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The electrolytic respirometer part 1 factors affecting oxygen uptake measurements

, : The electrolytic respirometer part 1 factors affecting oxygen uptake measurements. Water Research 10(11): 1031-1040

The electrolytic respirometer provides a more accurate and more complete measurement of biochemical O2 demand (BOD) of wastewater samples than normally is obtained by the standard dilution BOD method. Laboratory and field studies show that the electrolytic respirometer is a dependable instrument for making BOD measurements, is simple to operate, and provides a continuous readout of the O2 uptake reaction (by microorganisms). The major factors affecting O2 uptake measurements with the electrolytic respirometer are the mixing rate and the concentration of O2 demanding material in the sample. These system limitations can be overcome by using simple procedures such as increased mixing rate or enrichment of the O2 in the air in contact with the sample. The precision of BOD measurement with the electrolytic respirometer was considerably greater than with the dilution method.

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