This study evaluated the feasibility of recovering and recycling nitrogen (N) and phosphorus (P) from livestock excreta as struvite (MgNH4PO4·6H2O) in South Korea. Our experimental results showed that struvite precipitation was a very effective way to recover N and P from livestock excreta. Moreover, our study demonstrated that struvite precipitates from livestock excreta (SPL) contain higher concentrations of N, P, and magnesium (Mg) as compared to compost and liquid manure from livestock excreta. In addition, although SPL contain high concentrations of copper (Cu) and zinc (Zn), they meet the fertilizer criteria for concentrations of heavy metals. In South Korea, SPL cannot currently be used as a fertilizer due to legal constraints. Legal permission for SPL use would offer greater choice in livestock excreta management. In conclusion, recovery and recycling of N and P from livestock excreta as struvite can be an effective tool for managing nutrients in livestock excreta.

Abstract
 1. 서 론
 2. 재료 및 방법
  2.1. 축산폐수로부터 struvite 침전물 회수
  2.2. 분석 방법
 3. 결과 및 고찰
  3.1. 축산폐수로부터 struvite 형태로 질소 (N) 및 인(P) 회수율 분석
  3.2. 축산폐수로부터 회수한 struvite 침전물의 영양염류분석을 통한 비료로서의 타당성 검토
  3.3. 축산폐수로부터 회수한 struvite 내의 중금속 분석
  3.4. 가축분뇨로부터 회수한 struvite의 경제성 평가
  3.5. 가축분뇨로부터 회수한 struvite의 자원화를 위해해결해야 할 과제
 4. 결 론
 REFERENCES

• 류홍덕(국립환경과학원) | Hong-Duck Ryu (Watershed and Total Load Management Division, National Institute of Environmental Research)
• 안기홍(국립환경과학원) | Ki Hong Ahn (Watershed and Total Load Management Division, National Institute of Environmental Research)
• 정유진(국립환경과학원) | Eu Gene Chung (Watershed and Total Load Management Division, National Institute of Environmental Research) Corresponding author
• 김용석(국립환경과학원) | Yongseok Kim (Watershed and Total Load Management Division, National Institute of Environmental Research)
• 류덕희(국립환경과학원) | Doughee Rhew (Watershed and Total Load Management Division, National Institute of Environmental Research)