ANALYSIS OF FILTER MATERIALS FOR RECYCLING WASTE NUTRIENT SOLUTIONS IN SOILLESS CULTURE

J.E. Son, Y.K. Jung, T.I. Ahn
For environmental conservation and reuse of agricultural materials, recycling of nutrient solution is important in soilless culture. This study aims to investigate the physicochemical characteristics of some filter materials and analyze their filtration capabilities to waste nutrient solutions. For this purpose, a column filtering system was developed for filtering waste nutrient solutions. Five filter materials, such as zeolite (0.5~1 mm), sand (0.45~0.7 mm), diatomite (1~2 mm), two types of expanded perlite (0.5~1 mm, >0.5 mm), were used. Bulk density, hydraulic conductivity, and chemical (EC, K+, Ca2+, Na+, Mg2+, NH4+ and CEC) characteristics of each filter material were measured. Filtration capability was measured and calculated with salt concentration and contents of CEC. Natural zeolite showed higher filtration capability than any other materials, while expanded perlite and sand showed lower filtration capabilities. Among three treatments of hydraulic pressures (5, 10 and 15 mm), the filtration capability was higher in 5 mm than those in 10 and 15 mm. The filtration capability increased with decrease of hydraulic pressure and with increase of CEC.
Son, J.E., Jung, Y.K. and Ahn, T.I. (2011). ANALYSIS OF FILTER MATERIALS FOR RECYCLING WASTE NUTRIENT SOLUTIONS IN SOILLESS CULTURE. Acta Hortic. 893, 1099-1102
DOI: 10.17660/ActaHortic.2011.893.125
https://doi.org/10.17660/ActaHortic.2011.893.125
CEC, column filtering system, filtration, hydraulic coefficient, micro-porous structure
English

Acta Horticulturae