Karmakar Debabrata, Tasnim Nishat, Hasan Md Rakibul, Hossain Md Saddam, Arefin Paroma, Bhowmik Dip, Nibir Yead Morshed, Kabir Kazi Bayezid, Karim Rezaul
Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh.
Department of Chemical Engineering, Bangladesh University of Engineering and Technology, Dhaka, Bangladesh.
Heliyon. 2024 Sep 26;10(19):e38441. doi: 10.1016/j.heliyon.2024.e38441. eCollection 2024 Oct 15.
Microalgae, a versatile source of biofuels, chemicals, and nutraceuticals, necessitates efficient drying for subsequent applications. Extensive studies have been done on the benefits and uses of microalgae, but very few are focusing on drying. This research focused on a specific microalga, , to analyze the drying kinetics involved in the moisture removal process. Data on drying behavior were collected using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). As the temperature rose, the moisture content of the biomass rapidly decreased and peaked between 65 and 80 °C. From four widely used drying kinetics models, which are typically used to analyze the drying kinetics of agricultural goods, four non-isothermal drying models were derived. These models were assessed using the coefficient of determination (R) and reduced chi-square (χ). Page's model emerged as the best fit for describing drying kinetics. This study introduces a novel approach to characterize the intrinsic properties of freshly harvested by employing TGA and DSC. Unlike other studies focusing on conventional drying methods, our investigation provides real-time insights into the microalgae's thermal behavior during drying.
微藻是生物燃料、化学品和营养保健品的多种来源，为后续应用需要进行高效干燥。关于微藻的益处和用途已经进行了广泛研究，但很少有研究关注干燥。本研究聚焦于一种特定的微藻，以分析水分去除过程中涉及的干燥动力学。使用热重分析（TGA）和差示扫描量热法（DSC）收集干燥行为数据。随着温度升高，生物质的水分含量迅速下降，并在65至80°C之间达到峰值。从通常用于分析农产品干燥动力学的四个广泛使用的干燥动力学模型中，推导出四个非等温干燥模型。使用决定系数（R）和约化卡方（χ）对这些模型进行评估。佩奇模型成为描述干燥动力学的最佳拟合模型。本研究引入了一种通过采用TGA和DSC来表征新鲜收获微藻内在特性的新方法。与其他关注传统干燥方法的研究不同，我们的研究提供了微藻干燥过程中热行为的实时见解。
