Process modeling of ammonia volatilization from ammonium solution and manure surfaces

Felipe Montes, Alan Rotz, Hala Chaoui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Ammonia emissions occur from manure surfaces on the barn floor, during storage, and following field application. Based upon theoretical principles and associated published information on ammonia emission, relationships were refined for modeling the dissociation constant, Henry's law constant and mass transfer coefficient to better predict ammonia loss from manure surfaces. Expressions were obtained that relate these coefficients to the temperature, pH and ionic strength of the material, and the air velocity over the material. These expressions were tested by comparing predicted ammonia emission rates against values measured in controlled laboratory experiments for buffered ammonium-water solutions and dairy cattle manure. Experimental results compared well to values predicted using these theoretical expressions derived from ammonia volatilization literature. This process-based model provides a basis for developing predictive tools that better quantify management effects on ammonia emissions from farms and thus assist in the development and evaluation of strategies for reducing emissions.

Original languageEnglish (US)
Title of host publicationAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008
PublisherAmerican Society of Agricultural and Biological Engineers
Pages952-971
Number of pages20
ISBN (Print)9781605605364
StatePublished - Jan 1 2008
EventAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008 - Providence, RI, United States
Duration: Jun 29 2008Jul 2 2008

Publication series

NameAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008
Volume2

Other

OtherAmerican Society of Agricultural and Biological Engineers Annual International Meeting 2008
CountryUnited States
CityProvidence, RI
Period6/29/087/2/08

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences(all)

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  • Cite this

    Montes, F., Rotz, A., & Chaoui, H. (2008). Process modeling of ammonia volatilization from ammonium solution and manure surfaces. In American Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008 (pp. 952-971). (American Society of Agricultural and Biological Engineers Annual International Meeting 2008, ASABE 2008; Vol. 2). American Society of Agricultural and Biological Engineers.