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J Korean Soc Environ Eng > Volume 41(9); 2019 > Article
J Korean Soc Environ Eng 2019;41(9): 501-513. doi: https://doi.org/10.4491/KSEE.2019.41.9.501
순환식 수경재배를 위한 수처리 기술
이승윤1,2, 김유창2
1경북대학교 건설방재공학부
2한국기계연구원 환경시스템연구본부
Water Treatment for Closed Hydroponic Systems
Sungyun Lee1,2, Yu Chang Kim2
1School of Disaster Prevention and Environmental Engineering, Kyungpook National University
2Environmental System Research Division, Korea Institute of Machinery & Materials
Corresponding author  Sungyun Lee ,Tel: 054-530-1446, Fax: 054-530-1449, Email: sungyunlee@knu.ac.kr
Received: March 19, 2019;  Revised: September 6, 2019;  Accepted: September 8, 2019.  Published online: September 30, 2019.
ABSTRACT
Hydroponics is a cultivation technology of growing plants in nutrient solutions without soil. Hydroponic cultivation has the advantages of high yield per unit area and high quality crop production, however, there is a problem that the waste hydroponic nutrient solution can cause eutrophication when discharged into aquatic systems. In hydroponic cultivation, generally 30% of the nutrient solution is drained. By introducing closed hydroponic water treatment system, it is possible to prevent environmental pollution and reduce the cost of fertilizer and water resources. To reuse the nutrient solution, the plant pathogenic bacteria must be sterilized, while the nutrients contained in the waste hydroponic solution must be preserved. In the Netherlands and Europe, where hydroponic cultivation is developed, the distribution rate of the closed hydroponic system is more than 95%, but is less than 5% in Korea. In order to prepare for environmental regulations related to discharge of hydroponic solutions and to increase the distribution rate of closed the hydroponic system in Korea, it is necessary to develop Korean-type nutrient solution treatment technology. This review provides the characteristics and examples of the physical and chemical water treatment processes for closed hydroponic system so far and analyzed the current technology status of commercial closed hydroponic water treatment system. In addition, we suggest the development direction of closed hydroponic water treatment technology suitable for korean hydroponic characteristics.
Key Words: Closed Hydroponic Cultivation System, Hydroponic Solution, Water Treatment, Plant Pathogen, Sterilization
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