Waste Water Treatment – Gravity Sludge De-Watering

Gravity de-watering is accomplished in a de-watering box.  This can be a roll off type box or a self-dumping hopper.   The box or hopper will have a perforated bottom plate.  Typically, a 100-mesh stainless steel wire screen is over the perforated plate.   A 20 mesh wire screen is also typical when a filter paper is to be used on top of the screen.  Other sizes of wire mesh screen are readily available.  The wire screen is typically held in a metal frame making it easy to remove for cleaning or replacement.    The wire screen may be enough by itself, if ... » Read More