The near shore areas face with limit of the cleanup movement as the result of the constant increase of the offshore development demand and the marine pollutant loads and the red tide phenomenon has done serious damage. The land also suffers from the water supplies to be stopped up the filter as the result of green tide phenomenon because of the pollutant in the rivers and the lakes. It is serious to the problem to the death from suffocation of the fishes and the shellfishes as the result of the oxygen dries in the rivers and the lakes. Therefore, it needs the means of solution to resolve the above problems.

  Now, Korean government tries to minimize damage to use the method such as the farm edge of dip, movement, the loess sprinkling and the emergency shipment in case of the red tide in the domestic sea area. Despite these method, it is serious damaged every year. (An annum average 180 hundred million won)

  There are the disposal methods in the rivers and the lakes such as the copper sulfate sprinkling and the poor-grade soil dredging, but it has the defect like the temporary effect and the high - cost.

  Therefore, PLUS INTERNATIONAL CO., LTD ENGINEERING RESEARCH INSTITUTE has developed the algae (red tide and green tide) disposal system with the low-cost.