期刊
BIORESOURCE TECHNOLOGY
卷 252, 期 -, 页码 14-19出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.12.046
关键词
Continuously pre-harvesting; Spirulina platensis; Microalgae production; Optimal light distribution; Stabilized biomass concentration
资金
- Xiamen Southern Oceanographic Center of Fujian Province of China [14CZP046HJ20]
To improve the microalgae production in batch cultivation, a cultivation mode that continuously pre-harvesting Spirulina platensis from photobioreactor (PBR) with culture medium recycling was proposed. For realizing the continuously pre-harvesting cultivation mode, a Spirulina platensis culture column PBR with overflowing device was designed, which could adjust pre-harvesting rate through the overflowing device. By adjusting the preharvesting rate, the biomass concentration could be kept when biomass accumulation and pre-harvesting biomass were equal. Hence, the meridional light attenuation could be reduced by controlling biomass concentration in PBR. The maximum microalgae production were 44.6%, 10.98% higher in total production than that cultivated in batch cultivation without pre-harvesting and periodically pre-harvesting cultivation mode respectively, which was realized in pre-harvesting rate 0.228 mL min(-1) and biomass concentration 1.8 g L-1. Besides, a model was built by mass balance and polynomial fitting for evaluating the continuously pre-harvesting cultivation mode.
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