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Trial Number 0

Client Number 30

Project Number 2

Trial Purpose:

To evaluate supplied ozone generation unit for ozone levels via ORP readings.

Date Run:

12/01/2014

Experiment Procedure:

The wall mounted unit was turned on and allowed to reach a charge.  The ozonated water was collected in a 1000 milliliter beaker. Approximately 250 sample was collected. Samples were collected after one gallon and after four gallons of water passed through the unit. Each solution was measured for oxidation reduction potential using a Hanna Instruments ORP meter model HI 98201. The measurement unit was placed in the solution and remained in the ozonated water throughout the analysis time period. The mV readings were recorded at various time intervals to determine the level of ORP. Time intervals were at T = 0, 5, 10, 15, 20, 25, 30, 45, 60, 75, 90, 105 and 120 minutes. Values were recorded and plotted. Temperature of the solution was recorded at the initial collection point. In addition to the ozonated water, tap water was measured with the ORP meter.

Trial Results:

All samples collected were found to have a temperature of 24 C except one that had a temperature of 29 C. The two tap water samples stayed nearly constant over the two-hour assessment time frame. The initial readings were 369 and 343. Ending levels were 365 (at 60 minutes) and 324. The samples that were collected at the one-gallon mark had lower ORP readings than those collected after four gallons. The ORP levels were 720 and 680 mV. The levels began dropping off by the five-minute mark. Final readings were 453 (60 minutes) and 423.  For the four-gallon collections, initial readings continued to rise during the first 10 minutes after generation, then reaching a plateau and then dropping off around the 45-minute mark. Most of the samples collected were significantly lower at the 60-minute mark and then bottomed out at the 120-minute mark. The levels of ORP for the four-gallon collection were higher than at the one-gallon collection, peaking around the 1000 mV. All levels ended near the 425-450 mV range.

Time (min) Tap water Tap water run 2 Ozone (1 gallon) Ozone Run 2 (1 gallon) Ozone (4 gallon) Ozone Run 2 (4 gallon) Ozone Run 3 (4 gallon) Ozone Run 4 (4 gallon)
0 369 343 720 680 755 940 973 942
5 369 340 681 658 805 973 996 980
10 368 340 653 608 838 973 996 980
15 368 341 605 568 843 982 999 953
20 367 340 568 541 840 965 982 941
25 367 340 520 524 830 969 984 955
30 366 339 490 506 811 961 981 917
45 366 338 460 474 654 898 970 766
60 365 337 453 447 520 624 891 555
75   334   434 463 504 712 479
90   331   430 449 460 556 452
105   328   426 443 445 481 439
120   326   423 440 437 453 431
Date 12/1/2014 12/2/2014 12/1/2014 12/3/2014 12/1/2014 12/2/2014 12/2/2014 12/3/2014
Temp C 24 24 24 29.1 24 24 24 24.5

Success Rating:

A cleanliness study, addressing only various analytical techniques.

Conclusion:

ORP levels for each ozonated water sample were found to decrease over a two-hour window. The longer the unit is run prior to collection resulted in an increase of the initial ORP levels but all ended at nearly the same end point. Tap water levels remained relatively constant over two hours.

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