Liquid purification or separation – Processes – Chromatography
Patent
1983-08-31
1985-11-19
Adee, John
Liquid purification or separation
Processes
Chromatography
210746, 210 961, 2101982, 210908, 436 56, 436161, C02C 100
Patent
active
045540772
ABSTRACT:
A method of tracing sewage effluent is described in which samples of fluid flows are subjected to high performance liquid chromatography with respective elution systems capable of eluting different selected compounds therefrom, and the concentration of each compound in the sample is determined spectroscopically. The method is used to determine sewage flow paths in natural water bodies, such as rivers, to check for contamination by sewage, to determine possible sewage sources, the detection of uric acid, for example, being indicative of a human source; and to monitor the effluent from sewage treatment plants.
A monitoring system for sewage treatment works is also described in which bromophenol blue is added to the sewage influent to the biodegradation stage as a dilution indicator and the changes in the bromophenol blue concentration and in the concentration of a biodegradable sewage component, such as uric acid, are monitored throughout the stage to give an indication of the progress of the biodegradation reaction; this information is used in controlling the operation of the plant to maximize its efficiency.
REFERENCES:
patent: 2046365 (1936-07-01), Cassidy et al.
patent: 3180142 (1965-04-01), Bombardieri
patent: 3372746 (1968-03-01), Sanderson et al.
patent: 4235716 (1980-11-01), Halpaap et al.
patent: 4252537 (1981-02-01), Cattran et al.
patent: 4333838 (1982-06-01), Ballnus
Large Bore Coated Columns in Analysis for Trace Organic Pollutants in Water by Hussein et al. in Journal of Chromatography 243 (1982) 43-50.
Liquid Chromatography Catalog of Rainin Instrument Co., Inc. p. 108, published 1982.
Identification and Estimation of Neutral Organic Contaminants in Potable Water by Burnham et al. in Analytical Chemistry, vol. 44, No. 1, Jan. 1972, pp. 139-142.
Langes Handbook of Chemistry, 10th ed., 1961 pp. 955-960.
Braven James
Brown Leslie
Rhead Michael M.
Adee John
Devon County Council
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