Post-Digestion P-Recovery

    MagPrex™

    "We've dissolved the partnership with our Germany-based partner to build on the strength of our U.S.-based initiatives and learnings. Changing our nutrient recovery technology's name to MagPrex (previously AirPrex) signifies our commitment to continued innovation and ensures the best efficacy and the best value for all of our North American customers." – Gerhard Forstner, president of CNP

    THE PROBLEM

    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-Flow-Diagram-wLabels

    THE SOLUTION

    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.
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    THE BENEFITS

    MagPrex Removes Struvite while Significantly Improving Treatment Efficiency

    Icon-CNP-Polymer
    Reduce Polymer Consumption up to 30%
    Icon-CNP-Disposal
    Reduce Disposal Costs up to 20%
    Icon-CNP-Phosphate
    Reduce Phosphate Recycle Load up to 90%
    Icon-CNP-Maintenance
    Reduce Maintenance Costs up to 50%
    Icon-CNP-Struvite
    Increase Revenue from Fertilizer up to 20%
    Icon-CNP-Sodium-Hydroxide
    No Sodium Hydroxide Required
     
    Available Literature

    Process

    MagPrex

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    Process

    MagPrex Installations

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    Company

    Advanced Biosolids Treatment

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    Bio

    Centrisys/CNP Company Backgrounder

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    Reprint

    Struvite Solution

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    Reprint

    Nutrient Award

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