Convective Drying of Sewage Sludge Layer in Through-flow

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Izvoz citacije: ABNT
LIPOLT, Andraž ;ŠIROK, Brane ;HOČEVAR, Marko ;NOVAK, Lovrenc .
Convective Drying of Sewage Sludge Layer in Through-flow. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 66, n.9, p. 481-493, september 2020. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/sl/article/convective-drying-of-sewage-sludge-layer-in-through-flow/>. Date accessed: 02 dec. 2020. 
doi:http://dx.doi.org/10.5545/sv-jme.2020.6717.
Lipolt, A., Širok, B., Hočevar, M., & Novak, L.
(2020).
Convective Drying of Sewage Sludge Layer in Through-flow.
Strojniški vestnik - Journal of Mechanical Engineering, 66(9), 481-493.
doi:http://dx.doi.org/10.5545/sv-jme.2020.6717
@article{sv-jmesv-jme.2020.6717,
	author = {Andraž  Lipolt and Brane  Širok and Marko  Hočevar and Lovrenc  Novak},
	title = {Convective Drying of Sewage Sludge Layer in Through-flow},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {66},
	number = {9},
	year = {2020},
	keywords = {wastewater sludge, thin-layer drying, porous layer, drying kinetics, drag force},
	abstract = {Drying of the sewage sludge layer was investigated in a convective laboratory dryer at air temperatures of 65 °C and 80 °C and air speeds of 0.53 m/s and 0.83 m/s. The sludge layer was formed by loading cylindrical extrudates on a grate of 0.5 m × 0.5 m size. The drying air was directed through the layer, as typically encountered in industrial belt dryers. Under such setup, the sludge layer structure and porosity significantly affect the air flow conditions and thus the drying rates. Shrinkage and cracking of the material during drying caused changes in the layer’s porous structure, that affected the pressure drop and the drag force due to passing of air through the layer. The decreasing of drag force over time was modeled by a simple function that showed excellent agreement to the selected measured data. The sludge layer drying kinetics was determined by fitting the measured data to the most common drying models. Two models, the modified Nadhari and the Wang Singh model, were determined as most suitable for modeling of drying curves. The total drying time per kilogram of sludge was modeled as a function of drying air temperature, drying air velocity and initial sludge dry matter content. The coefficient of determination (R2) of the modelis 0.944. Total drying times between 43 minutes per kilogram and 76 minutes per kilogram of sludge were obtained for the investigated range of drying air conditions.},
	issn = {0039-2480},	pages = {481-493},	doi = {10.5545/sv-jme.2020.6717},
	url = {https://www.sv-jme.eu/sl/article/convective-drying-of-sewage-sludge-layer-in-through-flow/}
}
Lipolt, A.,Širok, B.,Hočevar, M.,Novak, L.
2020 September 66. Convective Drying of Sewage Sludge Layer in Through-flow. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 66:9
%A Lipolt, Andraž 
%A Širok, Brane 
%A Hočevar, Marko 
%A Novak, Lovrenc 
%D 2020
%T Convective Drying of Sewage Sludge Layer in Through-flow
%B 2020
%9 wastewater sludge, thin-layer drying, porous layer, drying kinetics, drag force
%! Convective Drying of Sewage Sludge Layer in Through-flow
%K wastewater sludge, thin-layer drying, porous layer, drying kinetics, drag force
%X Drying of the sewage sludge layer was investigated in a convective laboratory dryer at air temperatures of 65 °C and 80 °C and air speeds of 0.53 m/s and 0.83 m/s. The sludge layer was formed by loading cylindrical extrudates on a grate of 0.5 m × 0.5 m size. The drying air was directed through the layer, as typically encountered in industrial belt dryers. Under such setup, the sludge layer structure and porosity significantly affect the air flow conditions and thus the drying rates. Shrinkage and cracking of the material during drying caused changes in the layer’s porous structure, that affected the pressure drop and the drag force due to passing of air through the layer. The decreasing of drag force over time was modeled by a simple function that showed excellent agreement to the selected measured data. The sludge layer drying kinetics was determined by fitting the measured data to the most common drying models. Two models, the modified Nadhari and the Wang Singh model, were determined as most suitable for modeling of drying curves. The total drying time per kilogram of sludge was modeled as a function of drying air temperature, drying air velocity and initial sludge dry matter content. The coefficient of determination (R2) of the modelis 0.944. Total drying times between 43 minutes per kilogram and 76 minutes per kilogram of sludge were obtained for the investigated range of drying air conditions.
%U https://www.sv-jme.eu/sl/article/convective-drying-of-sewage-sludge-layer-in-through-flow/
%0 Journal Article
%R 10.5545/sv-jme.2020.6717
%& 481
%P 13
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 66
%N 9
%@ 0039-2480
%8 2020-09-02
%7 2020-09-02
Lipolt, Andraž, Brane  Širok, Marko  Hočevar, & Lovrenc  Novak.
"Convective Drying of Sewage Sludge Layer in Through-flow." Strojniški vestnik - Journal of Mechanical Engineering [Online], 66.9 (2020): 481-493. Web.  02 Dec. 2020
TY  - JOUR
AU  - Lipolt, Andraž 
AU  - Širok, Brane 
AU  - Hočevar, Marko 
AU  - Novak, Lovrenc 
PY  - 2020
TI  - Convective Drying of Sewage Sludge Layer in Through-flow
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2020.6717
KW  - wastewater sludge, thin-layer drying, porous layer, drying kinetics, drag force
N2  - Drying of the sewage sludge layer was investigated in a convective laboratory dryer at air temperatures of 65 °C and 80 °C and air speeds of 0.53 m/s and 0.83 m/s. The sludge layer was formed by loading cylindrical extrudates on a grate of 0.5 m × 0.5 m size. The drying air was directed through the layer, as typically encountered in industrial belt dryers. Under such setup, the sludge layer structure and porosity significantly affect the air flow conditions and thus the drying rates. Shrinkage and cracking of the material during drying caused changes in the layer’s porous structure, that affected the pressure drop and the drag force due to passing of air through the layer. The decreasing of drag force over time was modeled by a simple function that showed excellent agreement to the selected measured data. The sludge layer drying kinetics was determined by fitting the measured data to the most common drying models. Two models, the modified Nadhari and the Wang Singh model, were determined as most suitable for modeling of drying curves. The total drying time per kilogram of sludge was modeled as a function of drying air temperature, drying air velocity and initial sludge dry matter content. The coefficient of determination (R2) of the modelis 0.944. Total drying times between 43 minutes per kilogram and 76 minutes per kilogram of sludge were obtained for the investigated range of drying air conditions.
UR  - https://www.sv-jme.eu/sl/article/convective-drying-of-sewage-sludge-layer-in-through-flow/
@article{{sv-jme}{sv-jme.2020.6717},
	author = {Lipolt, A., Širok, B., Hočevar, M., Novak, L.},
	title = {Convective Drying of Sewage Sludge Layer in Through-flow},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {66},
	number = {9},
	year = {2020},
	doi = {10.5545/sv-jme.2020.6717},
	url = {https://www.sv-jme.eu/sl/article/convective-drying-of-sewage-sludge-layer-in-through-flow/}
}
TY  - JOUR
AU  - Lipolt, Andraž 
AU  - Širok, Brane 
AU  - Hočevar, Marko 
AU  - Novak, Lovrenc 
PY  - 2020/09/02
TI  - Convective Drying of Sewage Sludge Layer in Through-flow
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 66, No 9 (2020): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 10.5545/sv-jme.2020.6717
KW  - wastewater sludge, thin-layer drying, porous layer, drying kinetics, drag force
N2  - Drying of the sewage sludge layer was investigated in a convective laboratory dryer at air temperatures of 65 °C and 80 °C and air speeds of 0.53 m/s and 0.83 m/s. The sludge layer was formed by loading cylindrical extrudates on a grate of 0.5 m × 0.5 m size. The drying air was directed through the layer, as typically encountered in industrial belt dryers. Under such setup, the sludge layer structure and porosity significantly affect the air flow conditions and thus the drying rates. Shrinkage and cracking of the material during drying caused changes in the layer’s porous structure, that affected the pressure drop and the drag force due to passing of air through the layer. The decreasing of drag force over time was modeled by a simple function that showed excellent agreement to the selected measured data. The sludge layer drying kinetics was determined by fitting the measured data to the most common drying models. Two models, the modified Nadhari and the Wang Singh model, were determined as most suitable for modeling of drying curves. The total drying time per kilogram of sludge was modeled as a function of drying air temperature, drying air velocity and initial sludge dry matter content. The coefficient of determination (R2) of the modelis 0.944. Total drying times between 43 minutes per kilogram and 76 minutes per kilogram of sludge were obtained for the investigated range of drying air conditions.
UR  - https://www.sv-jme.eu/sl/article/convective-drying-of-sewage-sludge-layer-in-through-flow/
Lipolt, Andraž, Širok, Brane, Hočevar, Marko, AND Novak, Lovrenc.
"Convective Drying of Sewage Sludge Layer in Through-flow" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 66 Number 9 (02 September 2020)

