Abstract
As a measure against decreasing eutrophication in reservoirs with shallow water depth, the reduction of phosphorus loading is one of the effective measures, and in view that, numbers of phosphorus removal facilities have been constructed and they are in operation in Japan. This paper introduces the method of utilization of sludge generated in the water treatment process for reducing phosphorus of river water by which application of the said removal facilities has been confirmed through test plant as effective and stable method, and actual plant was constructed and in operation now.
