Production of L-lactic acid from corn starch hydrolysate by immobilized Rhizopus oryzae on a new asterisk-shaped matrix

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바이오화학분류

- 바이오플라스틱
  1. 플라스틱
- 바이오정밀화학
  1. 기타
- 화장품용 기능성소재
  1. 계면활성제⁄증점제
- 의료용 화학소재
  1. 치료제
  2. 식품첨가제

논문

Production of L-lactic acid from corn starch hydrolysate by immobilized Rhizopus oryzae on a new asterisk-shaped matrix

학술지

Advanced materials research : AMR

저자명

Chen, Xin; Zhang, Bing Bing; Wang, Yuan Liang; Luo, Yan Feng; Wang, Run Guang; Ren, Hui Qing; Xu, Hong Ji

초록

<P>A new asterisk-shaped matrix composed of stainless-steel mesh and cotton cloth was emloyed for immobilizing Rhizopus oryzae As3.3462 cells. The ability of the immobilized cells to produce L-lactic acid was evaluated by using corn starch hydrolysate as carbon sources. The cells were attached onto the matrix with nearly 100% efficiency within 5 h and demonstrated asterisk mycelia morphology rather than a pellet-like cake as exhibited by the free-cells. Consequently, the immobilization fermentation resulted in higher L-lactic acid concentration (82.79 g.L-1 vs 48.23 g.L-1) within a shorter time (60 h vs 72 h) than the free fermentation. In addition, the stability of the immobilized cells for a long-term fermentation was investigated in 8 consecutive fermentation batches for 30 days. The maximum variation of L-lactic acid concentration among these batches was less than 10%. These results imply that the proposed asterisk matrix is good for Rhizopus oryzae immobilization and provids a simple and feasible fermentation strategy for L-lactic acid production.</P>

발행연도

2011

발행기관

Trans Tech Publications, Ltd.

ISSN

1022-6680

ISSN

1662-8985

권

347

페이지

pp.1193-1197