Abstract
Recently, the increase of quantity of refuse and the present conveying system with garbage trucks have caused various problems in urban areas. Refuse which is taken out of buildings on streets causes the appearance of noxious insects and birds and allows to be devastated by vagrants. Sometimes, refuse is collected after stores are open and trash heaps on streets spoil a fine view of the streets, moreover, collecting of refuse by garbage trucks causes traffic jams. In this study, it is cleared that refuse conveying system with pipe-line is necessary in commercial areas from the following three points of view : (1) Clarification of quantity of refuse in commercial areas and in commercial facilities. (2) Clarification of operation of refuse pipe-line conveying system. (3) Clarification of opinion view about introducing of refuse pipe-line conveying system. In the first place, to see the quantity of refuse in commercial areas and in commercial facilities : (1) Density of refuse discharge in commercial areas is about 3-7 times as large as that in residential areas. (2) Quantity of refuse in commercial facilities defers from store to store ・・・ restaurant, bar, shop, etc. In the next place, to see about the actual operation of refuse pipe-line conveying system : (1) Up to the present, this systems has been introduced in residential areas and density of refuse discharge in these areas is less than 1 t/ha. (2) Electric power needed for conveying 1 t of refuse tends to decrease when the amount of refuse increases. Lastly, in Ginza, more than 70 % of people are for introducing of refuse pipe-line conveying system. In urban districts, the number of inhabitants tend to decrease year by year and they are obliged to suffer from the garbage dumped by the people who work there in the day time. In short, most of the refuse problems in commercial areas are caused by the present conveying system with garbage trucks, and the density of refuse discharge in commercial areas is higher than that in residential areas where the pipe-line system has already been introduced. Therefore, it is necessary to introduce refuse pipe-line conveying system in commercial areas.
