Journal
WATER SA
Volume 38, Issue 1, Pages 149-151Publisher
WATER RESEARCH COMMISSION
DOI: 10.4314/wsa.v38i1.18
Keywords
kinetics; biological processes; Arrhenius equation
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In this communique, we discuss the use of the Arrhenius relationship to describe the temperature dependence of reacting biological systems, such as those treating wastewater. We also discuss the use of the modified Arrhenius function, and those instances where its applicability is limited. We show that the error when using the modified relationship is 7% at 30 degrees C, 15% at 40 degrees C and 25% at 50 degrees C. We conclude that whilst the modified relationship is acceptable at lower temperatures, in those applications where higher temperatures are reached (above 25 degrees C) the error with using the relationship may not be acceptable. We present an Arrhenius equation for use in biological systems, which is applicable for all temperature ranges.
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