In general, these devices produce a solid with about 70 percent to 80 percent moisture. Solids with less than 15 percent dry matter weep moisture that must be collected and handled. Frequently, solids recycled as feed are stored in a silo for a short time. Usually, the bulk of the separated solids consists of non-digestible fiber that has little feed value, unless wasted feed includes a portion of the solids. A holding tank equipped with a pump and agitator may be a necessary component in a flushing system to allow feeding a reasonably sized mechanical separator at a slower rate than the flushing operation.
Screens There are several screening methods.
Usually, the screen is formed with wedge-shaped bars spaced from 0.02 inches to 0.06 inches apart. The liquid passes through the screen and is drained away. The solids move down the face of the screen and drop into the storage area or a conveyor. It may be necessary to install a wash-down system to follow use to prevent solids from drying and plugging the screen. A stationary inclined screen for liquid and solid waste separation.