Byosis – ByoFlex® Ammonia Stripping Process

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Byosis – ByoFlex® Ammonia Stripping Process

Remove ammonia from digestate with ByoFlex

About the Company:

Byosis combines and translates her extended knowledge with digestion and fermentation processes into practical and feasible solutions. Whether the input material are crops, agricultural residues, industrial waste, green waste or sludge from waste water treatment facilities, Byosis offers solutions that improve the efficiency and capacity of the digestion process considerably.

Biobased Solutions

The solutions of Byosis are an add-on to a classic digester and aim at 2 tracks in general: improving the biogas production from feedstock and lowering the operational costs of handling the digestate. In that way the technical and financial performance is improved and the business case becomes more robust. At the same time our solutions help to reduce the ecological footprint of a biogas process. Byosis supports customers by bringing innovative, biobased solutions and offers proprietary, advanced technology and sound operational knowledge.

Modular set-up

The systems of Byosis are set up in a modular mode, e.g. container and/or skid mounted. In this way they can easily be incorporated into existing or new biogas facilities. The ByoLogic system speeds up and improves the digesting process. The ByoFlex system combines the advantages of a quicker biogas production rate with the separation of minerals from watery streams, such as digestate, manure and wastewater. The resulting products can be sold or used as a substitute for artificial fertilizers.

With the unique ByoSense system it is possible to separate the proteins and starches from the feedstock in cascade before the digester. The lignocellulosic feedstock is than converted into biogas, whereas the proteins can be sold as a high valued animal feed and the starches are fermented into ethanol. The system thus delivers 3 valuable products from biomass that also represent 3x times the economic value and offers a solution to deal with limited and expensive resources.

About the Solution:

Remove ammonia from digestate with ByoFlex, our standard system for stripping of ammonia from manure, digestate or heavily polluted wastewater. Byosis removes ammonia from manure, digestate and heavily polluted industrially wasted water with the innovative ByoFlex-system. With ByoFlex it’s possible to remove up to 80% of the ammoniumnitrogen. The nitrogen will be recovered in the form of ammonium sulfate.

End-of-pipe of recycle?

ByoFlex is usable in 2 ways: ‘end-of-pipe’ and ‘recycle’. By putting ByoFlex in a “end-of-pipe” setup, nitrogen will be removed and less acres are needed for spreading out the digestate or the costs for a biological purify process will be reduced significantly. By circulating the digestate through a ByoFlex unit (recycling) is it possible to reduce the level of ammonium in the digester. This allows nitrogen-rich streams, such as chicken manure and waste streams to be enriched, without the addition of water. This can provide a large saving in feedstock costs.

ByoFlex is a robust and modular system which can be expanded with a pasteurization-unit. It can also be combined with a decanter, dryer or evaporator so complete solution can be created for treating manure or digestate. The modular design allows a rapid erection time on site. The built-in advanced automated control system allows for remote monitoring, service, data-logging and process optimization.

What are the advantages?

  • The modular unit comes in three sizes
  • Use waste heat for heat bonus
  • Low heat and energy demand
  • Compact design
  • Reducing the feedstock costs of a digester
  • Less nitrogen in manure, digestate and waste water
  • Nitrogen-rich fertilizer
  • Easy to operate

Byosis The Green East Drosteweg 8 , 8101 NB Raalte The Netherlands 31 851 30 23 82 Visit Company Website

Solution Type

  • Ammonia Stripping


  • Equipment Vendor


  • Concentrated Nutrients


  • Nitrogen
  • Odor
  • Pathogens

To view additional information about this vendor, click below.

Solution Strengths, Weaknesses and Critical Indicators

Ammonia-N can be harvested from manure and digestate using proven chemical/thermal processes:

  • Produces a concentrated source of nitrogen from a renewable source
  • Requires pre-treatment to remove coarse and fine solids
  • Pairs well with anaerobic digesters because digesters convert organic N into ammonium
  • Chemical storage required for process chemicals and final product
  •  Proven technology for nitrogen recovery, odor control, and pathogen reduction

Newtrient Comments/Opinions:

Ammonia-N can be harvested from manure using proven chemical/thermal processes.

  • Produces a concentrated source of nitrogen from a renewable source
  • Requires pre-treatment to remove coarse and fine solids
  • Pairs well with anaerobic digesters because digesters make more ammonia available
  • Chemical storage required for process chemicals and final product
  The Byosis Process has not been evaluated using Newtrient's 9-point scoring process because, although their process appears to be suited for use on dairy manure, Newtrient is not aware of any current dairy based projects in North America.

Newtrient 9-Point Scoring Rating

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