Simple  |  Affordable  |  Safe

    PONDUS™ Thermo-Chemical Hydrolysis Process (TCHP)

    What is PONDUS Thermo-Chemical Hydrolysis Process (TCHP)?

    PONDUS, an alkaline process, utilizes low grade heat (160 °F to 180 °F) and sodium hydroxide for sludge hydrolysis. A typical PONDUS system consists of a hydrolysis reactor, hot water heat exchanger, chemical dosing station, pumps, instrumentation and controls. PONDUS reduces sludge viscosity, enhances biogas production and improves sludge dewaterability.

    Awards Won:

    • 2019 Frost & Sullivan Product Leadership Award for the North American Sludge Treatment
    • 2018 Utility of the Future Today Recognition Program for the Kenosha WWTP Optimization Project
    • 2017 W&WD Top Project for the Kenosha WWTP Optimization Project
    • 2017 ACEC Grand Award Winner for the Kenosha WWTP Optimization Project

    PONDUS Step-By-Step

    [1] Thickened WAS is mixed with a small dose of [2] caustic soda (1.75 l/m3).
    [3] Sludge is heated in a loop through a high-efficiency heat exchanger.
    [4] Sludge is fed into PONDUS and goes through hydrolysis. The sludge is heated with 140 °F to 160 °F water from a Combined Heat and Power (CHP) unit or boiler. Retention time may differ in reactor zones due to varying sludge properties. The reactor operates under atmospheric pressure and is connected to the atmosphere or bio-filter. After the hydrolysis process, sludge leaves the reactor close to a neutral pH level and the remaining thermal energy can be used in the anaerobic digester [7].
    [5] Thickened primary sludge and hydrolyzed sludge is mixed to achieve an ideal mesophilic temperature of the combined sludge and then pumped into the digester [7]. If needed, additional heat can be brought into the digester through a [6] heat exchanger.

    The PONDUS Difference

    • No heat exchangers needed to cool sludge after hydrolysis to maintain an optimum digester temperature
    • No pressure vessel required
      • Safer operation
      • Specialized steam operator is not necessary
      • Reduces operating and energy costs
    • Combination of caustic soda (NaOH) and heated water, 140 °F to 160 °F, break down the cell walls
    • Minimal equipment needed: high-efficiency heat exchanger, progressive cavity pumps and a reactor operating under at atmospheric pressure

    PONDUS is Simple to Operate

    PONDUS is designed to utilize low grade heat (from hot water), rather than steam, as a heat source for sludge hydrolysis. A Certified Steam Boiler License is not required to operate the system. PONDUS’ design allows it operate the atmospheric pressure without involving a pressurized vessel. Maintaining  PONDUS is easy. Typical maintenance includes: pump maintenance, heat exchanger cleaning, and sodium hydrolyzed refilling.

    PONDUS is a Cost-Effective Choice

    • Simple operation requires little day-to-day plant supervision
    • Fully automatic process runs 24/7 year-round
    • 99% uptime; minimal estimated downtime for maintenance and repairs
    • Designed using standard industrial control system equipment
    • Compact; small footprint solution for all sized plants

    THE BENEFITS

    PONDUS Optimizes Your Sludge Treatment Process

    Icon-CNP-Water-Drop
    Reduce Viscosity of Thickened WAS up to 80%
    Icon-CNP-Digester
    Reduce Anaerobic Digestion Volume up to 50%
    Icon-CNP-Disposal
    Reduce Biosolids Disposal Costs up to 30%
    Icon-CNP-Biogas
    Increase Biogas Production up to 30%
    Icon-CNP-Polymer
    Reduce Polymer Consumption at Dewatering up to 20%
    Icon-CNP-Digester-Foam
    Reduce Digester Foaming
     
    Available Literature

    Process

    PONDUS

    Download

    Company

    Resource Intensification

    Download

    Bio

    CNP Company Backgrounder

    Download

    Case Study

    Kenosha Optimization

    Download

    Reprint

    Best Practices Award

    Download

    Reprint

    Recovering the Resources

    Download

    Reprint

    Breaking New Ground

    Download

    Reprint

    Energy Conservation

    Download

    Reprint

    Biosolids Boss

    Download