Process for the detection of biodegradable and toxic substances

Details Process for the detection of biodegradable and toxic substances Process for the detection of biodegradable and toxic substances

1985-01-23

1988-05-31

Richman, Barry S.

Chemistry: analytical and immunological testing

Automated chemical analysis

Condition or time responsive

435 3, 435 29, 435 32, 436 52, 436 55, 436 62, 436138, 436179, C12Q 102, C12Q 118, C12Q 300

Patent

active

047481277

ABSTRACT:
A process and apparatus for measuring the degree of pollution, the degradableness, and the level of toxicity of aqueous liquids such as effluent. A partial stream is withdrawn from the liquid undergoing examination and diluted with biologically neutral water. The diluted partial stream is oxygenated and continuously flows through a biological bath in a reaction vessel having a constant living mass. The dilution of the partial stream is regulated in such a manner through measurement of the oxygen content upstream and downstream of the reaction vessel, that with constant volume flow through the reaction vessel, the difference between the measurement values obtained remains essentially constant at a predetermined value, so that the amount of dilution serves for the indication of the level of pollution. Additional reaction vessels connected in parallel or in series with the first reaction vessel and having associated oxygen electrodes allows measurement of the toxicity and degradableness of the pollution.

REFERENCES:
patent: 3348409 (1967-10-01), Arthur
patent: 3684702 (1972-08-01), Hartmann
patent: 3731522 (1973-05-01), Mikesell
patent: 3740320 (1973-06-01), Arthur
patent: 3766010 (1973-10-01), Ikeda et al.
patent: 3775060 (1973-11-01), Courtois et al.
patent: 4073692 (1978-02-01), Ciaccio et al.
patent: 4162195 (1979-07-01), Solyom et al.
patent: 4314969 (1982-02-01), Arthur et al.
patent: 4330385 (1982-05-01), Arthur et al.

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