Clean Style Recovery and Utilization of Residual Nutrients in Effluents From Biohydrogen Production: In Situ Immobilization Based on Sodium Alginate

文献类型： 外文期刊

第一作者： Ai, Fuke

作者： Ai, Fuke;Zhang, Yang;Fan, Xiaoni;Li, Yameng;Zhang, Haorui;Jiao, Yinggang;Zhang, Quanguo;Zhang, Zhiping;Ai, Fuke;Zhang, Haorui;Yong, Cheng;Zhao, Jinfei;Petracchini, Francesco;Paolini, Valerio

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关键词： sodium alginate; slurry capsule; fermentative biohydrogen production; immobilization effect; fertilizer

期刊名称：FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY （ 影响因子：6.064； 五年影响因子：6.303 ）

ISSN： 2296-4185

年卷期： 2022 年 10 卷

页码：

收录情况： SCI

摘要： Clean- and high-value recovery and reuse of the residue of biohydrogen production (biohydrogen slurry) is an urgent problem to be solved. In this study, sodium alginate (SA) gel was used to concentrate nutrients quickly in situ from biohydrogen slurry, which was prepared into gel microspheres (GMs), just like "capsule." The immobilization and release efficiency of conventional and reverse spherification were investigated. Better immobilization and release efficiency were detected under the conventional spherification method. The effect of GM sizes and concentrations of SA and calcium chloride (CaCl2) was further studied in terms of sphericity factor, nutrient release, yield, encapsulation efficiency, and loading capacity. The best immobilization effect was obtained with a 1.6-mm syringe needle, 3.0 wt% SA, and 6 wt% CaCl2, in which the sphericity factor, nitrogen release, yield, nitrogen encapsulation efficiency, and nitrogen loading capacity reached to 0.047, 96.20, 77.68, 38.37, and 0.0476%, respectively. This process not only avoids environmental pollution from biohydrogen slurry but also uses them at a high value as a fertilizer to nourish the soil. The feasibility of "slurry capsule" preparation will realize the clean recovery and reuse of biohydrogen slurry, which provides a new idea for ecological protection and carbon neutral goals and has important significance for sustainable development.

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