Wang Xianbao, Zhang Jialu, Xie Yili, Li Xiang, Ran Jiarong, Zhang Minting, Zhang Lixin, Zhang Anlong
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi Province, 710021, China; China Light Industry Water Pollution Control Engineering Center, Xi'an, Shaanxi Province, 710021, China.
School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi Province, 710021, China.
J Environ Manage. 2024 Nov;370:122762. doi: 10.1016/j.jenvman.2024.122762. Epub 2024 Oct 3.
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 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 (Chloroflexota 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.
采用上流式厌氧污泥床（UASB）反应器研究添加芬顿污泥（FS）对实际造纸废水厌氧消化的影响。结果表明，一次性添加10 g/L FS可使UASB性能持续提升40多天。有机物去除效率提高了15.56%，沼气产量提高了24.52%。沼气中甲烷比例提高了12.87%。添加FS增加了污泥胞外聚合物的电容值，反应器中电子传递系统活性提高了1.76倍。污泥的脱氢酶活性和辅酶F分别提高了1.54倍和2.11倍。添加FS使铁还原菌（热脱硫杆菌门）和水解产酸菌（绿弯菌门和互营杆菌门）富集，从而促进了水解酸化过程。添加FS有利于产甲烷菌尤其是甲烷八叠球菌的富集，显著提高了甲烷产量。
