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KMID : 1024520170260010109
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Journal of the Environmental Sciences
2017 Volume.26 No. 1 p.109 ~ p.118
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Effects of Intermittent Operation of Plasma and Electrolysis Processes on Lettuce Growth and Nutrient Solution Components
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Kim Dong-Seog
Park Young-Seek
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Abstract
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This study was conducted to investigate the effects of intermittent plasma and electrolysis treatments on lettuce (Lactuca sativa var. oak-leaf.), nutrient solution components (NO3 -N, NH4+-N, PO43--P, K+, Ca2+ and Mg2+) and environmental parameters (electrical conductivity, total dissolved solids and pH). The recirculating hydroponic cultivation system consisted of planting port, LED lamp, water reservoir and circulating pump. Nutrient solution was circulated in the following order: reservoir filtration-plasma or filtration-electrolysis planting port reservoir. The results showed that nutrient solution
components and environmental parameters were changed by plasma or electrolysis treatment. Lettuce growth was not affected by the intermittent plasma or electrolysis treatment with 30 minutes or 90 minutes, respectively. The roots of the lettuce was damaged by excessive plasma and electrolysis treatment. Electrolysis treatment had greater effect on than plasma treatment because of the accumulation of high levels of TRO (Total Residual Oxidants).
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KEYWORD
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Electrolysis, Lettuce growth, Nutrient, Plasma, Total residual oxidants (TRO)
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