Instrument for determination of energy oxygen and BOD5

Abstract

The objective of this investigation was to develop an instrument which would measure biological oxygen demand by some parameter which was meaningfully related to the oxygen depleting activity of waste waters, precise, and of short measurement duration (1 hour or less). The variable chosen was energy oxygen, a thermodynamic value related to the substrate free energy of oxidation in cell synthesis. The ABODA instrument, an acronym for automated biochemical oxygen demand analyzer, consists of an analyzing system and subsidiary systems which supply a measured volume of sample, standardize the dissolved oxygen probe and recorder scale, etc. It is shown that the ABODA instrument measures EO which is correlated with BOD5, precisely (±5.4% SD), and it accomplishes an analysis in 1 hour.