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The Demand Analysis of Water Purification of Groundwater for the Horticultural Water Supply

시설원예 용수 공급을 위한 지하수 정수 요구도 분석

  • Lee, Taeseok (Division of Energy & Environmental Engineering, NIAS, RDA) ;
  • Son, Jinkwan (Division of Energy & Environmental Engineering, NIAS, RDA) ;
  • Jin, Yujeong (Division of Energy & Environmental Engineering, NIAS, RDA) ;
  • Lee, Donggwan (Division of Energy & Environmental Engineering, NIAS, RDA) ;
  • Jang, Jaekyung (Division of Energy & Environmental Engineering, NIAS, RDA) ;
  • Paek, Yee (Division of Energy & Environmental Engineering, NIAS, RDA) ;
  • Lim, Ryugap (Division of Energy & Environmental Engineering, NIAS, RDA)
  • 이태석 (농촌진흥청 국립농업과학원 농업공학부 에너지환경공학과) ;
  • 손진관 (농촌진흥청 국립농업과학원 농업공학부 에너지환경공학과) ;
  • 진유정 (농촌진흥청 국립농업과학원 농업공학부 에너지환경공학과) ;
  • 이동관 (농촌진흥청 국립농업과학원 농업공학부 에너지환경공학과) ;
  • 장재경 (농촌진흥청 국립농업과학원 농업공학부 에너지환경공학과) ;
  • 백이 (농촌진흥청 국립농업과학원 농업공학부 에너지환경공학과) ;
  • 임류갑 (농촌진흥청 국립농업과학원 농업공학부 에너지환경공학과)
  • Received : 2020.09.28
  • Accepted : 2020.12.04
  • Published : 2020.12.31
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Abstract

This study analyzed groundwater quality in hydroponic cultivation facilities. Through this study, the possibility of groundwater use was evaluated according to the quality of the groundwater for hydroponic cultivation facilities. Good groundwater quality, on average, is pH 6.61, EC 0.27 dS/m, NO3-N 7.64 mg/L, NH4+-N 0.80 mg/L, PO4-P 0.09 mg/L, K+ 6.26 mg/L, Ca2+ 18.57 mg/L, Mg2+ 4.38 mg/L, Na+ 20.85 mg/L, etc. All of these satisfy the water quality standard for raw water in nutrient cultivation. But in the case of farmers experiencing problems with groundwater quality, most of the items exceeded the water quality standard. As a result of the analysis, it was judged that purifying groundwater of unsuitable quality for crop cultivation, and using it as raw water, was effective in terms of water quality and soil purification. If an agricultural water purification system is constructed based on the results of this study, it is judged that the design will be easy because the items to be treated can be estimated. If a purification system is established, it can use groundwater directly in the facility and for horticulture. These study results will be available for use in sustainable agriculture and environments.

본 연구에서는 시설원예 농가 중 지하수 수질에 문제가 있는 농가와 지하수를 원활히 사용하는 농가의 수질 성분을 분석하고 비교하였다. 이를 통해, 국내 수경재배 시설을 대상으로 지하수 수질에 따라 양액 재배용 원수로 사용 가능성을 평가하였다. 지하수 수질에 문제가 없는 농가의 지하수는 평균적으로 pH 6.61, EC 0.27 dS/m, NO3-N 7.64 mg/L, NH4+-N 0.80 mg/L, PO4-P 0.09 mg/L, K+ 6.26 mg/L, Ca2+ 18.57 mg/L, Mg2+ 4.38 mg/L, Na+ 20.85 mg/L, Cl- 18.10 mg/L, S2- 7.97 mg/L, HCO3- 55.06 mg/L, Fe 0.09 mg/L, Mn 0.01 mg/L, Zn 0.04 mg/L, Cu 0.01 mg/L, B 0.04 mg/L, Si4+ 8.93 mg/L, Mo 0.01 mg/L로 나타났으며, 모두 양액 재배용 원수의 수질기준을 만족하였다. 반면, 지하수 수질에 문제가 있는 농가의 경우 대다수의 항목이 양액재배용 원수의 수질기준을 초과하였다. 이러한 성분분석 결과로 보아 작물재배에 적합하지 않은 수질의 지하수를 정수하여 원수로 사용하는 것은 지하수의 재충전, 토양정화 측면에서 효과가 있다고 판단된다. 본 연구결과를 바탕으로 농업용 정수시스템을 구성한다면 우선처리 대상 항목 및 연계 항목을 추측할 수 있어 설계가 용이할 것으로 판단된다. 또한 이러한 농업용 정수시스템을 정착시킨다면 시설원예 단지에서 직접 지하수를 사용하면서 재충전 및 재이용할 수 있고, 결과적으로 지속가능한 농업과 국토 정화에 이바지 할 수 있는 기본 정보를 제공한다.

Keywords

Acknowledgement

본 연구는 2020년도 농촌진흥청 국립농업과학원 연구개발사업(과제번호: PJ014911)의 지원에 의해 이루어진 것임.

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