Through response surface method( RSM),phosphorus recovery from high-speed rail fecal sewage was improved along with the chemical analysis of the harvested product. Initially,the effects of p H( 8 ~ 10),molar ratio of magnesium to phosphorus( 2 ~ 6),reaction time( 5 ~ 25 min),and reaction temperature( 5 ~ 25 ℃) among other factors on phosphors recovery efficiency were investigated. The RSM-derived findings indicate that the optimal set of operational parameters was p H 9.5,magnesium-to phosphorus-molar ratio...