A STUDY ON TREATMENT OF HUMAN WASTE CAUSED BY GREAT EARTHQUAKE DISASTER - A CASE STUDY FOR NANKAI TROUGH EARTHQUAKE -

Abstract

 The Great East Japan Earthquake has affected many human waste treatment plants causing serious problems in the treatment of night soil and sludge. Therefore, it is necessary to consider the way of wide-area support for Nankai Trough earthquake that may be caused extensive damage. However, the possibility of wide area support in such a situation has not been studied so far. In this study, Wakayama Prefecture was considered as a target area, and quantitative and qualitative changes in human waste and sludge after the earthquake, and the necessity of wide area treatment corresponding to the situation were examined. The amount of human waste and sludge discharged during the period until 120 days after the disaster was examined. As a result, it was clear that it cannot be treated only by the facilities in the prefecture and support from the Kinki area in a wider area is needed. It was also made clear that there is a period in which 70% or more consumption of the margin of treatment are required and that there is a need for coordination with support for other damaged areas.