Utilization of Some Sugar Industrial by- Products and Fructan Storing Crops for Bioproduction of Citric Acid | ||||
| Alexandria Science Exchange Journal | ||||
| Article 3, Volume 31, OCTOBER- DECEMBER - Serial Number 4, October 2010, Page 323-330 PDF (410.88 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/asejaiqjsae.2010.2326 | ||||
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| Authors | ||||
| Mona, I. Massoud* 1; Mona H. Bekhet* 2 | ||||
| 1Sugar Crops Research Institute, Agric. Research Center, El-Sabahia, Alex. Egypt | ||||
| 2Food Science and Technology Dept, Faculty of Agric.,Univ of Alex, El-Shatby., Egypt | ||||
| Abstract | ||||
| Two sugar industrial by-products, cane bagasse “SCB” and sugar beet molasses “SBM” along with two fructan storing crops ,chicory roots“CR” and Jerusalem artichoke tubers “JA”, alone or after mixing were utilized as a carbon source in fermentation medium to produce citric acid by Aspergillus niger strainGQ890276. It was found that the proximate composition and total sugars content of these agro-materials played a role in terms of citric acid production . Moisture ranged from 6.55 to 23.15%; crude fat from zero to 1.55%; crude protein from 3.27 to 8.53%; crude fiber from zero to 47.46% , ash from3.29 to 8.93% ,nitrogen free extract from 44.83 to 87.06 % and total sugar 8.11 to 87.06% among these materials. The fermentation media either containing mixture of CR +SCB and/or CR as carbon source gave high citric acid yield after 7 days of fermentation comparing with other used carbon sources. The citric acid yield was 59.36 g/L in CR +SCB medium .It was 87.80% when calculation was based on the amount of consumed fermentable sugars. Also this media gave the high biomass ( 22.90 g/L)yield. | ||||
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