1994 Volume 31 Pages 1-10
Settling is one of fundamental processes of water treatment, but it needs comparatively large space to install a settling tank. Therefore, it is difficult for some small scale factories to find enough space in their premises to install one. Some experiments were made with some small model settling tanks in which plastic fiber strings with many small loops were stretched covering full cross section perpendicularly to the horizontal flow arranged with some intervals to increase the efficiency of suspended solids removal. It is shown in this paper that the fiber strings in a settling tank improved removal efficiency by preventing short circuit flows, and obstructing suspended solids to pass through the fiber net or adhering them on it.
