Department of Civil and Environmental Engineering, University of Pittsburgh, 3700 O'Hara Street, Pittsburgh, PA 15261, United States.
School of Sustainable Engineering and the Built Environment, Global Institute of Sustainability, Arizona State University, ISTB4 781 E Terrace Road, Tempe, AZ 85287, United States.
Bioresour Technol. 2014 Feb;153:108-15. doi: 10.1016/j.biortech.2013.11.008. Epub 2013 Nov 14.
Harvesting and drying are often described as the most energy intensive stages of microalgal biofuel production. This study analyzes two cultivation and eleven harvest technologies for the production of microalgae biomass with and without the use of drying. These technologies were combined to form 122 different production scenarios. The results of this study present a calculation methodology and optimization of total energy demand for the production of algal biomass for biofuel production. The energetic interaction between unit processes and total process energy demand are compared for each scenario. Energy requirements are shown to be highly dependent on final mass concentration, with thermal drying being the largest energy consumer. Scenarios that omit thermal drying in favor of lipid extraction from wet biomass show the most promise for energy efficient biofuel production. Scenarios which used open ponds for cultivation, followed by settling and membrane filtration were the most energy efficient.
收获和干燥通常被描述为微藻生物燃料生产中能源消耗最密集的阶段。本研究分析了在有和没有干燥的情况下生产微藻生物质的两种培养和十一种收获技术。这些技术被组合成 122 种不同的生产方案。本研究提出了一种计算方法，并对用于生物燃料生产的藻类生物质生产的总能源需求进行了优化。比较了每个方案中单元过程之间的能量相互作用和总过程能量需求。结果表明，能源需求高度依赖于最终的质量浓度，热干燥是最大的能源消耗者。与从湿生物质中提取脂质而省去热干燥的方案相比，这些方案更有希望实现节能生物燃料生产。使用开放式池塘进行培养，然后进行沉淀和膜过滤的方案效率最高。
