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On-Line Measurement of Biochemical Oxygen Demand of livestock Wastewater by Multi-Biosensor System  

Kim, Jin-Kyeung (Department of Biochemical Engineering, College of Engineering, University of Suwon)
Kim, Tai-Jin (Department of Biochemical Engineering, College of Engineering, University of Suwon)
Publication Information
KSBB Journal / v.21, no.4, 2006 , pp. 241-247 More about this Journal
Abstract
The present study was intended to examine a basic scheme to determine the biochemical oxygen demand(BOD) of livestock wastewater by means of six individual dissolved oxygen(DO) sensors and its multi-measurable meter. Maximal point of the first order time derivative of the DO difference between DO distribution of sterilized livestock wastewater and that of non-sterilized livestock wastewater, was considered as the oxygen uptake rate(OUR) of microorganisms in livestock wastewater, as determined to be 0.00074 mg $O_2/{\ell}{\cdot}sec$. The present study showed that there was a fair linear relationship(97.72%) between maximal OUR and BOD values of livestock wastewater, the latter being determined by classical Winkler azide method. It was thus concluded that the present multi-biosensor system might be applicable to an on-line system for measurement of BOD of livestock wastewater.
Keywords
Livestock; wastewater; BOD; OUR; monitoring;
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