FOOD SCIENCE ›› 2012, Vol. 33 ›› Issue (19): 264-268.

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Screening of Optimal Fermentation Starter and Optimization of Primary Fermentation for Yangjiang Lobster Sauce Production

  

  • Received:2011-07-28 Revised:2012-08-13 Online:2012-10-15 Published:2012-09-17

Abstract: Two dominant strains for the primary fermentation of Yangjiang lobster sauce were isolated from its koji which were identified as Aspergillus oryzae and Rhizopus oryzae respectively based on their 18S rRNA sequences and morphological features. One vigorous strain with high protease activity was picked from colonies of each of the identified strains and cultured in wheat bran medium. The effects of koji-making temperature and time as well as fermentation starters (the picked strains used jointly or separately) on strain growth, the contents of amino nitrogen, reducing sugar and total acids and sensory quality of lobster sauce were investigated. The results showed that the lobster sauce produced by 56 h fermentation at 36 ℃ with both picked strains exhibited the best quality.

Key words: Yangjiang, lobster sauce, mould, fermentation, amino nitrogen

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