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TiO2 amendment accelerates low-temperature composting start-up.

Lei Xiao1, Zimin Wei2, Yuqing Wang1

  • 1College of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China.

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|November 23, 2025
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Summary
This summary is machine-generated.

Nano-titanium dioxide (TiO2) and a psychrophilic consortium (LY3) accelerate low-temperature composting of livestock manure. This synergistic approach enhances lipid degradation and shortens processing cycles for efficient waste management.

Keywords:
Low-temperature compostingPsychrophilic consortiumStart-up thermal mechanismTitanium dioxide addition

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Area of Science:

  • Environmental Science
  • Microbiology
  • Materials Science

Background:

  • Intensive livestock farming generates significant manure waste, posing environmental challenges due to long processing times and inadequate disposal standards.
  • Current composting methods struggle with efficiency and meeting regulatory requirements for livestock and poultry manure treatment.

Purpose of the Study:

  • To investigate the synergistic effect of nano-titanium dioxide (TiO2) and a psychrophilic consortium (LY3) on the start-up and efficiency of low-temperature composting.
  • To evaluate the impact of TiO2 and LY3 on lipid degradation rates and microbial community dynamics during manure composting.

Main Methods:

  • Low-temperature composting experiments were conducted using livestock manure with the addition of TiO2 and LY3.
  • 16S rRNA high-throughput sequencing was employed to analyze microbial community diversity and structure.
  • Structural Equation Modeling (SEM) was used to elucidate the mechanisms influencing the composting process.

Main Results:

  • The combination of TiO2 and LY3 significantly accelerated composting start-up and enhanced lipid degradation from 0.6% to 15%.
  • TiO2 modulated microbial community diversity and promoted synergistic interactions among functional microbial groups.
  • SEM analysis revealed a shift towards synergistic decomposition of organic fractions, shortening the composting cycle and improving degradation efficiency.

Conclusions:

  • Nano-TiO2 and LY3 exhibit a synergistic effect, optimizing low-temperature composting of livestock manure.
  • This approach offers a promising solution for efficient manure waste management, improving degradation rates and reducing processing times.
  • The study provides valuable theoretical and technological insights for the sustainable utilization of livestock and poultry manure resources.