Electro-Fenton Based Technique to Enhance Cell Harvest and Lipid Extraction from Microalgae

Shuai Zhang; Yuyong Hou; Zhiyong Liu; Xiang Ji; Di Wu; Weijie Wang; Dongyuan Zhang; Wenya Wang; Shulin Chen; Fangjian Chen

doi:10.3390/en13153813

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Electro-Fenton Based Technique to Enhance Cell Harvest and Lipid Extraction from Microalgae

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Electro-Fenton Based Technique to Enhance Cell Harvest and Lipid Extraction from Microalgae

Shuai Zhang, Yuyong Hou, Zhiyong Liu, Xiang Ji, Di Wu, Weijie Wang, Dongyuan Zhang, Wenya Wang, Shulin Chen and Fangjian Chen

Energies (Basel), Vol.13(15), p.3813

07/24/2020

DOI: https://doi.org/10.3390/en13153813

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https://hdl.handle.net/2376/118007

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Abstract

Currently, lipid extraction remains a major bottleneck in microalgae technology for biofuel production. In this study, an effective and easily controlled cell wall disruption method based on electro-Fenton reaction was used to enhance lipid extraction from the wet biomass of Nannochloropsis oceanica IMET1. The results showed that 1.27 mM of hydroxide radical (HO•) was generated under the optimal conditions with 9.1 mM FeSO4 in a 16.4 mA·cm−2 current density for 37.0 min. After the electro-Fenton treatment, the neutral lipid extraction yield of microalgae (~155 mg) increased from 40% to 87.5%, equal to from 12.2% to 26.7% dry cell weight (DCW). In particular, the fatty acid composition remained stable. The cell wall disruption and lipid extraction processes were displayed by the transmission electron microscope (TEM) and fluorescence microscopy (FM) observations, respectively. Meanwhile, the removal efficiency of algal cells reached 85.2% within 2 h after the reaction was terminated. Furthermore, the biomass of the microalgae cultured in the electrolysis wastewater treated with fresh nutrients reached 3 g/L, which is 12-fold higher than that of the initial after 24 days. These finds provided an economic and efficient method for lipid extraction from wet microalgae, which could be easily controlled by current magnitude regulation.

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Title: Electro-Fenton Based Technique to Enhance Cell Harvest and Lipid Extraction from Microalgae
Creators: Shuai Zhang
Yuyong Hou
Zhiyong Liu
Xiang Ji
Di Wu
Weijie Wang
Dongyuan Zhang
Wenya Wang
Shulin Chen
Fangjian Chen
Publication Details: Energies (Basel), Vol.13(15), p.3813
Academic Unit: Biological Systems Engineering, Department of
Identifiers: 99900582322601842
Language: English
Resource Type: Journal article