Application of Membrane Technology in Agricultural Field -----Improvement of Water Quality for Horticulture----

Abstract

Rain, river, ground and tap water resources can be used for agriculture in Japan. Ground water is available in large quantities and low cost. Therefore, it is one of the main source of water for agriculture and horticulture. But in many horticultural area especially close to sea, the salt level of ground water varies widely. Sometimes it exceeds the acceptable maximum for sound plant growth. It is not economically and technically viable to mix ground water with fresh water for the purpose of reducing salt concentration. The author suggests that the membrane separation technology can be applied to control quality of ground water for agricul-ture. Information on precious studies related to the application of membrane technology in agricul-ture, and an general aspects were summarized in the beginning. Subsequently, practical exam-ples of applications of membrane method for desalination of ground water in horticultural filed in Japan. Advantages and disadvantages of application of membrane method in agricultural water quality control were also discussed.