A Novel Salt-Bridge Electroflocculation Technology for Harvesting Microalgae
Microalgae biomass, as a promising alternative feedstock, can be refined into biodiesel, pharmaceutical, and food productions. However, the harvesting process for quality biomass still remains a main bottleneck due to its high energy demand. In this study, a novel technique integrating alkali-induce...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-06-01
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| Series: | Frontiers in Bioengineering and Biotechnology |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fbioe.2022.902524/full |
| _version_ | 1811337544124596224 |
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| author | Yuyong Hou Yuyong Hou Yuyong Hou Chenfeng Liu Zhiyong Liu Zhiyong Liu Tong Han Nahui Hao Zhile Guo Zhile Guo Weijie Wang Shulin Chen Lei Zhao Lei Zhao Maliheh Safavi Xiang Ji Fangjian Chen Fangjian Chen |
| author_facet | Yuyong Hou Yuyong Hou Yuyong Hou Chenfeng Liu Zhiyong Liu Zhiyong Liu Tong Han Nahui Hao Zhile Guo Zhile Guo Weijie Wang Shulin Chen Lei Zhao Lei Zhao Maliheh Safavi Xiang Ji Fangjian Chen Fangjian Chen |
| author_sort | Yuyong Hou |
| collection | DOAJ |
| description | Microalgae biomass, as a promising alternative feedstock, can be refined into biodiesel, pharmaceutical, and food productions. However, the harvesting process for quality biomass still remains a main bottleneck due to its high energy demand. In this study, a novel technique integrating alkali-induced flocculation and electrolysis, named salt-bridge electroflocculation (SBEF) with non-sacrificial carbon electrodes is developed to promote recovery efficiency and cost savings. The results show that the energy consumption decreased to 1.50 Wh/g biomass with a high harvesting efficiency of 90.4% under 300 mA in 45 min. The mean particle size of algae flocs increased 3.85-fold from 2.75 to 10.59 µm, which was convenient to the follow-up processing. Another major advantage of this method is that the salt-bridge firmly prevented cells being destroyed by the anode’s oxidation and did not bring any external contaminants to algal biomass and flocculated medium, which conquered the technical defects in electro-flocculation. The proposed SBEF technology could be used as a low cost process for efficient microalgae harvest with high quality biomass. |
| first_indexed | 2024-04-13T17:56:34Z |
| format | Article |
| id | doaj.art-d3fb2976d85b4b3082a7b84ce2e13aac |
| institution | Directory Open Access Journal |
| issn | 2296-4185 |
| language | English |
| last_indexed | 2024-04-13T17:56:34Z |
| publishDate | 2022-06-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Bioengineering and Biotechnology |
| spelling | doaj.art-d3fb2976d85b4b3082a7b84ce2e13aac2022-12-22T02:36:29ZengFrontiers Media S.A.Frontiers in Bioengineering and Biotechnology2296-41852022-06-011010.3389/fbioe.2022.902524902524A Novel Salt-Bridge Electroflocculation Technology for Harvesting MicroalgaeYuyong Hou0Yuyong Hou1Yuyong Hou2Chenfeng Liu3Zhiyong Liu4Zhiyong Liu5Tong Han6Nahui Hao7Zhile Guo8Zhile Guo9Weijie Wang10Shulin Chen11Lei Zhao12Lei Zhao13Maliheh Safavi14Xiang Ji15Fangjian Chen16Fangjian Chen17Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaCollege of Life Sciences, Inner Mongolia Agricultural University, Hohhot, ChinaNational Center of Technology Innovation for Synthetic Biology, Tianjin, ChinaKey Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaKey Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaNational Center of Technology Innovation for Synthetic Biology, Tianjin, ChinaKey Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaKey Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaKey Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaCollege of Life Science, North China University of Science and Technology, Tangshan, ChinaCollege of Life Science, North China University of Science and Technology, Tangshan, ChinaKey Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaKey Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaNational Center of Technology Innovation for Synthetic Biology, Tianjin, ChinaDepartment of Biotechnology, Iranian Research Organization for Science and Technology, Tehran, IranCollege of Life Sciences, Inner Mongolia Agricultural University, Hohhot, ChinaKey Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, ChinaNational Center of Technology Innovation for Synthetic Biology, Tianjin, ChinaMicroalgae biomass, as a promising alternative feedstock, can be refined into biodiesel, pharmaceutical, and food productions. However, the harvesting process for quality biomass still remains a main bottleneck due to its high energy demand. In this study, a novel technique integrating alkali-induced flocculation and electrolysis, named salt-bridge electroflocculation (SBEF) with non-sacrificial carbon electrodes is developed to promote recovery efficiency and cost savings. The results show that the energy consumption decreased to 1.50 Wh/g biomass with a high harvesting efficiency of 90.4% under 300 mA in 45 min. The mean particle size of algae flocs increased 3.85-fold from 2.75 to 10.59 µm, which was convenient to the follow-up processing. Another major advantage of this method is that the salt-bridge firmly prevented cells being destroyed by the anode’s oxidation and did not bring any external contaminants to algal biomass and flocculated medium, which conquered the technical defects in electro-flocculation. The proposed SBEF technology could be used as a low cost process for efficient microalgae harvest with high quality biomass.https://www.frontiersin.org/articles/10.3389/fbioe.2022.902524/fullmicroalgaeNannochloropsis oculataharvestingsalt-bridge electroflocculationrecovery efficiency |
| spellingShingle | Yuyong Hou Yuyong Hou Yuyong Hou Chenfeng Liu Zhiyong Liu Zhiyong Liu Tong Han Nahui Hao Zhile Guo Zhile Guo Weijie Wang Shulin Chen Lei Zhao Lei Zhao Maliheh Safavi Xiang Ji Fangjian Chen Fangjian Chen A Novel Salt-Bridge Electroflocculation Technology for Harvesting Microalgae Frontiers in Bioengineering and Biotechnology microalgae Nannochloropsis oculata harvesting salt-bridge electroflocculation recovery efficiency |
| title | A Novel Salt-Bridge Electroflocculation Technology for Harvesting Microalgae |
| title_full | A Novel Salt-Bridge Electroflocculation Technology for Harvesting Microalgae |
| title_fullStr | A Novel Salt-Bridge Electroflocculation Technology for Harvesting Microalgae |
| title_full_unstemmed | A Novel Salt-Bridge Electroflocculation Technology for Harvesting Microalgae |
| title_short | A Novel Salt-Bridge Electroflocculation Technology for Harvesting Microalgae |
| title_sort | novel salt bridge electroflocculation technology for harvesting microalgae |
| topic | microalgae Nannochloropsis oculata harvesting salt-bridge electroflocculation recovery efficiency |
| url | https://www.frontiersin.org/articles/10.3389/fbioe.2022.902524/full |
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