Apparatus for the ammonium recovery from liquid animal manure

D.A.J. Starmans, M. Timmerman

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    1 Citation (Scopus)


    Nitrogen present in animal manure can be a limiting factor when considering manure application rates onto arable land. EU-regulations triggered the development of a new ammonia exchange apparatus for the recovery of ammonia. The described apparatus has a liquid to liquid ammonia mass transfer coefficient of 0.0058 m/s. The results were fitted using a simple first order ammonia exchange model with constant time step that additionally predicted that 80% of the ammonia could be recycled from the liquid fraction of animal manure within a residence time of 10 h with addition of 0.2 M NaOH to the manure, yielding a liquid artificial fertilizer with a calculated achievable maximum concentration of about 18 % nitrogen.
    Original languageEnglish
    Pages (from-to)761-767
    JournalApplied Engineering in Agriculture
    Issue number5
    Publication statusPublished - 2013


    • denitrification
    • nitrification
    • removal


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