Production of Ethanol from Beet Molasses by Ca-Alginate Immobilized Yeast Cells in a Packed-Bed Bioreactor

Yekta GÖKSUNGUR; Neşe ZORLU

Makale detayları

Production of Ethanol from Beet Molasses by Ca-Alginate Immobilized Yeast Cells in a Packed-Bed Bioreactor

Yazarlar:

Yekta GÖKSUNGUR | Neşe ZORLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 2001 Vol.25 Issue 3, pp.265-275

Belge Tipi:

Makale

Yayın Tarihi:

2/2001

Belge Dili:

Türkçe

Document ID (Org No.):

2000813815

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

Anahtar kelimeler:

Özet:

 

The continuous production of ethanol from beet molasses by Ca-alginate immobilized Saccharomyces cerevisiae in a packed-bed bioreactor was investigated. The temperature was maintained at 30°C and the dilution rate was 0.22 h-1. Maximum ethanol (4.62%), theoretical yield (82.9%) and volumetric productivity (10.16 gl-1h-1) were obtained from the beet molasses medium containing 10.90% total sugar with 2.0-2.4 mm diameter beads prepared from 2% (w/v) sodium alginate solution. At higher substrate concentrations, substrate was recirculated through the packed-bed bioreactor to increase yields and to decrease residual sugar content. The bioreactor system was operated at a constant dilution rate of 0.22 h-1  for 25 days without loss of original fermentation capacity. Compared to packed-bed bioreactor, lower ethanol concentration (3.94%), theoretical yield (70.7%) and productivity (8.67 gl-1h-1 ) were obtained in the continuous stirred bioreactor.

 

The continuous production of ethanol from beet molasses by Ca-alginate immobilized Saccharomyces cerevisiae in a packed-bed bioreactor was investigated. The temperature was maintained at 30°C and the dilution rate was 0.22 h-1. Maximum ethanol (4.62%), theoretical yield (82.9%) and volumetric productivity (10.16 gl-1h-1) were obtained from the beet molasses medium containing 10.90% total sugar with 2.0-2.4 mm diameter beads prepared from 2% (w/v) sodium alginate solution. At higher substrate concentrations, substrate was recirculated through the packed-bed bioreactor to increase yields and to decrease residual sugar content. The bioreactor system was operated at a constant dilution rate of 0.22 h-1  for 25 days without loss of original fermentation capacity. Compared to packed-bed bioreactor, lower ethanol concentration (3.94%), theoretical yield (70.7%) and productivity (8.67 gl-1h-1 ) were obtained in the continuous stirred bioreactor.

Makale detayları

Production of Ethanol from Beet Molasses by Ca-Alginate Immobilized Yeast Cells in a Packed-Bed Bioreactor

Yazarlar:

Yekta GÖKSUNGUR | Neşe ZORLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 2001 Vol.25 Issue 3, pp.265-275

Belge Tipi:

Makale

Yayın Tarihi:

2/2001

Belge Dili:

Türkçe

Document ID (Org No.):

2000813815

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152

ethanol

beet molasses

calcium alginate

immobilization

packed-bed bioreactor

Sayı

Makale detayları

Production of Ethanol from Beet Molasses by Ca-Alginate Immobilized Yeast Cells in a Packed-Bed Bioreactor

Yazarlar: Yekta GÖKSUNGUR | Neşe ZORLU

Yayıncı: TUBITAK

Dergi: Turkish Journal of Biology 2001 Vol.25 Issue 3, pp.265-275

Belge Tipi: Makale

Yayın Tarihi: 2/2001

Belge Dili: Türkçe

Document ID (Org No.): 2000813815

Sıklık: İki Aylık

eISSN: 1303-6092

pISSN: 1300-0152

ethanol

beet molasses

calcium alginate

immobilization

packed-bed bioreactor

Sayı

Yazarlar:

Yekta GÖKSUNGUR | Neşe ZORLU

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Biology 2001 Vol.25 Issue 3, pp.265-275

Belge Tipi:

Makale

Yayın Tarihi:

2/2001

Belge Dili:

Türkçe

Document ID (Org No.):

2000813815

Sıklık:

İki Aylık

eISSN:

1303-6092

pISSN:

1300-0152