Total behavior of sewage sludge in supercritical water

Abstract

Hydrothermal treatment is a promising option for wet organic waste, due to its low energy consumption. Hydrothermal treatment can also be used as resource recovery method. When considering the recovery of phosphorus from sewage sludge by hydrothermal reaction, organic phosphorus is mineralized and get precipitated, while the carbon content is gasified and recovered from other part. We report the process of efficiently recovering phosphorus based on the experimental runs in the range of 375 to 600 ℃ under 25 MPa.