Abstract
The RODTOX (Rapid Oxygen Demand and TOXicity tester) biosensor is a device for on-line monitoring of the short-term Biochemical Oxygen Demand (stBOD) and potential toxicity of incoming wastewater on the basis of on-line interpretation of respirograms resulting from pulse additions of either calibration substrate or sample. The principle of toxicity detection is based on the comparison of calibration respirograms before and after receiving a potential toxicant. In this paper, the results of the RODTOX as an on-line toxicity monitor will be presented. Moreover, a simple and fast procedure to estimate the IC50 of a toxicant was developed. Its validity and good repeatability has been shown. The performance of this procedure was also compared with the Microtox test.
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