MScE Oral Examination-FR

Event Details:

Ms. Sarah Preston will present her University Oral Examination for the MScE Degree on Monday, June 25, at 10 a.m. in the ADI Studio. 

"Comparison of Three Systems for Removing Carbon Dioxide in Recirculating Salmon Smolt Hatcheries".

Abstract

The objective of this study was to determine the most cost-effective method(s) for maintaining CO2 concentrations at 15mg/L in recirculating salmon smolt hatcheries. Models were developed for predicting CO2 removal for the three degassing methods studied: degassing tower, moving-bed biofilter and sidetank degassers.  Total system balance models were also developed to predict steady state NH4+, CO2 and HCO3- concentrations around the recirculation loop.

The moving-bed biofilter and degassing tower were found to have a single pass removal efficiency of 35%.  The sidetank degassers had a lower removal efficiency of 20% but removed the most CO2 per energy input (77mgCO2/kJ).   The CO2 mass transfer coefficient was found to be 0.15min-1 for the moving-bed biofilter, 0.6min-1 for the degassing tower and 1.4min-1 for the sidetank degasser.  Good agreement was seen between the model predictions and experimental data.  The most cost-effective system for CO2 removal is a moving-bed biofilter with an aerated cell.

Building: Head Hall

Room Number: ADI Studio, C25