The annual total phosphorus load caused by public wastewater, nightsoil and livestock manure treatment facilities in Korea has been examined macroscopically. Annual domestic average phosphorus (P) inflows through the income of phosphate rock for the last five years (2012 - 2016) were analyzed as 76,598 tons/year. As of the year 2015, the total loadings of phosphorus attributed to public wastewater treatment facilities, nightsoil treatment facilities and livestock wastewater were estimated as 30,269 tons/year, 1,909 tons/year and 18,138 tons/year, respectively. Considering the amount of phosphorus imports, the annual phosphorus load from wastewater, livestock wastewater and excretions is equivalent to 39.5%, 23.7%, 2.5% and totally 65.7%(39.5% + 23.7% + 2.5%). Therefore, the introduction of phosphorus recovery and recycling processes for the public wastewater and livestock manure treatment facilities has been found to be effective because it could reduce the import amount of phosphate rock by up to 60% or more.

ABSTRACT
 1. 서 론
 2. 연구방법
  2.1 연도별 인(P) 부하량 산정 방안
  2.2 발생원별 인(P) 회수가능량 산정 방안
 3. 결과 및 고찰
  3.1 인광석 수입에 따른 인(P) 유입량 산정
  3.2 공공하수처리시설의 인(P) 유입부하량 산정
  3.3 분뇨처리시설의 인(P) 유입부하량 산정
  3.4 축산폐수에 기인하는 인(P) 유입부하량 산정
  3.5 발생원별 인(P) 회수가능량 산정
  3.6 외국의 인(P) 회수･자원화 정책 및 인광석 수입대체가능량 고찰
 4. 결 론
 References

• 김원재(한국건설기술연구원 국토보전연구본부) | Weonjae Kim (Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology,) Corresponding author