Mass Transfer Coefficient of Ammonia in Liquid Swine Manure and Aqueous Solutions

✍ Scribed by J. Arogo; R.H. Zhang; G.L. Riskowski; L.L. Christianson; D.L. Day

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 204 KB
• Volume: 73
• Category: Article
• ISSN: 0021-8634
• DOI: 10.1006/jaer.1998.0390

✦ Synopsis

Correlations for the overall mass transfer coe$cient of ammonia with liquid properties and environmental conditions were developed for ammonia volatilizing from aqueous solutions as well as from liquid manure in a convective emission chamber where the air velocity, temperature, turbulence, and relative humidity were precisely controlled.

The mass transfer coe$cient was observed to increase with increasing air velocity and liquid temperature but decreased with increasing air temperature. Analysis of air-liquid temperature combinations on the in#uence of mass transfer coe$cient using the correlation equations showed that a lower air temperature (153C) and higher liquid temperature (353C) combination is more likely to result in higher ammonia volatilization rates compared to other temperature combinations. On the other hand, a higher air temperature (353C) and lower liquid temperature (153C) combination would result in lower ammonia volatilization rates for di!erent air velocities.

The mass transfer coe$cient for ammonia was muchmore sensitive to changes in air velocity at lower compared to higher velocity ranges. Similar sensitivity responses were obtained for both air and liquid temperature ranges.