Abstract
Disposal of raw garbage is one of the major problems on solid wastes in urban areas. One of the solutions is to introduce these matters into “Raw Garbage Recycling System with Comminuter and Sewer.” Clogging of sewer pipes followed by deposition of high-density substances is of critical for this system. So that, this paper discusses the possibility of deposition of high-density substancesuch as seashell and egg shell in sewer pipes. The major conclusions in this study are as follows:(1) Both seashell and egg shell which are over 2.00mm in diameter may deposit under the standard design condition; and (2) The minimum critical friction velocity for heavier 2% of them is 0.04m/s.
