Optimisation of tray drier microalgae dewatering techniques using response surface methodology

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Abstract

The feasibility of the application of a tray drier in dewatering microalgae was investigated. Response surface methodology (RSM) based on Central Composite Design (CCD) was used to evaluate and optimise the effect of air temperature and air velocity as independent variables on the dewatering efficiency as a response function. The significance of independent variables and their interactions was tested by means of analysis of variance (ANOVA) with a 95% confidence level. Results indicate that the air supply temperature was the main parameter affecting dewatering efficiency, while air velocity had a slight effect on the process. The optimum operating conditions to achieve maximum dewatering were determined: air velocities and temperatures ranged between 4 to 10 m/s and 40 to 56 °C respectively. An optimised dewatering efficiency of 92.83% was achieved at air an velocity of 4 m/s and air temperature of 48 °C. Energy used per 1 kg of dry algae was 0.34 kWh.
Original languageEnglish
Article number2327
Number of pages10
JournalEnergies
Volume11
Issue number9
DOIs
Publication statusPublished - 4 Sep 2018

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Response Surface Methodology
Dewatering
Optimization
Air
Algae
Confidence Level
Analysis of variance
Response Function
Composite
Optimise
Temperature
Analysis of variance (ANOVA)
Evaluate
Energy
Interaction
Composite materials

Keywords

  • microalgae
  • biomass
  • tray drier
  • dewatering
  • renewable energy
  • design expert

Cite this

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title = "Optimisation of tray drier microalgae dewatering techniques using response surface methodology",
abstract = "The feasibility of the application of a tray drier in dewatering microalgae was investigated. Response surface methodology (RSM) based on Central Composite Design (CCD) was used to evaluate and optimise the effect of air temperature and air velocity as independent variables on the dewatering efficiency as a response function. The significance of independent variables and their interactions was tested by means of analysis of variance (ANOVA) with a 95{\%} confidence level. Results indicate that the air supply temperature was the main parameter affecting dewatering efficiency, while air velocity had a slight effect on the process. The optimum operating conditions to achieve maximum dewatering were determined: air velocities and temperatures ranged between 4 to 10 m/s and 40 to 56 °C respectively. An optimised dewatering efficiency of 92.83{\%} was achieved at air an velocity of 4 m/s and air temperature of 48 °C. Energy used per 1 kg of dry algae was 0.34 kWh.",
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Optimisation of tray drier microalgae dewatering techniques using response surface methodology. / Anyanwu, Ruth Chinyere; Rodriguez, Cristina; Durrant, Andy; Olabi, Abdul Ghani.

In: Energies, Vol. 11, No. 9, 2327, 04.09.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Optimisation of tray drier microalgae dewatering techniques using response surface methodology

AU - Anyanwu, Ruth Chinyere

AU - Rodriguez, Cristina

AU - Durrant, Andy

AU - Olabi, Abdul Ghani

PY - 2018/9/4

Y1 - 2018/9/4

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AB - The feasibility of the application of a tray drier in dewatering microalgae was investigated. Response surface methodology (RSM) based on Central Composite Design (CCD) was used to evaluate and optimise the effect of air temperature and air velocity as independent variables on the dewatering efficiency as a response function. The significance of independent variables and their interactions was tested by means of analysis of variance (ANOVA) with a 95% confidence level. Results indicate that the air supply temperature was the main parameter affecting dewatering efficiency, while air velocity had a slight effect on the process. The optimum operating conditions to achieve maximum dewatering were determined: air velocities and temperatures ranged between 4 to 10 m/s and 40 to 56 °C respectively. An optimised dewatering efficiency of 92.83% was achieved at air an velocity of 4 m/s and air temperature of 48 °C. Energy used per 1 kg of dry algae was 0.34 kWh.

KW - microalgae

KW - biomass

KW - tray drier

KW - dewatering

KW - renewable energy

KW - design expert

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