The effect of Fenton sludge on anaerobic digestion of papermaking wastewater in an upflow anaerobic sludge blanket reactor

被引:3
作者
Wang, Xianbao [1 ,2 ]
Zhang, Jialu [1 ]
Xie, Yili [1 ]
Li, Xiang [1 ]
Ran, Jiarong [1 ]
Zhang, Minting [1 ]
Zhang, Lixin [1 ,2 ]
Zhang, Anlong [1 ,2 ]
机构
[1] Shaanxi Univ Sci & Technol, Sch Environm Sci & Engn, Xian 710021, Shaanxi, Peoples R China
[2] China Light Ind Water Pollut Control Engn Ctr, Xian 710021, Shaanxi, Peoples R China
基金
中国国家自然科学基金;
关键词
Papermaking wastewater; Anaerobic digestion; Fenton sludge; Electron transfer; Dissimilatory iron reduction; INTERSPECIES ELECTRON-TRANSFER; EXTRACELLULAR POLYMERIC SUBSTANCES; MICROBIAL COMMUNITY; FOOD WASTE; METHANE PRODUCTION; MAGNETITE; CARBON; MECHANISM; METHANOGENESIS; FERMENTATION;
D O I
10.1016/j.jenvman.2024.122762
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
An upflow anaerobic sludge blanket (UASB) reactor was used to investigate the effect of adding Fenton sludge (FS) on the anaerobic digestion of actual papermaking wastewater. The results showed that a one-time addition of 10 g/L FS could sustainably promote the performance of UASB for more than 40 days. The organic matter removal efficiency increased by 15.56%, and the biogas production increased by 24.52%. The proportion of methane in biogas increased by 12.87%. Adding FS increased the capacitance values of sludge extracellular polymeric substances and the electron transfer system activity in reactor increased by 1.76 times. The dehydrogenase activity and coenzyme F 420 of the sludge increased by 1.54 and 2.11 times, respectively. Adding FS enriched the iron-reducing bacteria ( Thermodesulfobacteriota ) and hydrolytic acid-producing bacteria ( Chloro- flexota and Synergistota), ), thereby promoting the hydrolysis and acidification process. Adding FS was beneficial to the enrichment of methanogen, especially Methanosaeta, , significantly increasing the methane production.
引用
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页数:9
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