Abstract
Phosphorus is known as one of three major elements of fertilizer, essential substance on conducting agriculture, and resource which is concerned about the depletion in the future. Thus, it is important to establish the phosphorus recycling system. Sewage sludge is considered as one of the main resource for realization of this system. Now, there are many ways to collect phosphorus from sewage sludge such as HAP method, MAP method, and partial reducing melting method. Hydrothermal treatment of sewage sludge to collect inorganic phosphorus was also studied in previous study. However, research which focuses on gasification characteristic of organophosphorus compounds under hydrothermal condition has not been reported yet, which is the purpose of this study. To confirm gasification characteristics, we used adenosine triphosphate (ATP) disodium salt hydrate as a first feedstock. It was treated under hydrothermal condition of 25 MPa. As a result, about 50 % of carbon gasification efficiency could be confirmed after 40 s of hydrothermal treatment at 400 ℃. Main component of the product gas was carbon monoxide.
