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<p>The global quantity of food waste (FW) is increasing at an alarming rate, making safe disposal a pressing issue in urban management. The inappropriate disposal of FW will put risks on health and environment. Aerobic degradation equipment has emerged as a promising solution for FW disposal by adding microbial agents. However, current equipment faces challenges such as long processing duration and low efficiency. Therefore, we investigated the impact of combining microbial agents with iron oxide nano-resin (Fe<sub>2</sub>O<sub>3</sub>@D201) on the aerobic degradation of FW. We conducted experiments using 10% microbial agents supplemented with 6% Fe<sub>2</sub>O<sub>3</sub>@D201 for FW degradation. Compared to the control group containing 10% microbial agents, the Fe<sub>2</sub>O<sub>3</sub>@D201-treated group showed higher levels of dissolved COD in the leachate, reaching 1.59 × 10<sup>5</sup>&#xa0;mg/L. Furthermore, the microbial hydrolytic enzyme activities in FW of this group surpassed those of the control group, with cellulase activity peaking at 0.13 U compared to the control group’s peak of 0.06 U. Through 16S rRNA gene amplicon sequencing, we found that Fe<sub>2</sub>O<sub>3</sub>@D201 significantly enriched the abundance of <i>Bacillus</i>, which are commonly known for their hydrolysis functions. The results indicated that Fe<sub>2</sub>O<sub>3</sub>@D201 enhanced FW degradation by promoting the abundance of specialized microorganisms, and thus increased the hydrolytic enzyme activity, promoting the conversion of solid macromolecules into soluble organic matter. Consequently, Fe<sub>2</sub>O<sub>3</sub>@D201 shows potential for application in FW treatment equipment.</p>

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Fe2O3@D201 Enhanced Efficiency of Food Waste Degradation by Microbial Inoculum Under Aerobic Condition

  • 期刊论文

  • 发表日期：

    2025年4月2日

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  • Ying Han,
  • Meiqi Yin,
  • Qingrui Zhang,
  • Lili Tian,
  • Hao Wu,
  • Yu Song,
  • Xin He

摘要

The global quantity of food waste (FW) is increasing at an alarming rate, making safe disposal a pressing issue in urban management. The inappropriate disposal of FW will put risks on health and environment. Aerobic degradation equipment has emerged as a promising solution for FW disposal by adding microbial agents. However, current equipment faces challenges such as long processing duration and low efficiency. Therefore, we investigated the impact of combining microbial agents with iron oxide nano-resin (Fe2O3@D201) on the aerobic degradation of FW. We conducted experiments using 10% microbial agents supplemented with 6% Fe2O3@D201 for FW degradation. Compared to the control group containing 10% microbial agents, the Fe2O3@D201-treated group showed higher levels of dissolved COD in the leachate, reaching 1.59 × 105 mg/L. Furthermore, the microbial hydrolytic enzyme activities in FW of this group surpassed those of the control group, with cellulase activity peaking at 0.13 U compared to the control group’s peak of 0.06 U. Through 16S rRNA gene amplicon sequencing, we found that Fe2O3@D201 significantly enriched the abundance of Bacillus, which are commonly known for their hydrolysis functions. The results indicated that Fe2O3@D201 enhanced FW degradation by promoting the abundance of specialized microorganisms, and thus increased the hydrolytic enzyme activity, promoting the conversion of solid macromolecules into soluble organic matter. Consequently, Fe2O3@D201 shows potential for application in FW treatment equipment.