Feasibility and mechanism of recycling carbon resources from waste cyanobacteria and reducing microcystin toxicity by dielectric barrier discharge plasma
文献类型： 外文期刊
作者： Wang, Jie 1 ; Cheng, Guofeng 1 ; Zhang, Jiahua 1 ; Shangguan, Yuyi 3 ; Lu, Ming 4 ; 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.Minist Agr & Rural Affairs, Key Lab Aquaculture Facil Engn, 63 Chifeng Rd, Shanghai 200092, Peoples R China
3.East China Normal Univ, Shanghai Key Lab Urban Ecol Proc & Ecorestorat, 500 Dongchuan Rd, Shanghai 200241, Peoples R China
4.Univ Shanghai Sci & Technol, Sch Environm & Architecture, 516 Jungong Rd, Shanghai 200093, Peoples R China
关键词： Short-chain fatty acids (SCFAs); Plasma technology; Advanced oxidation technology; Anaerobic fermentation; Reactive oxygen species (ROS)
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）
ISSN： 0304-3894
年卷期： 2023 年 460 卷
页码：
收录情况： SCI
摘要： Recycling carbon resources from discarded cyanobacteria is a worthwhile research topic. This study focuses on the use of dielectric barrier discharge (DBD) plasma technology as a pretreatment for anaerobic fermentation of cyanobacteria. The DBD group (58.5 W, 45 min) accumulated the most short chain fatty acids (SCFAs) along with acetate, which were 3.0 and 3.3 times higher than the control. The DBD oxidation system can effectively collapse cyanobacteria extracellular polymer substances and cellular structure, improve the biodegradability of dissolved organic matter, enrich microorganisms produced by hydrolysis and SCFAs, reduce the abundance of SCFAs consumers, thereby promoting the accumulation of SCFAs and accelerating the fermentation process. The microcystin-LR removal rate of 39.8% was obtained in DBD group (58.5 W, 45 min) on day 6 of anaerobic fermentation. The toxicity analysis using the ECOSAR program showed that compared to microcystin-LR, the toxicity of degradation intermediates was reduced. The contribution order of functional active substances to cyanobacteria cracking was obtained as e(aq)(-) > & BULL;OH > O-1(2) > & BULL;O-2(-) > ONOO-, while the contribution order to microcystin-LR degradation was e(aq)(-) > & BULL;OH > & BULL;O-2(-) > O-1(2) > ONOO-. DBD has the potential to be a revolutionary pretreatment method for cyanobacteria anaerobic fermentation.
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