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Energies 2018, 11(9), 2327;

Optimisation of Tray Drier Microalgae Dewatering Techniques Using Response Surface Methodology

Institute of Engineering and Energy Technologies, School of Computing, Engineering and, Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, UK
School of Engineering and Applied Science, Aston University, Aston Triangle, Birmingham B4 7ET, UK
Author to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 20 August 2018 / Accepted: 29 August 2018 / Published: 4 September 2018
(This article belongs to the Special Issue 10 Years Energies - Horizon 2028)
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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. View Full-Text
Keywords: microalgae; biomass; tray drier; dewatering; renewable energy; design expert microalgae; biomass; tray drier; dewatering; renewable energy; design expert

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Anyanwu, R.C.; Rodriguez, C.; Durrant, A.; Olabi, A.G. Optimisation of Tray Drier Microalgae Dewatering Techniques Using Response Surface Methodology. Energies 2018, 11, 2327.

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