Chemistry: analytical and immunological testing – Sulfur containing – Organic or sulfhydryl containing
Patent
1998-10-13
1999-11-09
Soderquist, Arlen
Chemistry: analytical and immunological testing
Sulfur containing
Organic or sulfhydryl containing
422 62, 422 81, 422 82, 436 50, 436 52, 436 53, 436119, 436177, 436181, 436182, 436183, G01N 3300, G01N 2100
Patent
active
059812893
ABSTRACT:
A hydrogen sulfide analyzer that continuously samples waste water from a waste stream or reservoir and measures the concentration of purgeable H.sub.2 S present (H.sub.2 SP) This information, when combined with the volume of water present, provides a control quality signal that regulates the feed rate of the destructor chemical into the waste stream. This results in chemical savings for the user. A second result is the reduction in odor complaints and the corrosion problems associated with H.sub.2 S emissions. The analyzer measures only the purgeable H.sub.2 S contained in the liquid sample. The analyzer violently agitates the sample containing dissolved H.sub.2 S in solution to simulate actual conditions at points of agitation in the waste water stream. It also provides nearly optimal partial pressure conditions for the H.sub.2 S to exit the solution as a free gas. Any H.sub.2 S that does not come out of solution in the analyzer is not of interest to the user since it will most likely not come out of solution in the treatment process either. The analyzer controls the feed of the destructor chemical based upon the measured quantity and concentration of H.sub.2 S that is likely to come out of solution in the collection/treatment process. It does not measure the total amount of sulfides present as other analyzers do. This is an important feature since it is wasteful to treat a condition that is not going to be a problem.
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Forman Randy J.
Horenstein Bennett K.
McDonald Clifford L.
Nickolaus Lowell R.
Shannon David J.
Isco, Inc.
Soderquist Arlen
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