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Temperature impact on sludge yield, settleability and kinetics of three heterotrophic conversions corroborates the prospect of thermophilic biological nitrogen removal

Tom Vandekerckhove (UGent) , Chaïm De Mulder (UGent) , Nico Boon (UGent) and Siegfried Vlaeminck (UGent)
(2018) BIORESOURCE TECHNOLOGY. 269. p.104-112
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Abstract
In specific municipal and industrial cases, thermophilic wastewater treatment (> 45 degrees C) might bring cost advantages over commonly applied mesophilic processes (10-35 degrees C). To develop such a novel process, one needs sound parameters on kinetics, sludge yield and sludge settleability of three heterotrophic conversions: aerobic carbon removal, denitritation and denitrification. These features were evaluated in acetate-fed sequencing batch reactors (30, 40, 50 and 60 degrees C). Higher temperatures were accompanied by lower sludge production and maximum specific removal rates, resulting mainly from lower maximum growth rates. Thermophilic denitritation was demonstrated for the first time, with lower sludge production (18-26%), higher nitrogen removal rates (24-92%) and lower carbon requirement (40%) compared to denitrification. Acceptable settling of thermophilic aerobic (60 degrees C) and anoxic biomass (50 and 60 degrees C) was obtained. Overall, this parameter set may catalyze the establishment of thermophilic nitrogen removal, once nitritation and nitratation are characterized. Furthermore, waters with low COD/N ratio might benefit from thermophilic nitritation/denitritation.
Keywords
Short-cut nitrogen removal, Metabolic flexibility, Industrial wastewater treatment, Observed yield, Decay constant, BACTERIAL COMMUNITY STRUCTURE, HIGH-STRENGTH WASTEWATERS, WASTE-WATER TREATMENT, AEROBIC PROCESS, MILL EFFLUENT, DENITRIFICATION, BIOREACTORS, REACTOR, COEFFICIENT, RECOVERY

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Chicago
Vandekerckhove, Tom, Chaïm De Mulder, Nico Boon, and Siegfried Vlaeminck. 2018. “Temperature Impact on Sludge Yield, Settleability and Kinetics of Three Heterotrophic Conversions Corroborates the Prospect of Thermophilic Biological Nitrogen Removal.” Bioresource Technology 269: 104–112.
APA
Vandekerckhove, T., De Mulder, C., Boon, N., & Vlaeminck, S. (2018). Temperature impact on sludge yield, settleability and kinetics of three heterotrophic conversions corroborates the prospect of thermophilic biological nitrogen removal. BIORESOURCE TECHNOLOGY, 269, 104–112.
Vancouver
1.
Vandekerckhove T, De Mulder C, Boon N, Vlaeminck S. Temperature impact on sludge yield, settleability and kinetics of three heterotrophic conversions corroborates the prospect of thermophilic biological nitrogen removal. BIORESOURCE TECHNOLOGY. 2018;269:104–12.
MLA
Vandekerckhove, Tom, Chaïm De Mulder, Nico Boon, et al. “Temperature Impact on Sludge Yield, Settleability and Kinetics of Three Heterotrophic Conversions Corroborates the Prospect of Thermophilic Biological Nitrogen Removal.” BIORESOURCE TECHNOLOGY 269 (2018): 104–112. Print.
@article{8579081,
  abstract     = {In specific municipal and industrial cases, thermophilic wastewater treatment ({\textrangle} 45 degrees C) might bring cost advantages over commonly applied mesophilic processes (10-35 degrees C). To develop such a novel process, one needs sound parameters on kinetics, sludge yield and sludge settleability of three heterotrophic conversions: aerobic carbon removal, denitritation and denitrification. These features were evaluated in acetate-fed sequencing batch reactors (30, 40, 50 and 60 degrees C). Higher temperatures were accompanied by lower sludge production and maximum specific removal rates, resulting mainly from lower maximum growth rates. Thermophilic denitritation was demonstrated for the first time, with lower sludge production (18-26\%), higher nitrogen removal rates (24-92\%) and lower carbon requirement (40\%) compared to denitrification. Acceptable settling of thermophilic aerobic (60 degrees C) and anoxic biomass (50 and 60 degrees C) was obtained. Overall, this parameter set may catalyze the establishment of thermophilic nitrogen removal, once nitritation and nitratation are characterized. Furthermore, waters with low COD/N ratio might benefit from thermophilic nitritation/denitritation.},
  author       = {Vandekerckhove, Tom and De Mulder, Cha{\"i}m and Boon, Nico and Vlaeminck, Siegfried},
  issn         = {0960-8524},
  journal      = {BIORESOURCE TECHNOLOGY},
  language     = {eng},
  pages        = {104--112},
  title        = {Temperature impact on sludge yield, settleability and kinetics of three heterotrophic conversions corroborates the prospect of thermophilic biological nitrogen removal},
  url          = {http://dx.doi.org/10.1016/j.biortech.2018.08.012},
  volume       = {269},
  year         = {2018},
}

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