Eco-friendly microalgae harvesting using lipid-cored particles with a comparative life-cycle assessment

被引：2

作者：

Zou, Xiaotong ^{[1
,2
]}

Zhao, Shaohua ^{[1
]}

Xu, Kaiwei ^{[3
]}

Fang, Changqing ^{[1
,2
]}

Shen, Zhou ^{[4
]}

Yan, Chang ^{[1
]}

Dong, Liming ^{[1
]}

Qin, Zhaoyue ^{[1
]}

Zhao, Xinyue ^{[1
]}

Zhao, Jiajia ^{[1
]}

Liang, Xiongbo ^{[1
]}

机构：

[1] Xian Univ Technol, Fac Printing, Packaging Engn & Digital Media Technol, Xian 710048, Peoples R China

[2] Xian Univ Technol, Sch Mech & Precis Instrument Engn, Xian 710048, Peoples R China

[3] Xian Univ Sci & Technol, Coll Comp Sci & Technol, Xian 710054, Peoples R China

[4] Shaoxing Univ, Sch Life & Environm Sci, Huancheng West Rd 508, Shaoxing 312000, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2024年 / 392卷

关键词：

Lipid-cored particles; Microalgae; Harvesting; Surfactant; Life cycle assessment; WASTE-WATER; FOAM FLOTATION; FLOCCULATION; CHITOSAN; OIL;

D O I：

10.1016/j.biortech.2023.130023

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

This study proposed an innovative approach using lipid-cored particles (LCPs) aimed at addressing the efficiency, cost, and environmental impact challenges in microalgae harvesting. Cetyltrimethylammonium bromide (CTAB) and chitosan (CS) were used to modify LCPs and to optimize efficiency and investigate the mechanisms of harvesting with Chlorella vulgaris. Results showed that a maximum harvesting efficiency of 97.14 % was achieved using CS-LCPs. Zeta potential and microscopic images revealed the presence of embedded CS-LCPs within microalgal flocs. Fractal dimension data suggested looser aggregates of CS-LCPs and Chlorella vulgaris, corroborated by Excitation-emission matrices (EEM) analysis further confirmation the presence of bridging networks. Moreover, life cycle assessment of five harvesting methods pointed freshwater ecotoxicity potential (FEP) and terrestrial ecotoxicity potential (TEP) as major environmental impacts, mainly from flocculant use, carrier production, and electricity consumption. Notably, LCPs showed the lowest global warming potential (GWP) at 1.54 kg CO2 eq, offering a viable, low-carbon, cost-effective harvesting alternative.

引用

页数：10

共 33 条

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