How much debris will headworks screens generate?
While there is a chart to determine the amount of debris a screen will generate (chart shows cubic feet of solids per mgd based on the screen’s spacing) so many large bulky solids end up in the influent pipeline that calculating and selecting a figure is difficult. Typical sewage has a 0.5% concentration of solid material in water; however, a combined system and many sanitary sewer systems can experience surges of debris that will exceed this figure. Moreover, illegal dumping of construction debris or yard waste can also enter the headworks making it important to have smart screens and equipment that can sense and adjust to changing solids loading. Look for screen manufacturers that make “smart headworks.” These headworks systems include product logic controllers that can tell the screens to speed up, turn on more screen equipment, activate conveyors or sluices or reverse a screen or channel grinder in order to clear an obstruction. This way the equipment works harder to take care of i
