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| Theoretical model prediction and experimental study on production of high oil content algae powder in large industrial photobioreactors |
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| DOI：10.19902/j.cnki.zgyz.1003-7969.240445 |
| KeyWord:theoretical model high oil content biomass yield N. oceanica industrial production |
| FundProject:广东省重点领域研发计划(2022B0111130003)；浙江省领雁研发攻关计划(2024C03110） |
| Author Name | Affiliation | | HUANG Cong1, HE Rong 1, WEI Shuai1, CHEN Zhanping1, LI Jun2,
YANG Huangpeng2, WANG Zhenyi3, XIN Kai3, CHENG Jun3,4 | 1.Guangdong Yuedian Zhanjiang Biomass Power Co. , Ltd. , Zhanjiang 524300, Guangdong, China
2.Guangdong Yuedian Environmental Protection Co. , Ltd. , Zhanjiang 510630, Guangdong, China
3.State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
4.Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of
Education, Chongqing University, Chongqing 400044, China |
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| Abstract: |
| Industrial-scale photoautotrophic microalgae biomass has low oil content, which cannot meet the requirements for biodiesel production. The cultivation process lacks guidance, and existing theoretical models have not been verified for industrial-scale applications. To predict and adjust the production process of large-scale industrial photobioreactors, the technical challenges and improvement measures for producing high oil content Nannochloropsis oceanica biomass were analyzed and discussed. Based on a light absorption coefficient（f2）estimation method and theoretical model of maximum biomass yield, a low-cost cultivation scheme to produce high oil content N. oceanica biomass was proposed, which was tested in a factory. Practice showed that under the conditions of runway pool 26 as a photoreactor, algal solution height of 15 cm, and nitrogen supply of 1/9 modified f/2 medium, the algal powder of N. oceanica with oil content higher than 30% was successfully produced. In conclusion, the established model for predicting the photosynthetic growth of N. oceanica is feasible, and by adjusting the height of the algal solution in the runway pool and the nitrogen content of the culture medium, the algal powder of N. oceanica with high oil content can be produced. |
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