用聚乙二醇促进 15%体积比 CO2 条件下的海洋小球藻生长。
Using polyethylene glycol to promote Nannochloropsis oceanica growth with 15 vol% CO.
机构信息
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China.
出版信息
Sci Total Environ. 2020 Jun 10;720:137598. doi: 10.1016/j.scitotenv.2020.137598. Epub 2020 Feb 26.
CO capture with microalgae has been put forward in response to global concern on greenhouse gas emission. However, the short residence time and slow diffusion of CO in water limits the growth of microalgae. In order to improve CO transfer from gas phase to liquid phase and utilization by algal cells, polyethylene glycol 200 (PEG 200) was used as CO absorbent to promote growth of Nannochloropsis oceanica with the bubbling of 15 vol% CO. Total inorganic carbon (TIC) absorbed in culture medium remained constant at 5.6 mM when 15 vol% CO was bubbled continuously. PEG 200 in the medium provided additional CO absorption from 0.6 to 4.8 mM when PEG 200 concentration increased from 0.5 to 4 mM. The specific growth rate of N. oceanica reached the maximum (1.41 d) with 1 mM PEG 200 in culture medium, which was 21.5% higher than the specific growth rate without PEG 200. About 79% of the increase in biomass was attributed to the increased TIC with more CO dissolution in culture medium because of PEG 200, and about 21% was attributed to PEG 200 itself utilized as an organic carbon source. In conclusion, PEG 200 as a CO absorbent can effectively capture flue-gas CO for algal growth.
为应对全球温室气体排放问题，人们提出了利用微藻进行 CO 捕获。然而，CO 在水中的短停留时间和缓慢扩散限制了微藻的生长。为了提高 CO 从气相向液相的传递速率，并促进藻细胞利用 CO，采用聚乙二醇 200（PEG 200）作为 CO 吸收剂，通过 15%体积比 CO 的鼓泡来促进海洋微拟球藻的生长。当连续鼓入 15%体积比 CO 时，培养基中总无机碳（TIC）保持在 5.6 mM 不变。当 PEG 200 浓度从 0.5 增加到 4 mM 时，培养基中 PEG 200 提供了额外的 CO 吸收，从 0.6 增加到 4.8 mM。当培养基中含有 1 mM PEG 200 时，海洋微拟球藻的比生长速率达到最大值（1.41 d），比不含 PEG 200 时提高了 21.5%。生物量的增加约 79%归因于培养基中 TIC 的增加，因为 CO 更多地溶解在培养基中，这是由于 PEG 200 的存在；约 21%归因于 PEG 200 本身被用作有机碳源。总之，PEG 200 作为 CO 吸收剂可以有效地捕获烟道气 CO 以促进藻类生长。
Zotero 插件