Enhancement Effects and Mechanisms of Microscale Zero Valent Iron on the Performance of Anaerobic Co-digestion of Waste Activated Sludge and Food Waste

被引：3
|
作者：
Chen S.-J. [1 ,2 ]
Yao F.-B. [1 ,2 ]
Pi Z.-J. [1 ,2 ]
Hou K.-J. [1 ,2 ]
He L. [1 ,2 ]
Li X.-M. [1 ,2 ]
Wang D.-B. [1 ,2 ]
Yang Q. [1 ,2 ]
机构：
[1] College of Environmental Science and Engineering, Hunan University, Changsha
[2] Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha
来源：
Huanjing Kexue/Environmental Science | 2021年 / 42卷 / 02期
关键词：
Anaerobic co-digestion; Direct interspecies electron transfer (DIET); Food waste; Microbial community; Microscale zero valent iron (mZVI); Waste activated sludge;
D O I：
10.13227/j.hjkx.202007035
中图分类号：
学科分类号：
摘要：
Focusing on low biogas yields in the anaerobic co-digestion of waste activated sludge and food waste, the enhancing effects and mechanisms of microscale zero valent iron (mZVI) on anaerobic co-digestion was investigated. The results indicated that the addition of mZVI enhanced the methanogenesis stage of co-digestion but had no significant effect on the solubilization, hydrolysis, and acidification stages. With a dosage of 10 g•L-1 mZVI, the cumulative methane yield (based on VS) within 15 days reached 238.68 mL•g-1, which was 20.05% higher than the control group. The mechanism analysis showed that mZVI promoted electron transport system (ETS) activity (based on INTF/TS), which increased to 21.50 mg•(g•h)-1 with 10 g•L-1 mZVI compared to 13.43 mg•(g•h)-1 in the control group. Furthermore, mZVI enhanced direct interspecies electron transfer (DIET) between specific bacteria and methanogens. Microbial community analysis demonstrated that the abundance of DIET-related microorganisms, such as Syntrophomonas, Methanosarcina, and Methanobacterium, was higher in presence of mZVI. © 2021, Science Press. All right reserved.
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页码：891 / 899
页数：8
相关论文
共 31 条
  • [11] Wu B, Yang Q, Yao F B, Et al., Evaluating the effect of biochar on mesophilic anaerobic digestion of waste activated sludge and microbial diversity[J], Bioresource Technology, 294, (2019)
  • [12] Yin Q D, Wu G X., Advances in direct interspecies electron transfer and conductive materials: electron flux, organic degradation and microbial interaction, Biotechnology Advances, 37, 8, (2019)
  • [13] CJ/T 221-2005, 城市污水处理厂污泥检验方法
  • [14] Chen H L, Yan Y Y, He Q B, Et al., Effects of mild thermal pretreatment on anaerobic digestibility of sludge with low organic content, Environmental Science, 34, 2, pp. 629-634, (2013)
  • [15] Liu J B, Ni X T, Wei Y S, Et al., Enhancement for anaerobic digestion of sewage sludge pretreated by microwave and its combined processes, Environmental Science, 35, 9, pp. 3455-3460, (2014)
  • [16] Liu X R, Xu Q X, Wang D B, Et al., Unveiling the mechanisms of how cationic polyacrylamide affects short-chain fatty acids accumulation during long-term anaerobic fermentation of waste activated sludge, Water Research, 155, pp. 142-151, (2019)
  • [17] Lizama A C, Figueiras C C, Pedreguera A Z, Et al., Enhancing the performance and stability of the anaerobic digestion of sewage sludge by zero valent iron nanoparticles dosage, Bioresource Technology, 275, pp. 352-359, (2019)
  • [18] Jiang Q, Chen Y D, Yu S K, Et al., Effects of citrus peel biochar on anaerobic co-digestion of food waste and sewage sludge and its direct interspecies electron transfer pathway study, Chemical Engineering Journal, 398, (2020)
  • [19] Liu Y W, Wang Q L, Zhang Y B, Et al., Zero valent iron significantly enhances methane production from waste activated sludge by improving biochemical methane potential rather than hydrolysis rate, Scientific Reports, 5, (2015)
  • [20] Lee E, Bittencourt P, Casimir L, Et al., Biogas production from high solids anaerobic co-digestion of food waste, yard waste and waste activated sludge, Waste Management, 95, pp. 432-439, (2019)
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