France Evaporation – Nutrient Recovery

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France Evaporation – Nutrient Recovery

PWL-Series DAF Systems

About the Company:

With over 20 years of experience and 100 facilities, France Evaporation designs, tests and builds key industrial facilities for evaporation, crystallisation and distillation for the food, pharmaceutical and chemical industries as well as the mining sectors and water and waste treatment.

About the Solution:

Treatment of Anaerobic Digester digestates:

  • Falling film and forced circulation evaporators
  • Ammonia stripping
  • Production of ammonium sulphate
  • Mechanical Vapor Compression operation (evaporator and stripping)
  • Valorization of thermal energy of engines (90°C)

  • France Evaporation , France 33-03-2000-1750 Visit Company Website

    Solution Type

    • Chemical Flocculation


    • Equipment Vendor


    • Concentrated Nutrients


    • GHG
    • Nitrogen
    • Odor
    • Phosphorous
    • Storage

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    Solution Strengths, Weaknesses and Critical Indicators

    Chemical flocculation technologies remove the non-dissolved particles from the waste stream typically resulting in irrigation quality “tea water”:

    • Produces a clay like cake which is high in phosphorus and with significant amounts of organic nitrogen.
    • Supported technologies include belt presses, centrifuges, dissolved air flotation systems and others; all requiring flocculants to achieve high rates of solids removal
    • There is significant variation of chemical and energy use depending on site and by technology
    • There is significant variation of operational intensity depending on site and by technology
    • There is significant variation of cost depending on site and by technology
    • Proven technology for nitrogen recovery, phosphorous recovery, storage reduction, GHG reduction, and odor control

    Newtrient Comments/Opinions:

    Evaporation and Drying Technologies:

    • Uses heat to produce either manure with less water or dried manure solids
    • Systems that reduce water in manure use a series of evaporators to sequentially evaporate water from liquid slurries—energy is supplied either by purchased fuel and/or waste heat from other processes
    • Systems that dry separated solids use either a belt or drum to evaporate water from separated solids—energy is supplied either by purchased fuel, electricity and/or waste heat from other processes
    • Chemicals are released with the water (i.e. ammonia, hydrogen sulfide), and this often requires additional treatment such as condensation of the water and/or scrubbing of the chemicals
    • The requirement for purchased energy and costs are a significant concern leading to a tradeoff between input costs and gains in liquid concentration and transportation/market of by-products
    France Evaporation has been unresponsive to Newtrient's multiple attempts to supplement or validate the information about this technology.

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