A STUDY ON THE INFLUENCES OF GARBAGE GRINDER INTRODUCTION CONSIDERING WITH PURIFICATION IN SEWER PIPES

Abstract

 Maintaining the quantity and quality of public services will be becoming the big issues in Japan, where the population is declining. The situation is similar in the sewage and waste disposal fields, and measures should be suitably carried out. The introduction of garbage grinders can be expected to increase the efficiency of waste disposal by reducing combustible waste and increasing heat value. On the other hand, the garbage thrown into the sewage system may cause adverse effects due to an increase in water quality load on sewage treatment. This study numerically predicted the change of water quality load reaching the sewage treatment plant based on data from the model experiment for the research of water quality change loaded by discharged garbage in sewer pipeline. GHG emission from sewage treatment and combustible waste treatment were examined by reflecting the water quality predicts. As the result, it was made clear that the reduction by combustible waste was greater than the increase in the sewage treatment by DP discharge, and the introduction of garbage grinder would be contributed to the reduction of GHG emissions.