Publications by authors named "Walaiporn Timbuntam"

2 Publications

  • Page 1 of 1

Application of bipolar electrodialysis on recovery of free lactic acid after simultaneous saccharification and fermentation of cassava starch.

Biotechnol Lett 2008 Oct 21;30(10):1747-52. Epub 2008 Jun 21.

Department of Biotechnology, Faculty of Agro-Industry, Kasetsart University, Bangkok, Thailand.

The efficiency of bipolar electrodialysis (BED) for the recovery of lactic acid from fermentation broth was evaluated. Three systems of BED (bipolar-anion, bipolar-cation and bipolar-anion-cation) at fixed voltage (20 V) were compared using a model solution of ammonium lactate (100 g l(-1)). Results showed that bipolar-anion (BED-anion) was the most beneficial in terms of lactate flux, current efficiency, energy consumption and recovery ratio. Consequently, BED-anion was used to purify lactic acid from fermentation broth which had been pre-treated with mono-polar electrodialysis (MED). The final lactic acid concentration and lactate flux obtained were 144 g l(-1) and 393 g m(-2) h(-1), respectively. Using the two-step process (MED and BED-anion) the concentration of fermentation broth was increased by 33% and the total energy consumption was 2.76 kW h kg(-1).
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http://dx.doi.org/10.1007/s10529-008-9771-9DOI Listing
October 2008

Lactic acid production from sugar-cane juice by a newly isolated Lactobacillus sp.

Biotechnol Lett 2006 Jun 18;28(11):811-4. Epub 2006 May 18.

Kasetsart Agricultural and Agro-Industrial Improvement Institute, Kasetsart University, Bangkok 10900, Thailand.

A newly isolated sucrose-tolerant, lactic acid bacterium, Lactobacillus sp. strain FCP2, was grown on sugar-cane juice (125 g sucrose l(-1), 8 g glucose l(-1) and 6 g fructose l(-1)) for 5 days and produced 104 g lactic acid l(-1) with 90% yield. A higher yield (96%) and productivity (2.8 g l(-1 )h(-1)) were obtained when strain FCP2 was cultured on 3% w/v (25 g sucrose l(-1), 2 g glucose l(-1) and 1 g fructose l(-1)) sugar-cane juice for 10 h. Various cheap nitrogen sources such as silk worm larvae, beer yeast autolysate and shrimp wastes were also used as a substitute to yeast extract.
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http://dx.doi.org/10.1007/s10529-006-9003-0DOI Listing
June 2006