Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164-6120, USA.
Trends Biotechnol. 2011 Nov;29(11):537-41. doi: 10.1016/j.tibtech.2011.06.006. Epub 2011 Jul 19.
Using captured CO(2) to grow microalgae is limited by the high cost of CO(2) capture and transportation, as well as significant CO(2) loss during algae culture. Moreover, algae grow poorly at night, but CO(2) cannot be temporarily stored until sunrise. To address these challenges, we discuss a process where CO(2) is captured as bicarbonate and used as feedstock for algae culture, and the carbonate regenerated by the culture process is used as an absorbent to capture more CO(2). This process would significantly reduce carbon capture costs because it does not require additional energy for carbonate regeneration. Furthermore, not only would transport of the aqueous bicarbonate solution cost less than for that of compressed CO(2), but using bicarbonate would also provide a superior alternative for CO(2) delivery to an algae culture system.
利用捕获的 CO2 来培养微藻受到 CO2 捕获和运输成本高以及藻类培养过程中 CO2 大量损失的限制。此外，藻类在夜间生长不良，但 CO2 不能暂时储存到日出。为了解决这些挑战，我们讨论了一种将 CO2 捕获为碳酸氢盐并用作藻类培养原料的过程，以及由培养过程再生的碳酸盐被用作吸收剂来捕获更多的 CO2。该过程将大大降低碳捕获成本，因为它不需要额外的能量来再生碳酸盐。此外，与压缩 CO2 相比，碳酸氢盐水溶液的运输成本更低，而且使用碳酸氢盐也为 CO2 输送到藻类培养系统提供了更好的替代方案。
