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<p>Food waste, characterized by high salinity and oil content, resists biodegradation, making conventional disposal methods inefficient. This study aimed to screen microbial strains tolerant to these conditions to enhance degradation efficiency. Strains were isolated from food waste, followed by gradient screening for salt/oil tolerance and amylase activity. Four efficient degraders were obtained: <i>Kocuria</i> sp. (M1-1), <i>Raoultella ornithinolytica</i> (M3-2), <i>Candida tropicalis</i> (Y4-2), and <i>Trichosporon</i> sp. (Y4-4), all exhibiting high stress tolerance, amylase production, and emulsifying ability. In simulated fermentation, the bacterial-fungal consortium (bacteria:fungi=1:2; 2% inoculum) achieved a high dry weight reduction within five days, with the E<sub>4</sub>/E<sub>6</sub> ratio indicating resource recovery potential. This tailored consortium synergistically degrades high-salt-oil food waste, providing key microbial resources and a scientific basis for advancing industrial-scale biotreatment and green waste-management strategies.</p> Graphic Abstract <p></p>

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Screening and characterization of microbial consortia for biodegradation of high-salt and high-oil food waste

  • 期刊论文

  • 发表日期：

    2026年5月9日

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  • Meng Wang,
  • Lirong Xia,
  • Minghui Yang,
  • Hua Yang,
  • Zhongsheng Tang,
  • Yebao Chen,
  • Siming Zhu,
  • Junlin Wu

摘要

Food waste, characterized by high salinity and oil content, resists biodegradation, making conventional disposal methods inefficient. This study aimed to screen microbial strains tolerant to these conditions to enhance degradation efficiency. Strains were isolated from food waste, followed by gradient screening for salt/oil tolerance and amylase activity. Four efficient degraders were obtained: Kocuria sp. (M1-1), Raoultella ornithinolytica (M3-2), Candida tropicalis (Y4-2), and Trichosporon sp. (Y4-4), all exhibiting high stress tolerance, amylase production, and emulsifying ability. In simulated fermentation, the bacterial-fungal consortium (bacteria:fungi=1:2; 2% inoculum) achieved a high dry weight reduction within five days, with the E4/E6 ratio indicating resource recovery potential. This tailored consortium synergistically degrades high-salt-oil food waste, providing key microbial resources and a scientific basis for advancing industrial-scale biotreatment and green waste-management strategies.

Graphic Abstract