کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6375477 | 1624816 | 2016 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Bioethanol production from non-edible de-oiled Pongamia pinnata seed residue-optimization of acid hydrolysis followed by fermentation Bioethanol production from non-edible de-oiled Pongamia pinnata seed residue-optimization of acid hydrolysis followed by fermentation](/preview/png/6375477.png)
- Pongamia pinnata seed residue represents a promising source for ethanol production.
- Effect of H2SO4, HCl and H3PO4 on P. pinnata seed residue hydrolysis was studied.
- Acid treatment for 60Â min was used for hydrolysis of P. pinnata seed residue.
- 41% of theoretical maximum ethanol was formed from the seed residue conversion.
De-oiled Pongamia pinnata seed cake has been gaining attention as a promising feed stock for ethanol production owing to the large amounts of carbohydrates (42% w/w) present in the seed biomass. This, coupled with the potential of seed productivity (>200,000 t annumâ1) makes it suitable for the sustainable production of ethanol. The present research explores the application of glucose obtained from acid hydrolysis of the seed cake for ethanol production in a three step process: acid treatment, neutralization and fermentation. The Taguchi robust design of experiments was employed to study the effects of the parameters including acid type (H2SO4, HCl, H3PO4), acid concentration (2-6% w/w), and temperature (80-100 °C) on the formation of glucose. Among the reaction variables considered, acid concentration and temperature showed a positive effect on glucose release from the biomass with HCl the best catalyst compared to H2SO4 and H3PO4 showing highest glucose formation (173.4 g kgâ1 seed residue) at 100 °C with 6% w/w HCl concentration. The energy required for this pretreatment was estimated to get an insight into the process energy demand (1080-1110 KJ kgâ1 of seed cake). Downstream processing before fermentation included neutralization. Fermentation of hydrolysis product obtained from 2%, 4% and 6% HCl treatments (carried out using Saccharomyces cerevisiae) gave 67.52, 74.98 and 88.62 g ethanol kgâ1 dry seed residue, respectively, corresponding to â¼31.45%, 34.92% and 41.28% of theoretical ethanol (214 g kgâ1) formation, calculated based on ethanol produced per gram of carbohydrate in the seed residue.
Journal: Industrial Crops and Products - Volume 94, 30 December 2016, Pages 490-497