Fully Automated System of Continual Testing of Aerobic Biodegradability in Aqueous or Soil Environment

Page: 139

P. Dřímal and J. Hoffmann

Department of Environmental Protection Engineering, Faculty of Technology, Tomas Bata University, Zlín

 

The aim of this work was to introduce a unique device – fully automated respirometer Micro-Oxymax (Columbus Instruments Corp., Ohio, USA) which can be used for testing aerobic biodegradability of plastics in aerobic aqueous or soil environment. The O2 consumption and CO2 production in gas phase of the test chambers are measured periodically in 30 parallel tests in our respirometer arrangement. The selected experimental conditions of the biodegradability tests were based on the prior research focused on reproducibility and repeatability of the measurements. The results of this study indicate that the respirometer application in aerobic biodegradability is very effective. It provides comparable results with other methods (acidimetric or GC determination of CO2 production), is incomparably less laborious and shows a high testing capacity (up to 80 measuring chambers at a time).

 

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