规模化微藻系统的生产力、碳利用率和质量的能量含量。
Productivity, carbon utilization, and energy content of mass in scalable microalgae systems.
机构信息
Oklahoma Geological Survey, The University of Oklahoma, 100 E. Boyd Street, Norman, OK 73019, USA.
出版信息
Bioresour Technol. 2012 Jun;114:499-506. doi: 10.1016/j.biortech.2012.03.012. Epub 2012 Mar 10.
This study was designed to examine carbon utilization within scalable microalgae production systems. Neochloris oleoabundans was produced in replicated troughs containing BG11 nutrient formulation. Atmospheric CO(2) was supplemented with ∼5% CO(2) or with NaHCO(3), and the pH of troughs receiving NaHCO(3) was adjusted with HCl or H(3)PO(4). Peak biomass concentrations reached 950, 1140, or 850 mg L(-1) and biomass productivities of 109, 96, and 74 mg L(-1) day(-1) were achieved in the CO(2), NaHCO(3):HCl and NaHCO(3):H(3)PO(4) troughs, respectively. The highest productivity is expected in a scaled-up continuous batch process of the CO(2) supplemented system, which was projected to yield 8948 L lipids ha(-1)yr(-1). Carbon utilization in the CO(2), NaHCO(3):HCl and NaHCO(3):H(3)PO(4) systems was ∼0.5, 15.5, and 12.9%, while the energy content of the combustible biomass was 26.7, 13.2, and 15.4 MJ kg(-1), respectively. Techno-economic analyses of microalgal production systems should consider efficiencies and cost-benefit of various carbon sources.
本研究旨在考察规模化微藻生产系统中的碳利用情况。采用 BG11 营养配方在重复的水槽中生产 Neochloris oleoabundans。用约 5%的 CO2 或 NaHCO3 补充大气 CO2，并使用 HCl 或 H3PO4 调节接受 NaHCO3 的水槽的 pH 值。在 CO2、NaHCO3：HCl 和 NaHCO3：H3PO4 水槽中，分别达到了 950、1140 或 850mg/L 的峰值生物量浓度和 109、96 和 74mg/L/d 的生物量生产力。在补充 CO2 的规模化连续批量过程中，预计最高生产力为 8948L 油脂 ha-1yr-1。CO2、NaHCO3：HCl 和 NaHCO3：H3PO4 系统中的碳利用率分别约为 0.5%、15.5%和 12.9%，而可燃生物质的能量含量分别为 26.7、13.2 和 15.4MJ/kg。微藻生产系统的技术经济分析应考虑各种碳源的效率和成本效益。
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