Study on the changes in fertilizer components and germination index following concentration of filtered liquid fertilizer derived from swine manure

Ji-won Jung; Seung-Hyun Park; Soo-Ryang Kim; EDWIN SUNG HO Ju; Sung-Ha Hong; Myung-Gyu Lee

doi:10.11109/JAES.2025.27.1.051

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2025 Vol.27, Issue 1 Preview Page

Research article

Study on the changes in fertilizer components and germination index following concentration of filtered liquid fertilizer derived from swine manure 양돈분뇨 여과액비 농축에 따른 비료성분 및 발아지수 변화 특성 연구

30 April 2025. pp. 51-56

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Abstract

This study aimed to evaluate changes in fertilizer component concentrations and biological safety by applying a rotary vacuum evaporation process to filtered liquid fertilizer derived from swine manure. The primary objective was to promote the wide-area distribution of liquid fertilizer produced in nutrient-surplus regions by reducing its volume, with the assumption that the concentrate would be appropriately diluted for crop cultivation at the destination. The filtered liquid fertilizer was concentrated to 2×, 3×, and 4× levels. As the concentration ratio increased, the concentrations of nitrogen (N), phosphorus (P), and potassium (K) rose significantly. Phosphorus and potassium exhibited stable recovery rates above 88%, whereas nitrogen showed a decreasing recovery rate — 76.33% at 2×, 67.95% at 3×, and 60.42% at 4× — suggesting volatilization losses during the concentration process. The germination index (GI) decreased with increasing concentration, indicating higher biological toxicity. However, following 50% and 100% dilution treatments, the GI values recovered to above 70% across all concentration levels, confirming that dilution effectively mitigated toxicity. These findings suggest that post-concentration dilution is essential to ensure the safe agricultural application of concentrated filtered liquid fertilizer. Furthermore, this study provides foundational insights into optimizing the concentration process to minimize nitrogen losses and enhance biological safety, thereby supporting the sustainable utilization of concentrated liquid fertilizers in agriculture.

Keywords

Swine manure

Filtered liquid fertilizer

Vacuum evaporation concentration

Nutrient recovery

Germination index

References

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Information

Publisher :The Korean Society of Animal Environmental Science & Technology
Publisher(Ko) :(사)한국축산환경학회
Journal Title :Journal of Animal Environmental Science
Journal Title(Ko) :축산시설환경학회지
Volume : 27
No :1
Pages :51-56
Received Date : 2025-04-22
Revised Date : 2025-04-28
Accepted Date : 2025-04-29
DOI :https://doi.org/10.11109/JAES.2025.27.1.051

Journal of Animal Environmental Science ISSN:1226-0274(Print) 축산시설환경학회지

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