Boots – shoes – and leggings
Patent
1986-09-15
1988-11-08
Kucia, R. R.
Boots, shoes, and leggings
210614, 210626, 364500, G06F 1546
Patent
active
047837500
ABSTRACT:
A method and apparatus for determining the oxygen uptake rate of bacteria in a body of liquid incorporates withdrawing a sample of the liquid into a chamber where a dissolved oxygen probe is located, the probe outputting a signal which is a function of the amount of dissolved oxygen in the sample. The sample is aerated, and a computer is used to sample the signal at regular intervals to produce a series of time-separated values corresponding to the sampled signals, the values representing the dissolved oxygen in the sample at the timed intervals. Repeated samples can be taken, so that the O.U.R. can be monitored on a continuing basis. The O.U.R. information can be used to control the rate of aeration in a tank, or to control the rate of recycling of activated sludge from the downstream to the upstream end of the tank.
REFERENCES:
patent: 3684702 (1972-08-01), Hartmann
patent: 3926738 (1975-12-01), Wilson
patent: 3986932 (1976-10-01), Brushwyler et al.
patent: 4329232 (1982-05-01), McKenna
patent: 4424559 (1984-01-01), Lorincz et al.
patent: 4442005 (1984-04-01), Breider
patent: 4620930 (1986-11-01), McDowell
Kucia R. R.
The Governors of the University of Alberta
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