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WANG Xinzi, WANG Pan, YANG Xinyu, LI Yingnan, REN Lianhai. EFFECT OF BIOCHAR-nZVI ON PERFORMANCE OF FOOD WASTE ANAEROBIC DIGESTION[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 154-161. doi: 10.13205/j.hjgc.202308019
Citation: WANG Xinzi, WANG Pan, YANG Xinyu, LI Yingnan, REN Lianhai. EFFECT OF BIOCHAR-nZVI ON PERFORMANCE OF FOOD WASTE ANAEROBIC DIGESTION[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 154-161. doi: 10.13205/j.hjgc.202308019

EFFECT OF BIOCHAR-nZVI ON PERFORMANCE OF FOOD WASTE ANAEROBIC DIGESTION

doi: 10.13205/j.hjgc.202308019
  • Received Date: 2022-01-16
    Available Online: 2023-11-15
  • In this study, biochar (BC) was prepared by pyrolysis of waste sugarcane bagasse and biochar loaded with nano-zero valent iron (BC-nZVI). The effects of different BC-nZVI dosages (0, 0.1, 0.5, 1 and 2 g/L) on the performance of anaerobic digestion of food waste were investigated under medium and high-temperature conditions and their promotion mechanism was discussed. The results showed that the addition of BC-nZVI significantly increased the cumulative methane production of the anaerobic digestion system and reduced the fermentation delay period. The best results were obtained at 0.5 g/L, with an increase of 36.88% and 45.55% in the medium and high temperature treatments, respectively, compared to the control group. In addition, this study investigated the effect of BC-nZVI on the anaerobic digestion performance of food waste using structural equation modelling. The results showed that fermentation time, NH4+-N, temperature and BC-nZVI significantly affected the cumulative methane production. the porous structure of BC-nZVI has a buffering effect on volatile fatty acids, which helps maintain the system stability and provides growth sites for microorganisms. This study provides a scientific basis for the resource utilization of food waste and a guide for the enhanced anaerobic digestion technology of BC-nZVI.
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