Struvite mineral buildup leads to reduced plant capacity. In wastewater reclamation plants with Biological Phosphorus Removal (BPR), phosphorus accumulates in sludge and releases in a dissolved reactive form (orthophosphate) in an anaerobic condition. Elevated orthophosphate levels in sludge causes operational challenges, including:
Deterioration of sludge dewaterability; Elevated phosphorus load to the wastewater treatment plant due to phosphorus recirculation; Uncontrolled formation of struvite (or MAP: magnesium ammonium phosphate) inside pipes and other equipment; Reduced digester capacity by struvite build-up inside the anaerobic digester. MagPrex™ optimizes the sludge treatment process like no other system
MagPrex™ turns struvite into an opportunity for resource recovery. Struvite, when formed under a controlled environment, can be harvested and utilized as a beneficial fertilizer. MagPrex™ forms struvite by stripping out CO2, elevates the pH and adds MgCl2 to augment Mg2+. MagPrex™ installs between the anaerobic digester and the dewatering equipment. The process converts the orthophosphate into struvite crystals, which is harvested from the bottom of the reactor. MagPrex™ mitigates the unexpected consequence of dewatering Bio-P sludge.