Method and apparatus for detecting and classifying contaminants in water

• US 5,646,863 A
• Filed: 10/10/1995
• Issued: 07/08/1997
• Est. Priority Date: 03/22/1994
• Status: Expired due to Fees

• Current Assignee: Stephen G. Morton
• Original Assignee: Stephen G. Morton
• Inventors: Morton, Stephen G.
• Primary Examiner(s): Cosimano, Edward R.
• Application Number:
  US08/541,952
• Time in Patent Office: 637 Days
• Field of Search: 210/85, 210/638, 210/651, 210/665, 210/669, 210/688, 210/722, 364/496, 364/502, 364/509, 364/550, 340/870.05, 340/870.06
• US Class Current: 702/23
• CPC Class Codes: C02F 1/008 Control or steering systems not provided for elsewhere in subclass C02F
• CPC Class Codes: G01N 33/18 Water

Abstract

A method and the apparatus (hereinafter referred to as the environmental monitoring system or EMS") designed to sample, detect, measure, and report, in real time, the presence of contaminants and thereby provide users with the ability to continually monitor conformance of water with established health and safety standards. When integrated with a user operated process control system, the EMS enables users to control the monitored process and to thereby ensure that the sampled water complies with established health and safety standards.

Claims

1. Apparatus for detecting and measuring water contaminants and quality parameters comprising:

a user site and at least one remote monitor site;

said remote monitor site comprising a hydraulic module and an electronic module;

said electronic module comprising a microcontroller responding to data input from said hydraulic module and selectively controlling said hydraulic module, means for correlating historically recorded sensor data with present data input from said hydraulic module and providing said microcontroller with information to produce control signals selectively altering the operation of said hydraulic module, and a communication system for communicating measured data between said user site and said remote site;

said hydraulic module comprising water sample input and output means, means for selectively oxidizing or reducing said sample, and means for measuring selected parameters of said water sample; and

wherein said remote monitor site detects and measures contaminants and water quality parameters in said water sample.

2. The apparatus of claim 1 wherein said system for communicating telemetrically comprises real time communication means.

3. The apparatus of claim 1 wherein at least one contaminant species type in said sample is detected and monitored.

4. The apparatus of claim 1 wherein at least one contaminant species concentration in said sample is detected and monitored.

5. The apparatus of claim 1 wherein said microcontroller comprises at least one signal output means for performing at least one function selected from the group consisting of opening a valve, closing a valve, pumping a solution and applying a voltage.

6. The apparatus of claim 1 further comprising an expert system for assisting in the identification of the species of contaminant in the water sample.

7. The apparatus of claim 1 further comprising a user interface for communicating information regarding said remote monitor site to an operator.

8. The apparatus of claim 1 wherein said means for measuring selected water sample parameters comprises sample measurement sensors selected from the group consisting of pH sensors, temperature sensors, metal sensors, organic sensors, radiation sensors and bio sensors.

9. The apparatus of claim 1 wherein said apparatus for measuring sample parameters comprises means for measuring at least one organic compound in the sample.

10. The apparatus of claim 1 wherein said apparatus for measuring sample parameters comprises means for measuring both metals and organic compounds.

11. The apparatus of claim 1 wherein said means for selectively oxidizing or reducing said sample comprises means for breaking bonds in the sample.

12. The apparatus of claim 11 wherein said means for selectively oxidizing or reducing said sample comprises an anode/cathode system.

13. The apparatus of claim 1 wherein said at least one remote monitor site means further comprises a plating system for determining the presence of metal contaminants in said water sample.

14. The apparatus of claim 13 wherein said plating system comprises a stripping electrochemical system.

15. The apparatus of claim 1 wherein said apparatus for measuring sample parameters comprises means for measuring at least one metal in the sample.

16. The apparatus of claim 15 wherein said means for measuring metals comprises measuring metal levels in parts per billion.

17. The apparatus of claim 1 wherein said apparatus for measuring parameters in the sample comprises:

means for applying a specific voltage to sensors contiguous with the sample in a measurement cell; and

means for measuring oxidation of the sample during application of said voltage.

18. The apparatus of claim 17 wherein said means for measuring oxidation comprises means for measuring a current that is related to a sample concentration.

19. The apparatus of claim 1 wherein said user site comprises:

means for remotely controlling detection and measurement of water samples at said at least one remote monitor site;

means for processing water sample data received from said at least one remote monitor site; and

means for providing a signal to the user upon detection of selected input data parameters from the water sample.

20. The apparatus of claim 19 wherein said means for controlling detection and measurement of a water sample comprises means for selectively activating measurement sensors according to user predetermined sampling periods.

