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Shell‐derived chitosan as a green flocculant to harvest microalgae for biofuel production
Biofuels, Bioproducts and Biorefining ( IF 3.2 ) Pub Date : 2021-02-09 , DOI: 10.1002/bbb.2197
Zhihong Yin 1 , Dan Hu 1 , Xinzhu Li 1 , Yueni Zhong 1 , Liandong Zhu 1, 2
Affiliation  

Microalgae are considered to be the feedstock for third‐generation biofuels but there are still no commercial applications of microalgae biomass. This is due to the costly harvesting process, resulting from their specific characteristics such as small cell sizes, negatively charged surfaces, and stable dispersion in culture broths. Chitosan derived from crustacean shells, as a highly efficient and non‐toxic flocculant for the harvesting of microalgae, can simultaneously achieve value‐added recycling of shell wastes and efficient flocculation of microalgal biomass. Shell‐derived chitosan is a biopolymer with a high economic value, which might promote shell waste resource utilization. Its application for microalgae harvesting also has no effect on the downstream process for biodiesel production. More than 90% of microalgal biomass can be harvested under certain conditions using chitosan as the flocculant, demonstrating a strong potential for practical application in future. The application of chitosan to flocculate microalgae still has some limitations, and efforts should be made regarding the enhancement of cost‐effectiveness, improvement of harvesting processes, scalability of practical application, and implementation of supporting policies. The contribution of this study lies in the combination of chitosan production from crustacean shell wastes and its application in microalgae harvesting, which can realize the value‐added recycling of shell wastes and efficient flocculation of microalgal biomass. © 2021 Society of Industrial Chemistry and John Wiley & Sons Ltd

中文翻译:

壳聚糖衍生的壳聚糖作为绿色絮凝剂,可收获微藻以生产生物燃料

微藻被认为是第三代生物燃料的原料,但是微藻生物质仍然没有商业应用。这是由于其特殊的特性(例如小细胞大小,带负电荷的表面以及在培养液中的稳定分散)所导致的昂贵的收获过程。源自甲壳类动物壳的壳聚糖是一种用于收获微藻的高效无毒絮凝剂,可同时实现壳废料的增值回收和微藻生物质的高效絮凝。壳牌衍生的壳聚糖是一种具有很高经济价值的生物聚合物,可能会促进壳牌废物的资源利用。它在微藻类收获中的应用对生物柴油生产的下游过程也没有影响。使用壳聚糖作为絮凝剂,在一定条件下可以收获超过90%的微藻生物质,这表明其在未来的实际应用中具有很大的潜力。壳聚糖在絮凝微藻中的应用仍然存在一些局限性,应努力提高成本效益,改进收获过程,扩大实际应用的可扩展性以及实施支持政策。这项研究的贡献在于将甲壳类贝壳废料生产的壳聚糖及其在微藻收获中的应用相结合,可以实现贝壳废料的增值回收和微藻生物质的高效絮凝。©2021工业化学学会和John Wiley&Sons Ltd 展示了在未来实际应用中的强大潜力。壳聚糖在絮凝微藻中的应用仍然存在一些局限性,应努力提高成本效益,改进收获过程,扩大实际应用的可扩展性以及实施支持政策。这项研究的贡献在于将甲壳类贝壳废料生产的壳聚糖及其在微藻收获中的应用相结合,可以实现贝壳废料的增值回收和微藻生物质的高效絮凝。©2021工业化学学会和John Wiley&Sons Ltd 展示了在未来实际应用中的强大潜力。壳聚糖在絮凝微藻中的应用仍然存在一些局限性,应努力提高成本效益,改进收获过程,扩大实际应用的可扩展性以及实施支持政策。这项研究的贡献在于将甲壳类贝壳废料生产的壳聚糖及其在微藻收获中的应用相结合,可以实现贝壳废料的增值回收和微藻生物质的有效絮凝。©2021工业化学学会和John Wiley&Sons Ltd 应当努力提高成本效益,改进收获过程,扩大实际应用范围和实施支持性政策。这项研究的贡献在于将甲壳类贝壳废料生产的壳聚糖及其在微藻收获中的应用相结合,可以实现贝壳废料的增值回收和微藻生物质的高效絮凝。©2021工业化学学会和John Wiley&Sons Ltd 应当努力提高成本效益,改进收获过程,扩大实际应用范围和实施支持性政策。这项研究的贡献在于将甲壳类贝壳废料生产的壳聚糖及其在微藻收获中的应用相结合,可以实现贝壳废料的增值回收和微藻生物质的高效絮凝。©2021工业化学学会和John Wiley&Sons Ltd 可以实现贝壳废料的增值回收和微藻生物质的高效絮凝。©2021工业化学学会和John Wiley&Sons Ltd 可以实现贝壳废料的增值回收和微藻生物质的高效絮凝。©2021工业化学学会和John Wiley&Sons Ltd
更新日期:2021-02-09
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