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Combined Effects of Acidification, Zeolite, and Biochar on Ammonia Emission and Nitrate Leaching from Pig Slurry

  • Sang-Hyun Park (Department of Animal Science, Institute of Agricultural Science and Technology, College of Agriculture & Life Science, Chonnam National University) ;
  • Muchamad Muchlas (Department of Animal Science, Institute of Agricultural Science and Technology, College of Agriculture & Life Science, Chonnam National University) ;
  • Tae-Hwan Kim (Department of Animal Science, Institute of Agricultural Science and Technology, College of Agriculture & Life Science, Chonnam National University) ;
  • Bok-Rye Lee (Department of Animal Science, Institute of Agricultural Science and Technology, College of Agriculture & Life Science, Chonnam National University)
  • 투고 : 2024.06.21
  • 심사 : 2024.06.27
  • 발행 : 2024.06.30

초록

This study aimed to evaluate the efficiency of combining acidification with adsorbents (zeolite and biochar) to mitigate the environmental impacts of pig slurry, focusing on ammonia (NH3) emission and nitrate (NO3-) leaching. The four treatments were applied: 1) pig slurry (PS) alone as a control, 2) acidified PS (AP), 3) acidified pig slurry with zeolite (APZ), and 4) acidified pig slurry with biochar (APB). The AP mitigates NH3 emission and NO3- leaching compared to PS alone. Acidification reduced the cumulative NH3 emission and its emission factor by 35.9% and 12.5%, respectively. The APZ and APB increased NH4+-N concentration, with the highest level in APB, compared to AP. The NH4+ adsorption capacity of APB (0.90 mg g-1) was higher than that of APZ (0.63 mg g-1). The APB and APZ treatments induced less NH3 emission compared to AP. The cumulative NH3 emission was reduced by 12.2% and 27.6% in APZ and APB, respectively, compared to AP treatment. NO3- leaching began to appear on days 12 and 13, and its peak reached on days 16 and 17, which were later than AP. The cumulative NO3- leaching decreased by 17.7% and 25.0% in APZ and APB, respectively, compared to AP treatment. These results suggest that combining biochar or zeolite with acidified pig slurry is an effective method to mitigate NH3 emission and NO3- leaching, with biochar being particularly effective.

키워드

과제정보

This work was supported by the National Research Foundation of the Republic of Korea (grant number NRF-2022R1C1C2011575).

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