SYMBOL DEFINITIONS, UNITS

KL

Overall mass-transfer coefficient of ammonia, cm/h

KH

Henry’s coefficient, dimensionless

Mass-transfer coefficient of ammonia in liquid phase, cm/h

Mass-transfer coefficient of ammonia in gas phase, cm/h

Mass-transfer coefficient of oxygen in liquid phase, cm/h

Mass-transfer coefficient of water in gas phase, cm/h

u8

Wind speed at 8-m height, m/s

uz

Wind speed at an anemometer height z, m/s

z0

Roughness height, m

P

Atmospheric pressure, atm

NH3 diffusion coefficient in air, m2/s

H2O diffusion coefficient in air, m2/s

O2 diffusion coefficient in water, m2/s

NH3 diffusion coefficient in water, m2/s

Mair

Molecular weight of air (average), g/mol (29)

Molecular weight of NH3, g/mol (17)

Molecular weight of H2O, g/mol (18)

v)air

Air molecular diffusion volume, 20.1 cm3/mol

NH3 molecular diffusion volume, 14.9 cm3/mol

Ta

Air temperature, K, mg/l

[TAN] k

Total ammoniacal concentration at the manure surface on the kth day of storage

Taq

Water (manure) temperature, K



The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement