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KMID : 0380020030180060495
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Korean Journal of Biotechnology and Bioengineering
2003 Volume.18 No. 6 p.495 ~ p.499
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Production Behavior of Amino Acid from High Temperature and High Pressure Water Reaction of Fish Entrails
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Kang Kil-Yoon
Chun Byung-Soo
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Abstract
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The effect of operating parameters (reaction temperature and time) and reaction modes (batch and semi-batch) on the behavior of amino acid production from hydrothermal decomposition of fish-derived wastes was investigated. The amino acids obtained in batch experiments at temperature of 250 were mainly alanine (Ala) and glycine (Gly) at maximum yield of 65 and 28mg/g-dry fish, respectively. At relatively lower temperature of 200, the yield of high-molecular-weight amino acids such as aspartic acid (Asp) and serine (Ser) is high, but decreases as temperature increases. It is likely that high-molecular-weight amino acids decompose faster than low-molecular ones. Semi-batch mode of reaction suppressed decomposition of amino acids into organic acids (or volatile materials) by continuously removing the products from the reaction zone as soon as they are formed. Thus, large amount of high-molecular-weight amino acids such as Asp and Ser at this reaction mode was observed.
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KEYWORD
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Hydrolysis, proteins, amino acids, hydrothermal reaction
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