Abstract
Phosphorus resources are finite resources, and there is an opinion that the excellent phosphorus are which are used now shall be entirely exhausted in near future. On the other hand, phosphorus is a material considered to be a cause of the eutrophication of the closed water area. Therefore, the recycling of phosphorus resources is the important measure for resource and environmental protection.
At first, we examined about the problems of phosphorus income and expenditure of Japan, and about how much potential volume of phosphorus can be reused under the recent technology. Next we researched how much phosphorus can be reused by current wastewater treatment technology, and about whether phosphorus recycling can be carried out without global warming damage.
