Abstract: Disclosed is a proppant storage system that includes a bladder having a fill inlet configured to receive proppant into the bladder, a fill outlet configured to expel proppant from the bladder, and an air outlet configured to expel air from the bladder. A dust filter operably attached to the air outlet configured to filter air expelled from the air outlet is disclosed. Further disclosed is a valve attached to the fill outlet configured to regulate the flow of proppant expelled from the bladder. A frame is disclosed supporting the bladder. A method of processing proppant is further disclosed.