Han Ying, Yin Meiqi, Zhang Qingrui, Tian Lili, Wu Hao, Song Yu, He Xin
School of Environmental and Chemical Engineering, YanShan University, 438# West Hebei Street, Haigang District, Qinhuangdao, 066004, Hebei, People's Republic of China.
Hebei Province Key Laboratory of Deep Remediation of Heavy Metals in Water and Resource Utilization, YanShan University, Qinhuangdao, 066004, People's Republic of China.
Curr Microbiol. 2025 Apr 2;82(5):224. doi: 10.1007/s00284-025-04215-z.
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 (FeO@D201) on the aerobic degradation of FW. We conducted experiments using 10% microbial agents supplemented with 6% FeO@D201 for FW degradation. Compared to the control group containing 10% microbial agents, the FeO@D201-treated group showed higher levels of dissolved COD in the leachate, reaching 1.59 × 10 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 FeO@D201 significantly enriched the abundance of Bacillus, which are commonly known for their hydrolysis functions. The results indicated that FeO@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, FeO@D201 shows potential for application in FW treatment equipment.
全球食物垃圾（FW）的数量正以惊人的速度增长，使得安全处置成为城市管理中的一个紧迫问题。食物垃圾的不当处置会给健康和环境带来风险。通过添加微生物剂，好氧降解设备已成为一种有前景的食物垃圾处置解决方案。然而，目前的设备面临着处理时间长和效率低等挑战。因此，我们研究了将微生物剂与氧化铁纳米树脂（FeO@D201）结合对食物垃圾好氧降解的影响。我们使用添加了6% FeO@D201的10%微生物剂进行食物垃圾降解实验。与含有10%微生物剂的对照组相比，FeO@D201处理组的渗滤液中溶解化学需氧量（COD）水平更高，达到1.59×10毫克/升。此外，该组食物垃圾中的微生物水解酶活性超过了对照组，纤维素酶活性峰值为0.13 U，而对照组的峰值为0.06 U。通过16S rRNA基因扩增子测序，我们发现FeO@D201显著富集了芽孢杆菌的丰度，芽孢杆菌以其水解功能而闻名。结果表明，FeO@D201通过促进特定微生物的丰度来增强食物垃圾的降解，从而提高水解酶活性，促进固体大分子转化为可溶性有机物。因此，FeO@D201在食物垃圾处理设备中显示出应用潜力。
