Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/10532
Title: Monitoring the toxicity of phenolic chemicals to activated sludge using a novel optical scanning respirometer
Authors: Chan, CM
Lo, W 
Wong, KY 
Chung, WF
Issue Date: 1999
Publisher: Pergamon Press
Source: Chemosphere, 1999, v. 39, no. 9, p. 1421-1432 How to cite?
Journal: Chemosphere 
Abstract: This paper reports the development of optical scanning respirometer for determining the toxicity of chemicals to activated sludge. The respirometer is used to measure the dissolved oxygen concentration by monitoring the luminescence intensity of ruthenium dye immobilized in a polymer film in contact with the wastewater sample. The intensity is related to the extent of oxygen quenching of luminescence. The toxicity of chemicals can be evaluated by measuring the inhibition on respiration rate of microorganism using the scanning respirometer. The IC50 values (concentration of a chemical that exhibits 50% respiration inhibition) of various phenolic chemicals in activated sludge were determined. The performance of this method is compared with other toxicity methods. The experimental results indicate that the reproducibility and sensitivity of this respirometer are reasonably good.
URI: http://hdl.handle.net/10397/10532
ISSN: 0045-6535
EISSN: 1879-1298
DOI: 10.1016/S0045-6535(99)00044-2
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