| dc.creator | Riansa-ngawong,Wiboon | |
| dc.creator | Suwansaard,Maneewan | |
| dc.creator | Prasertsan,Poonsuk | |
| dc.date | 2012-11-01 | |
| dc.date.accessioned | 2019-05-03T12:45:01Z | |
| dc.date.available | 2019-05-03T12:45:01Z | |
| dc.identifier | https://scielo.conicyt.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000600001 | |
| dc.identifier.uri | http://revistaschilenas.uchile.cl/handle/2250/85308 | |
| dc.description | Palm pressed fiber (PPF) is a clean and renewable lignocellulosic material. The PPF and delignified PPF (DPPF) were used as a carrier for immobilization of Candida shehatae TISTR5843 in bioethanol production. PPF was pre-treated by milling to obtain small particles, whereas DPPF was the delignification of PPF using NaClO2. C. shehatae TISTR5843 was grown in modified yeast extract- malt (YM) medium at 30 ± 2ºC on an orbital shaker at 150 rpm for batch and repeated batch fermentation. In the batch system, immobilized cells on a small size, less than 0.5 mm, of DPPF (sDPPF) gave the maximum ethanol production of 11.5 g L-1 at 24 hrs cultivation period. The ethanol concentration and ethanol yield of sDPPF were 6.2% and 6.8% higher (ethanol production 11.5 g L-1, ethanol yield 0.47 g g-1) than those of free cells (ethanol production 10.8 g L-1, ethanol yield 0.44 g g-1) after 36 hrs of cultivation. In contrast, the small size of PPF (sPPF) was selected as a carrier in repeated batch fermentation for cost effectiveness. The ethanol productivity of immobilized yeast cells in repeated batch fermentations was 45.2-51.6% greater than that obtained from batch fermentations. The immobilized cells on sPPF improved the ethanol production and could be reused 4 times with retaining the activity of 93%. In conclusion, PPF is a potential carrier in the immobilization system. The pre-treatment of PPF increases the surface area that enhances cell adsorption and ethanol production by C. shehatae TISTR5843. | |
| dc.format | text/html | |
| dc.language | en | |
| dc.publisher | Pontificia Universidad Católica de Valparaíso | |
| dc.relation | 10.2225/vol15-issue6-fulltext-1 | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.source | Electronic Journal of Biotechnology v.15 n.6 2012 | |
| dc.subject | Candida shehatae | |
| dc.subject | ethanol production | |
| dc.subject | immobilization | |
| dc.subject | palm pressed fiber | |
| dc.title | Application of palm pressed fiber as a carrier for ethanol production by Candida shehatae TISTR5843 | |
