Fulvic acid, a humic substance with unique properties, has sparked interest due to its potential applications in the treatment of allergic diseases, Alzheimer's disease, and as a microplastic adsorbent. However, conventional extraction methods produce insufficient quantities for commercial use, which has prompted research to enhance fulvic acid production. In this study, we investigated the impact of Saccharomyces cerevisiae fermentation on the yield and spectral characteristics of fulvic acid extracted from white peat. Fulvic acid was extracted from both S. cerevisiae-treated and untreated white peats using acid precipitation. The yield of fulvic acid from the S. cerevisiae treated group reached its highest at 3.5 % after 72 hr of fermentation, which was significantly higher than the untreated group (1.1 %). Fourier Transform Infrared (FTIR) analysis revealed similarities in functional groups and characteristic absorption bands between the treated and untreated fulvic acid samples. These findings suggest that S. cerevisiae fermentation can increase the yield of fulvic acid extracted from white peat, providing a promising approach for enhancing the commercial viability of fulvic acid production.

Introduction
Materials and Methods
    1. Materials and Chemicals
    2. Sccharomyces cerevisiae culture
    3. Sccharomyces cerevisiae fermentation of white peat
    4. Extraction of fulvic acid
    5. Fourier transform infrared (FTIR) spectroscopy analysis
    6. Statistical analysis
Results and Discussion
    1. Effect of Sccharomyces cerevisiae fermentation onthe yield of fulvic acid
    2. Effect of Sccharomyces cerevisiae fermentation onthe yield of fulvic acid
    3. Fourier Transform Infrared spectra analysis
Acknowledgement

• Hyeon Cheol Kim(Master's course, Department of Environmental Forest Science, Gyeongsang National University, Jinju-daero, Jinju-si, Gyeongsangnam-Do, 52828, Republic of Korea)
• Si Young Ha(Research professor, Department of Environmental Forest Science, Gyeongsang National University, Jinju-daero, Jinju-si, Gyeongsangnam-Do, 52828, Republic of Korea)
• Jae Kyung Yang(Professor, Department of Environmental Forest Science/Institute of Agriculture and Life Science, Gyeongsang National University, Jinju-daero, Jinju-si, Gyeongsangnam-Do, 52828, Republic of Korea) Corresponding author