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Coproduction of amino acids and biohythane from microalgae via cascaded hydrothermal and anaerobic process

文献类型： 外文期刊

作者： Wu, Houkai 1 ; Huang, Sijie 1 ; Wang, Kaijun 3 ; Liu, Zhidan 1 ;

作者机构： 1.China Agr Univ, Coll Water Resources & Civil Engn, Lab Environm Enhancing Energy E2E, Beijing 100083, Peoples R China

2.Minist Agr, Key Lab Agr Engn Struct & Environm, Beijing 100083, Peoples R China

3.Tsinghua Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing 100084, Peoples R China

4.Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing 100081, Peoples R China

5.China Agr Univ, 17 Tsinghua East Rd, Beijing 100083, Peoples R China

关键词： Algalbiorefinery; Hydrothermal converstion; Two-stage anaerobic fermentation; Amino acid; Biohythane

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：9.8； 五年影响因子：9.6 ）

ISSN： 0048-9697

年卷期： 2023 年 872 卷

页码：

收录情况： SCI

摘要： In search of the candidate for animal feed and clean energy, a new vision of algal biorefinery was firstly proposed to coproduce amino acids and biohythane via hydrothermal treatment and two-stage anaerobic fermentation. This study focused on the comprehensive analysis of amino acids recovered from Chlorella sp. and the subsequent biohythane production from microalgal residues. The content and recovery rate of amino acids were in the range of 2.07-27.62 g/100 g and 3.65 %-48.66 % with increasing temperature due to more cell wall disruptions. Furthermore, it was rich in essential amino acids for livestock, including leucine, arginine, isoleucine, valine and phenylalanine. A comparable hydrogen production (9 mL/g volatile solids (VS)) was reached at 70 degrees C and 90 degrees C, while it reduced to 5.84 mL/gVS at 150 degrees C. The group at 70 degrees C got the maximum methane generation of 311.9 mL/gVS, which was 16.67 %, 24.94 %, 38.38 % and 46.49 % higher than that of other groups. Microalgal residues at lower temperature contained more organics, which was the reason for the better biohythane production. The coproduction of amino acids and biohythane at 130 degrees C was favorable, which led to 43.71 % amino acids recovery and 93.82 mL biohythane production from per gVS of Chlorella sp. The improved microalgal biorefinery could provide an alternative way to mitigate the crisis of food and energy, but animal experimentations and techno-economic assessments should be considered for further study.

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