Avtorji

Inštitucije

  • Petrol d.d., Slovenia 1
  • University of Ljubljana, Faculty of Mechanical Engineering, Slovenia 2

Informacije o papirju

Strojniški vestnik - Journal of Mechanical Engineering 66(2020)9, 481-493

https://doi.org/10.5545/sv-jme.2020.6717

Drying of the sewage sludge layer was investigated in a convective laboratory dryer at air temperatures of 65 °C and 80 °C and air speeds of 0.53 m/s and 0.83 m/s. The sludge layer was formed by loading cylindrical extrudates on a grate of 0.5 m × 0.5 m size. The drying air was directed through the layer, as typically encountered in industrial belt dryers. Under such setup, the sludge layer structure and porosity significantly affect the air flow conditions and thus the drying rates. Shrinkage and cracking of the material during drying caused changes in the layer’s porous structure, that affected the pressure drop and the drag force due to passing of air through the layer. The decreasing of drag force over time was modeled by a simple function that showed excellent agreement to the selected measured data. The sludge layer drying kinetics was determined by fitting the measured data to the most common drying models. Two models, the modified Nadhari and the Wang Singh model, were determined as most suitable for modeling of drying curves. The total drying time per kilogram of sludge was modeled as a function of drying air temperature, drying air velocity and initial sludge dry matter content. The coefficient of determination (R2) of the modelis 0.944. Total drying times between 43 minutes per kilogram and 76 minutes per kilogram of sludge were obtained for the investigated range of drying air conditions.

wastewater sludge, thin-layer drying, porous layer, drying kinetics, drag force