate for the sample. The dissolved oxygen in the sample is also measured at selected time intervals substantially synchronously with the pH measurements, and changes in dissolved oxygen, if any, are calculated to determine a biological oxygen consumption rate for the sample.
Claims20
A method of monitoring a microbiological process in a fluid supply having a microbial population comprising:
- a) isolating a fluid sample from said fluid supply;
- b) measuring the pH of said fluid sample at selected time intervals;
- c) determining a pH variation rate for said sample by calculating changes in pH, if any;
- d) measuring amounts of dissolved oxygen in said fluid sample at selected time intervals substantially synchronously with said measuring of pH;
- and
- e) determining a biological oxygen consumption rate for said sample by calculating changes in dissolved oxygen, if any.
A method of monitoring a microbiological process in a fluid supply having a microbial population comprising:
- a) isolating a fluid sample from said fluid supply;
- b) measuring the pH of said fluid sample at selected time intervals;
- c) analyzing changes in pH, if any, to determine a pH variation rate for said sample;
- d) measuring amounts of dissolved oxygen in said fluid sample at selected time intervals substantially synchronously with said measuring of pH;
- e) analyzing changes in dissolved oxygen, if any, to determine a biological oxygen consumption rate for said sample;
- and
- f) repeating steps b) through e) at selected time intervals and comparing newly determined pH variation rate(s) and biological oxygen consumption rate(s) with previously determined pH variation rate(s) and biological oxygen consumption rate(s);
- wherein step f) determines whether levels of organic and inorganic compounds in said fluid supply are greater or less than their respective 2K.sub.s concentrations.
A method of monitoring and controlling a microbiological process in a fluid supply having a microbial population comprising:
- a) isolating a fluid sample from said fluid supply;
- b) measuring the pH of said fluid sample at selected time intervals;
- c) analyzing changes in pH, if any, to determine a pH variation rate for said sample according to the following formula:
- pHPR=(.DELTA.pH)/(.DELTA.t)
- wherein pHPR is said pH variation rate, .DELTA.pH is a change in pH and .DELTA.t is a change in time;
- d) measuring amounts of dissolved oxygen in said fluid sample at selected time intervals substantially synchronously with said measuring of pH;
- e) analyzing changes in dissolved oxygen, if any, to determine a biological oxygen consumption rate for said sample according to the following formula:
- BOCR=(.DELTA.D.O.)/(.DELTA.t)
- wherein BOCR is said biological consumption rate, .DELTA.D.O. is a change in dissolved oxygen and .DELTA.t is a change in time;
- f) repeating steps b) through e) at selected time intervals in comparing newly determined pH variation rate(s) and biological oxygen consumption rate(s) with previously determined pH variation rate(s) and biological oxygen consumption rate(s) to determine whether levels of organic and inorganic compounds in said fluid supply are greater or less than their respective 2K.sub.s concentration;
- and
- g) performing a control step in response to determined levels of organic and inorganic compounds in said fluid supply based on their respective 2K.sub.s concentrations.
Dependencies are inferred from the claim text.