TY - JOUR
T1 - Influence of particles properties on biofilm structure and energy consumption in denitrifying fluidized bed bioreactors (DFBBRs)
AU - Eldyasti, Ahmed
AU - Nakhla, George
AU - Zhu, Jesse
N1 - Funding Information:
The authors gratefully acknowledge Trojan Technologies, Canada, Natural Science and Engineering Research Council of Canada (NSERC), Ontario Center of Excellence (OCE), Canada, and City of London, ON, Canada for their endless support and interest at every stage of this research project.
PY - 2012/12
Y1 - 2012/12
N2 - The influence of particles properties on biofilm structure, reactor performance, and energy consumption for denitrifying fluidized bed bioreactors (DFBBRs) using maxi-blast plastic (MX), multi-blast plastic (MB), natural zeolite (NZ), and lava rock (LR) was investigated. The work showed that the particles with sphericity of 0.9 (MB and NZ) maintained a fluffy protruding biofilm and achieved slightly higher nutrient removal efficiencies as compared to the particles with sphericity of 0.5 (MX and LR) which exhibited a patchy biofilm at low C/N ratio. As a results, lower detachment rate and biomass yields were observed for MB and NZ of 0.12 g VSS/g COD, as compared to 0.19 g VSS/g COD for both the MX and LR. This study showed that increasing the biofilm thickness, though not significantly impacting nutrient removal efficiencies, would decrease the annualized energy costs and therefore reduce the long-term operational cost. Moreover, MB appears to be the superior media.
AB - The influence of particles properties on biofilm structure, reactor performance, and energy consumption for denitrifying fluidized bed bioreactors (DFBBRs) using maxi-blast plastic (MX), multi-blast plastic (MB), natural zeolite (NZ), and lava rock (LR) was investigated. The work showed that the particles with sphericity of 0.9 (MB and NZ) maintained a fluffy protruding biofilm and achieved slightly higher nutrient removal efficiencies as compared to the particles with sphericity of 0.5 (MX and LR) which exhibited a patchy biofilm at low C/N ratio. As a results, lower detachment rate and biomass yields were observed for MB and NZ of 0.12 g VSS/g COD, as compared to 0.19 g VSS/g COD for both the MX and LR. This study showed that increasing the biofilm thickness, though not significantly impacting nutrient removal efficiencies, would decrease the annualized energy costs and therefore reduce the long-term operational cost. Moreover, MB appears to be the superior media.
KW - Biomass yield
KW - Circulating fluidized bed bioreactor
KW - Denitrification
KW - Energy consumption
KW - Sphericity
UR - http://www.scopus.com/inward/record.url?scp=84867312828&partnerID=8YFLogxK
U2 - 10.1016/j.biortech.2012.07.113
DO - 10.1016/j.biortech.2012.07.113
M3 - Article
C2 - 23073104
AN - SCOPUS:84867312828
SN - 0960-8524
VL - 126
SP - 162
EP - 171
JO - Bioresource Technology
JF - Bioresource Technology
ER -
