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  • Title: An economic evaluation of freeze-dried kefir starter culture production using whey.
    Author: Kourkoutas Y, Sipsas V, Papavasiliou G, Koutinas AA.
    Journal: J Dairy Sci; 2007 May; 90(5):2175-80. PubMed ID: 17430915.
    Abstract:
    An economic study is presented in which industrial-scale production of freeze-dried kefir starter culture is discussed based on results on a laboratory scale. Industrial scale-up was based on a 3-step process using 3 bioreactors of 100, 3,000, and 30,000 L for 300 kg of freeze-dried culture/d of plant capacity. The major cost component of the total investment was the freeze-drying machinery, which consisted of 57% of the total investment. Production cost was reduced from 15.4 euros/kg ($18.5/kg) to 2.9 euros/kg ($3.5/kg) when the production capacity was increased from 30 to 900 kg/d. An economic analysis revealed a 3.5-fold increase in production cost compared with the corresponding production cost of the wet product, with an added value of up to 10.8 x 10(9) euros ($13.0 x 10(9)) within the European Union.
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