Temperature effects on wastewater nitrate removal in laboratory-scale artificial wetlands in greenhouses

Susan L. Wood, Eileen Fabian Wheeler, Robert E. Graves, Robert D. Berghage

Research output: Contribution to journalConference articlepeer-review


Wetland effluent nitrate (NO3) concentrations fluctuate due to changes in air and wetland temperature. This work compares the effect of four temperature treatments on NO3 removal rates in planted and unplanted lab-scale wetlands. Two NO3 removal rate constant models were developed from experimental NO3 depletion data and were used to predict NO3 removal rate constants in lab-scale artificial wetlands planted with Iris pseudocorus. Nitrate removal in unplanted wetlands was negligible. Between 18 and 38 °C, k-value was a third-order polynomial function of temperature in planted systems. Based on the Arrhenius equation, k-value was a first-order exponential function of temperature between 18 and 30 °C in planted wetlands. Optimum temperature for NO3 removal in the wetlands was 30 °C. Quantification of temperature effects on lab-scale artificial wetlands can be used to enhance the design and management of greenhouse wastewater treatment wetlands.

Original languageEnglish (US)
JournalPaper - American Society of Agricultural Engineers
StatePublished - 1997
EventProceedings of the 1997 ASAE Annual International Meeting. Part 1 (of 3) - Minneapolis, MN, USA
Duration: Aug 10 1997Aug 14 1997

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences (miscellaneous)


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