The Quick Scan BOD Analyzer is a laboratory respirometer, designed to quickly evaluate oxygen uptake in wastewater samples, and can be used to estimate BOD5, or to do rapid assessment of treatability on trucked-in or industrial waste. A short-run respirometric test on a wastewater sample can give a qualitative evaluation of the sample. However, when building a respirometric correlation to BOD5, protocols for a wastewater are developed, that will historically demonstrate reliable data that can be extrapolated to give accurate BOD5 predictions. Two elements of the protocol that are most important are F/M and use of seed that is at an endogenous uptake rate. In a typical short term respirometry test used for BOD5 rediction, an endogenous control is run against a wastewater sample. The endogenous control is dosed with distilled water at the same volume as the wastewater added to the test sample, then the endogenous respiration from the control is subtracted from the wastewater sample to evaluate oxygen uptake rate and volume. With a little experimenting to establish the optimum F/M to achieve significant reduction in a short-term test, reliable predictions can be made.
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