Optics: measuring and testing – For optical fiber or waveguide inspection
Patent
1976-06-22
1978-07-11
Corbin, John K.
Optics: measuring and testing
For optical fiber or waveguide inspection
210143, 356197, 356208, G01N 2124, B01D 2102
Patent
active
040998711
ABSTRACT:
Automatic determination of the activated sludge volume index by use of a single sample is accomplished by a method which comprises placing in a test cell a mixed liquor of activated sludge sampled at the aerator outlet or at the final settler, automatically determining the concentration of activated sludge and the sedimentation rate of activated sludge by optical means and calculating the activated sludge volume index by subjecting the found values of activated sludge concentration and activated sludge sedimentation rate to an arithmetic circuit.
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patent: 3518437 (1970-06-01), Riggs
patent: 3715761 (1973-02-01), Drekter et al.
patent: 3972614 (1976-08-01), Johansen et al.
Briggs, R., "Continuous Recording of Suspended Solids in Effluents", J. Sci. Instrum., vol. 39, 1962, pp. 2-7.
Swanwick, K. H., "Instrumental Measurement of Suspended Solids for Activated-Sludge Plant Control", Paper #29 of Progress in Water Technology, vol. 6, Instrumentation Control and Automation for Waste-Water Treatment Systems, Edited by Andrews et al., Pergamon Press, 1974, pp. 221-230.
Ishihara Yutaka
Morimoto Yuko
Sunahara Hiroshi
Tanaka Kazuhiko
Agency of Industrial Science and Technology
Corbin John K.
Punter Wm. H.
Yanagimoto Manufacturing Co., Ltd.
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