Effect on influent of wastewater treatment plant in consideration of the emission factor of disposer wastewater and water quality variation in the sewer

Abstract

 The recycling systemof kitchen waste byusing the direct discharge disposer, maycontribute to the creation of a recycling society, but the spread is not promoting with the exception of some areas because the effect on the sewage facilities is a concern in Japan. In this study, we investigated the features of the disposer wastewater by water sampling in Isesaki city where direct discharge disposer has been introduced, and we calculated the emission factor. As a result, the emission factor of disposer wastewater was suggested SS is increased to about 4 times as compared to the kitchen wastewater do not use the disposer. In addition, an experiment assuming water quality changes in the sewer, we examined the effect of the influent wastewater of wastewater treatment plant with the emission factor. Effect of disposer wastewater is small at present, but if the disposer user has increased to about 25% of the population, we except SS will approximate to the design wastewater influent quality of wastewater treatment plant.