21. The apparatus of claim 19 wherein said means for processing data comprises:

means for receiving data from said at least one remote monitor site means;

means for comparing said data with data from known samples; and

means for determining whether tolerances for said input data parameters are out of user predetermined tolerance levels.

22. The apparatus of claim 21 wherein said means for determining whether tolerances for said parameters are out of user predetermined tolerance levels comprises means for classifying tolerance levels.

23. A method for detecting and measuring contaminants and quality parameters in a water sample from a remote monitor site comprising:

a) establishing a user site and at least one remote monitor site;

b) taking a water sample at said remote monitor site;

c) detecting and measuring contaminants and quality parameters in a water sample at said remote monitor site;

d) communicating the detected and measured parameters of contaminants in and quality of the water sample from the remote monitor site to the user site; and

e) changing the method of detecting and measuring water contaminants and quality parameters at the remote monitor site from the user site in response to communicated data from the remote monitor site.

24. The method of claim 23 further comprising the step of utilizing the neural network means.

25. The method of claim 23 comprising the step of varying a classification process of sample measurements.

26. The method of claim 23 further comprising the step of utilizing stripping electrochemistry at the at least one remote site.

27. The method of claim 23 further comprising the step of utilizing an expert system for assisting in the identification of the species of contaminant in the water sample.

28. The method of claim 23 further comprising the step of providing a user interface for communicating information regarding said remote monitor site to an operator.

29. The method of claim 23 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of sensing at least one species selected from the group consisting of pH, temperature, metal, organic compounds, radiation, and biological species.

30. The method of claim 23 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of detecting and measuring at least one organic compound in the sample.

31. The method of claim 23 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of detecting and measuring both metals and organic compounds.

32. The method of claim 23 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of retrieving raw data from sample sensors.

33. The method of claim 23 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of digitizing data from sample sensors and transmitting the digitized data.

34. The method of claim 23 further comprising the steps of:

measuring parameters in the sample;

retrieving data from the measured parameters; and

transmitting the data to the user site.

35. The method of claim 23 wherein the step of detecting and measuring includes the step of detecting and monitoring at least one species in the sample.

36. The method of claim 35 comprising the step of detecting and monitoring the concentration of said at least one species in the sample.

37. The method of claim 23 further comprising the step of correlating historically recorded sensor data with present date to change the operating parameters during field operations.

38. The method of claim 37 further comprising the step of performing an iterative comparison of historical measurements and measurements of contaminants and quality parameters.

39. The method of claim 23 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of detecting and measuring at least one metal in the sample.

40. The method of claim 39 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of measuring metal levels in parts per billion.

41. The method of claim 23 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the steps of:

applying a specific voltage to sensors contiguous with the sample in a measurement cell;

providing a plating solution to the sample in said measurement cell and applying said voltage to cause metallic contaminants in the sample to be plated onto a working electrode; and

applying a second voltage, after cessation of the application of said specific voltage; and

measuring oxidation of the metal contaminant in the sample.

42. The method of claim 41 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of creating a current that is related to a sample concentration.

43. The method of claim 23 further comprising the step of plating sample constituents onto an electrode at the at least one remote site.

44. The method of claim 43 further comprising the step of plating a metal from the sample onto the electrode and measuring oxidation of the metal plated on the electrode for determining a concentration of the metal.

45. The method of claim 43 further comprising the step adding acid to the sample to make the sample electrolytic.

46. The method of claim 23 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the steps of:

controlling a parameter of the at least one remote monitor site;

processing data from the at least one remote monitor site; and

providing a signal upon detection of selected parameters in the sample.

47. The method of claim 46 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of activating measurement sensors according to predetermined sampling periods.

48. The method of claim 46 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the steps of:

receiving data from the at least one remote monitor site;

comparing the data with data from known samples; and

determining whether tolerances for the parameters are out of tolerance levels.

49. The method of claim 48 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of comparing data from the at least one remote monitor site with reference samples.

50. The method of claim 48 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of comparing data from the at least one remote monitor site with predetermined values.

51. The method of claim 48 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of classifying tolerance levels.

52. The method of claim 23 further comprising the step of pretreating the sample prior to the step of detecting and measuring.

53. The method of claim 52 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of oxidizing the sample.

54. The method of claim 52 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of breaking bonds in the sample.

55. The method of claim 52 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of combining the pretreated sample with a known standard solution.

56. The method of claim 52 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of reducing the sample.

57. The method of claim 56 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of reducing positively charged ions.

58. The method of claim 52 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of both oxidizing and reducing the sample.

59. The method of claim 58 wherein the step of pretreating the sample prior to the step of detecting and measuring further comprises the step of breaking complex metallic organic bonds in the sample.