Mechanism of dielectric barrier plasma technology to improve the quantity and quality of short chain fatty acids in anaerobic fermentation of cyanobacteria
文献类型： 外文期刊
作者： Wang, Jie 1 ; Xu, Junli 4 ; Lu, Ming 3 ; Shangguan, Yuyi 2 ; Liu, Xingguo 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Fishery Machinery & Instrument Res Inst, 63 Chifeng Rd, Shanghai 200092, Peoples R China
2.East China Normal Univ, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, 500 Dongchuan Rd, Shanghai 200241, Peoples R China
3.Univ Shanghai Sci & Technol, Sch Environm & Architecture, 516 Jungong Rd, Shanghai 200093, Peoples R China
4.Yellow River Conservancy Tech Inst, Sch Ecol & Environm, 1 Dongjing Rd, Kaifeng 475004, Henan, Peoples R China
关键词： Algae; Anaerobic fermentation; Microcystin; Reactive oxygen species (ROS); Advanced oxidation technology
期刊名称：WASTE MANAGEMENT （ 影响因子：8.1； 五年影响因子：8.7 ）
ISSN： 0956-053X
年卷期： 2023 年 155 卷
页码：
收录情况： SCI
摘要： The recycling of high value carbon resources from cyanobacteria has become a research hotspot. This work investigated the possibility of dielectric barrier discharge (DBD) plasma pretreatment to improve the anaerobic fermentation performance of cyanobacteria. The maximum accumulations of short-chain fatty acids (SCFAs) and acetic acid in DBD group were 3.30 and 1.49 times of that in control group. The physical effects of DBD plasma and the oxidative stress response of cyanobacteria cells could improve the solubilization of cyanobacteria polymer. The destruction of humus by DBD plasma can reduce the negative impact of humus on the early stage of anaerobic fermentation, thus facilitating the rapid start of anaerobic fermentation. The contents of Bacteroidetes, Firmicutes and Chloroflexi in DBD group were higher than those in control group, while the content of Pro-teobacteria was on the contrary, which was conducive to the hydrolysis and acidification process. The decrease of Methanosaeta sp. and Methanosarcina sp. abundance in DBD group might be another reason for the increase of acetic acid ratio. Under the joint action of plasma chemical oxidation and microbial degradation, the degradation effect of microcystin-LR in the anaerobic fermentation supernatant of DBD group was better than that of the control group, which was conducive to the recycling of cyanobacteria anaerobic fermentation supernatant. Therefore, DBD pretreatment was conductive to recycling valuable carbon source from cyanobacteria and can be further developed as a potential new pretreatment technology.
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