earticle

영어

Recently, the importance of the phosphorus management has been increased according to the enforcement regulation issued on 2 April, 2010 by the Ministry of Environment, Korea. Various methods for phosphorus removal have several problems such as high costs for sludge disposal and chemicals. The purpose of this study is to reduce the amount of sludges and cost of chemicals using crystal obtained from phosphorus crystallization in seawater reverse osmosis (SWRO) system. Crystal from pre-crystallization for multi-stage SWRO system was used as seeding substance for ortho-phosphate ions. Ca2+ is the main seeding material, and sufficient concentration could be obtained from the precrystallization step in desalination process. The result showed over 90% removal efficiency and satisfied the effluent water quality standards of 0.2mg T-P/L. Therefore, it is expected to maximize the economic efficiency not only by to use the industrial waste instead of the chemicals, but also to reduce sludge treatment cost.