Mechanism of dielectric barrier discharge plasma coupled with calcium peroxide to improve the quantity and quality of short chain fatty acids in anaerobic fermentation of cyanobacteria

文献类型： 外文期刊

第一作者： Wang Jie

作者： Wang Jie;Cheng Guofeng;Zhang Jiahua;Liu Xingguo;Wang Jie;Cheng Guofeng;Zhang Jiahua;Liu Xingguo;Shangguan Yuyi;Lu Ming

作者机构：

关键词： Algae; Anaerobic fermentation; Microcystin; Reactive oxygen species (ROS); Advanced oxidation technology

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：15.1； 五年影响因子：14.3 ）

ISSN： 1385-8947

年卷期： 2023 年 455 卷

页码：

收录情况： SCI

摘要： The recycling of high-value carbon resources from waste cyanobacteria is an interesting research direction. In this study, the feasibility of barrier discharge plasma coupled with calcium peroxide (DBD/CaO2) as a novel pretreatment method to improve the quantity and quality of short chain fatty acids (SCFAs) in anaerobic fermentation of cyanobacteria was explored. The relatively excellent SCFAs and acetic acid production were obtained in DBD (58.5 W, 30 min)/CaO2 (0.09 g/g VSS) group, which were 6.7 and 7.5 times that of the control, respectively. DBD and CaO2 synergistically improved the solubilization of cyanobacteria polymers. Cell rupture occurs under the combined influence of physicochemical effect and intracellular oxidative stress. DBD/CaO2 was beneficial to reduce the adverse effect of humus on anaerobic fermentation and improve the biodegradability of dissolved organic matter. The accumulation of microorganisms related to hydrolysis and acidification and the reduction of SCFAs/acetic acid consumers were also related with the accumulation of SCFAs/acetic acid. DBD/CaO2 treatment achieved a 73.2 % removal rate of microcystin-LR on the 5th day of anaerobic fermentation. The contribution order of functional active species to cyanobacteria solubilization and microcystin-LR degradation was e-aq > .OH > O-1(2) > .O-2.O-2(-) .O-2(-) > ONOO- and e-aq > .OH > .O-2 > O-1(2) > ONOO-, respectively. Finally, the synergistic mechanism of DBD and CaO2 in cyanobacteria anaerobic fermentation was expounded. This work provides an attractive and promising technology to recover valuable carbon sources from cyanobacteria.

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[1]Mechanism of dielectric barrier plasma technology to improve the quantity and quality of short chain fatty acids in anaerobic fermentation of cyanobacteria. Wang, Jie,Liu, Xingguo,Shangguan, Yuyi,Lu, Ming,Xu, Junli. 2023

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