Liquid purification or separation – Processes – Treatment by living organism
Patent
1979-11-09
1981-04-07
Therkorn, Ernest G.
Liquid purification or separation
Processes
Treatment by living organism
210 85, 210 961, 2101953, 210220, C02F 302
Patent
active
042604907
ABSTRACT:
Method of and apparatus for monitoring a waste influent stream to a waste treatment biological basin which contains active microorganisms for levels of materials that are toxic or otherwise injurious to the microorganisms in the basin involving the (a) measurement of the rate of oxygen uptake, R, in a first sample of mixed liquor from said basin, the first sample having a predetermined volume and a predetermined dissolved oxygen content; (b) measurement of the rate of oxygen uptake, M, in a mixture of a second sample of mixed liquor taken from said basin and a sample of liquid from said waste influent stream, the second sample of mixed liquor having substantially the same volume and dissolved oxygen content as said first sample; (c) computation of the differential, M-R; (d) provision of a toxic condition signal when said differential, M-R, is lower than a predetermined value indicating a toxic effect of the influent stream sample on the sample of mixed liquor from the basin; and/or provision of an undue oxygen depletion signal when the differential, M-R, is higher than a predetermined value indicating an amount of highly degradable material in the influent stream capable of causing undue oxygen depletion and bulking and loss of microorganisms in the final clarifier effluent; (e) diverting said influent stream to a holding zone separate from said basin when said toxic condition signal or undue oxygen depletion is indicated.
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Zeitoun, Optimizing a Petrochemical Waste Bio-Oxidation System Through Automation and Biological Inhibitor Detector, EPA Grant No. S 800 766, pp. 11-17, 95-137.
Dillon Ronald D.
Frick Charles E.
Moss Jack R.
Riemer Ronald A.
Sugar John W.
Therkorn Ernest G.
Union Carbide Corporation
Wamer Gary L.
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