11 Waste treatment and handling equipment, namely, membrane bioreactors, Screw presses in the nature of dewatering machines for use in separating liquids from solids, Struvite recovery systems consisting of digesters and struvite reactors for recovery of phosphorus from wastewater and sewage, chemical reactors for treatment of Biosolids, Sliding frames for discharging biosolids; Fluid bed dryers for use in wastewater treatment