Waste derived from human activitirs, such as rapeseed placentiform from the extraction of rape oil;fruit faeces from the extraction of fruit juice;chicken excrement from the scall farming of chickens.

摘要废弃类为满足自身需要的产，如菜籽饼来自于菜籽，渣来自于水汁，鸡粪来自于规模化养鸡。