Semi-Continuous Production Process of Corn Vinegar in Stirred Tank Reactor Using Fixation of Acetobacter aceti WK on Surface of Loofa Sponge

Authors

  • Warawut Krusong Fermentattion Technology Laboratory, Faculty of Agro-Industry, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand.
  • Panit Petch-nom Agronegar Co.Ltd., 99/3 Moo 7, Yanyao, Samchuk, Suphan Buri 72130, Thailand.
  • Prapas Pinviset Agronegar Co.Ltd., 99/3 Moo 7, Yanyao, Samchuk, Suphan Buri 72130, Thailand.

Keywords:

semi-continuous production process, corn vinegar, stirred tank reactor, Acetobacter aceti WK, loofa sponge

Abstract

Previous study by the authors showed that an alternative process to an airlift fermenter in the green vinegar production process could use a loofa sponge (a natural agricultural fibrous material) as the supporting material for Acetobacter aceti WK. Subsequently, aim of this study was production of green vinegar in a stirred tank reactor (STR). The filtered corn wine was supplied to the STR using fixation of A. aceti WK cells on the surface of a loofa sponge cut to a thickness of 2.5 cm. The loofa sponge was left in the STR until 60% of fermenting volume had been used. The charging rate of fresh, filtered corn wine for a semi-continuous production process was investigated. The highest acidification rate (ETA) was achieved at a charging rate of 30%. After 14 d of the adaptation period, the average acidity of 4.1±0.1% was produced during six cycles of fermentation at 30°C and 1vvm aeration supply within 40 d, while the ETA was in the range 0.0028%/h to 0.0067%/h. Scanning electron microscopy (SEM) showed that the surface of the loofa sponge acted as a good fibrous structure for cell fixation of A. aceti WK in the STR. 

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Published

2010-06-30

How to Cite

Warawut Krusong, Panit Petch-nom, and Prapas Pinviset. 2010. “Semi-Continuous Production Process of Corn Vinegar in Stirred Tank Reactor Using Fixation of Acetobacter Aceti WK on Surface of Loofa Sponge”. Agriculture and Natural Resources 44 (3). Bangkok, Thailand:454-61. https://li01.tci-thaijo.org/index.php/anres/article/view/244950.

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Section

Research Article