期刊
APPLIED ENERGY
卷 88, 期 10, 页码 3357-3369出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2011.02.013
关键词
Nanobubbles; Microbubbles; Nonlinear wave dynamics; Microfluidics; Microalgae; Airlift loop bioreactor
资金
- Technology Strategy Board [BR046G]
- Royal Society
- Carbon Trust
- Czech Academy of Science [AV0Z20760514]
- Graeme Fielden and Hannah Nolan of Suprafilt, Rochdale England
- Engineering and Physical Sciences Research Council [EP/E036252/1] Funding Source: researchfish
- EPSRC [EP/E036252/1] Funding Source: UKRI
This study was conducted to test the feasibility of growing microalgae on steel plant exhaust gas, generated from the combustion of offgases from steel processing, which has a high CO2 content. Two field trials of batch algal biomass growth, mediated by microbubble transfer processes in an airlift loop bioreactor showed only steady growth of biomass with 100% survival rate. The gas analysis of CO2 uptake in the 22001 bioreactor showed a specific uptake rate of 0.1 g/L/h, an average 14% of the CO2 available in the exhaust gas with a 23% composition of CO2. This uptake led to a steady production of chlorophyll and total lipid constituency in the bioreactor, and an accelerating exponential growth rate of biomass, with a top doubling time of 1.8 days. The gas analysis also showed anti-correlation of CO2 uptake and O-2 production, which along with the apparent stripping of the O-2 to the equilibrium level by the microbubbles, strongly suggests that the bioreactor is not mass transfer limited, nor O-2 inhibited. Removing O-2 inhibition results in high growth rates and high density of biomass. (C) 2011 Elsevier Ltd. All rights reserved.
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