Biological testing device

Details Biological testing device Biological testing device

G - Physics

01

N

150/15

G01N 33/18 (2006.01) C02F 3/08 (2006.01) C12Q 1/00 (2006.01)

Patent

CA 1038271

ABSTRACT OF THE DISCLOSURE A continuous or discontinuous process for determining acute toxicity in an aqueous liquid, especially in waste water, com- prises preaerating to almost oxygen saturation at least a part of the liquid, then contacting the preaerated liquid with a submerse, biological bed, and measuring the oxygen content of the effluent from said bed, the biomass of the bed being main- tained substantially at a constant level. Apparatus for carry- ing out this process comprises a preaerator for producing almost complete saturation of said liquid with oxygen, a submerse biolo- gical bed and an oxygen electrode for measuring the oxygen con- tent of the effluent from said bed, the biomass of the bed in said apparatus being cultured in at least one set of two opposed mutually movable surfaces and channels being defined between the surfaces to produce contact between said liquid and the biomass.

223080

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