About OTAKE HISAO
About 大阪大 大学院工学研究科
About 月刊資源環境対策
About resource
About society
About recycling
About deficiency
About Sewage
About phosphate rock
About useful material recovery
About phosphorus
About recycle-based society
About utilization
About reuse
About phosphorus recovery
About リン資源
About resource drying up
About Recycling of resources
About 循環型社会
About リン資源
About リサイクル
About 動向
About 状況