J.of Soc of Agri Struc, Japan.
Vol.30,No.1 June 1999,69-76
Original:
Language: Japanese

    In order to measure the volume of ammonia emitted in swine house, the authers evaluated the factors that relate to the emission of ammonia from swine manure. The value of ammonia emitted from swine manure is estimated by the following equation:

        m_a = a_Da.C_A.(P_a/(R_a.T))
            m_a : the volume of emitted ammonia (kg/m².h)
            a_Da : the mass transfer coefficients of ammonia in swine manure(m/h)
            C_A : the emission rate of ammonia in swine manure
            P_a I. the saturate:I vapor pressure of ammonia (kg/m³)
            R_a : the gas constant of ammonia (m/K)
            T : absolute temperature(K)

    The authors evaluated mass transfer coefficient of swine manure. A replica of swine manure was made by naphthalene and set up an experimental equation for mass transfer, as a result, the mass transfer coefficient of ammonia in swine manure was within the following range:

        a_Da = 91 -- 99 u^O.78 (u: air velocity m/s)

Keywords: swine manure, ammonia, naphthalene model, mass transfer coefficient

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