磷源调控蛋白核小球藻胞外聚合物及生物絮凝性

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Abstract The efficient harvesting of oil-producing microalgae is a bottleneck problem that restricts the use of microalgae to produce biodiesel. Among them, the biological method has become a research hotspot. However, research on how phosphorus affects the growth, oil production, and bioflocculation of microalgae are still limited. In this study, four groups (IP, OP, NMP, and cNMP) of 59kinds of phosphorus were selected to cultivate Chlorella pyrenoidosa, and their growth, oil production, cell settling, and composition of extracellular polymers were studied. It was found that the IP group had the highest growth promotion effect on Chlorella pyrenoidosa (average algal cell density was 2.92×10⁸ cells/mL), and the oil levels of algal cells cultured in the OP group reached 17.45%, higher than the other three groups, while the average settling velocity of cNMP group was the best, reaching 13.79mm/min. In conclusion, methylene piphosphonic acid, triethyl phosphate, and 6-phospho-gluamic acid are the phosphorus with the best comprehensive benefits for cultivating Chlorella pyrenoidosa for oil production.

Key words： chlorella pyrenoidosa phosphorus lipid self-flocculation regulation

Received: 22 September 2022

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	Articles by authors
	ZHENG Lei
	XING Yu-zi
	SONG Jian-xin
	PENG Zheng
	LIU Ting-ting
	XIE En

Cite this article:

ZHENG Lei,XING Yu-zi,SONG Jian-xin等. Phosphorus source regulates extracellular polymers and bioflocculation of Chlorella pyrenoidosa[J]. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(3): 1097-1106.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2023/V43/I3/1097

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