This paper focuses on the by-product utilization of supercritical water gasification (SGWG) with chicken manure suspended an activated carbon as a catalyst. In the material recovery as a by-product utilization, hydroxyapatite and ammonium sulfate were obtained from solid phase and liquid phase of the SCWG residue, respectively. An economic evaluation was implemented for methods of these materials recovery, and then the process was selected for the system design. We proposed here an economic improvement system of the SCWG with chicken manure.
