Improvement of biogas production from oil palm empty fruit bunches (OPEFB)

Carrillo-Nieves, Danay; Karimi, Keikhosro; Horváth, Ilona Sárvári

doi:10.1016/j.indcrop.2011.03.022

Cited by 132 publications

(61 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This may be due to the reduction of certain factors limiting hydrolysis such as silica, lignin and hemicellulose or due to changes in the internal structure such as crystallinity or hydrogen bonds. A breakdown in the structure and a reduction in crystallinity have been observed in response to alkaline treatment (Nieves et al, 2011). This might be responsible for the improved attachment of microbial cellulosome (Fontes and Gilbert, 2010), which results in a better digestion after alkaline treatment.…”

Section: Discussionmentioning

confidence: 99%

Chemical composition, cell wall features and degradability of stem, leaf blade and sheath in untreated and alkali-treated rice straw

Ghasemi

Ghorbani

Khorvash

et al. 2013

Animal

View full text Add to dashboard Cite

Three dominant morphological fractions (i.e. leaf blade (LB), leaf sheath (LS) and stem) were analysed for chemical composition and ruminal degradability in three rice straw varieties. In one variety treated with alkali, cell wall features were also characterized using Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy. The highest concentrations of cell wall carbohydrates (hemicellulose and cellulose) were observed in LS, whereas the highest concentrations of non-fibre (silica, phenolic compounds and CP) and lignin were recorded for LB. The stem had the lowest silica and hemicellulose contents but intermediate levels of other components. In terms of ruminal degradability, stem ranked higher than LB, which was followed by LS. Hemicellulose was found to be less degradable than either dry matter or cellulose in all the three fractions investigated. FTIR results indicated that the highest levels of hydrogen bonding, esterification and crystallinity within the cell wall components belonged to LS. In the alkaline treatment, these indices decreased to a larger extent for leaf fractions and a greater improvement was achieved in the degradability of LB and LS compared with that of stem. In the 24-h ruminal incubation, the silicified layer of epidermis and the underlying cell walls showed a rigid structure in the control fractions, whereas the treatment with NaOH resulted in crimping of the silicified cuticle layer and the loss of integrity in cell structure. Despite the highest silica and lignin contents observed in LB, LS showed the lowest degradability, which might be due to its high level of hydrogen bonding, crystallinity and esterification within its cell wall components as well as its high hemicellulose content.

show abstract

Section: Discussionmentioning

confidence: 99%

Chemical composition, cell wall features and degradability of stem, leaf blade and sheath in untreated and alkali-treated rice straw

Ghasemi

Ghorbani

Khorvash

et al. 2013

Animal

View full text Add to dashboard Cite

show abstract

“…They studied the effect of pretreatment with NaOH on the CI of sweet sorghum and showed a reduction in CI from 0.83 to 0.73 after pretreatment with 12% NaOH at 0ºC for 3h. In another study, Nieves et al (2011) reduced the CI of oil palm empty fruit bunches (OPEFB), a waste lignocellulosic material, from 1.05 to 0.46 after pretreatment with NaOH 8% for 60 min. Fig.4.…”

Section: Effect Of Pretreatment On Cellulose Crystallinitymentioning

confidence: 99%

Enhanced ethanol and glucosamine production from rice husk by NAOH pretreatment and fermentation by fungus Mucor hiemalis

2016

Self Cite

View full text Add to dashboard Cite

Please cite this article as: Omidvar M., Karimi K., Mohammadi M. Enhanced ethanol and glucosamine production from rice husk by NAOH pretreatments and fermentation by fungus Mucor hiemalis. Biofuel Research Journal 11 (2016) 475-481. DOI: 10.18331/BRJ2016.3.3.7 Biofuel Research Journal 11 (2016) HIGHLIGHTS Ethanol production from rice husk using Mucor hiemalis was investigated. The maximum ethanol production yield of 86.7%was observed after pretreatment with 2.6 M NaOH at 67°C for 150 min.A highly valuable fungal biomass containing 60 g/kg glucosamine was obtained at optimum conditions. Ethanol production from rice husk by simultaneous saccharification and fermentation using Mucor hiemalis was investigated. ARTICLE INFO ABSTRACTTo reach the maximum ethanol production yield, the most important influencing factors in the pretreatment process, including temperature (0-100°C), NaOH concentration (1-3 M), and the pretreatment time (30-180 min), were optimized using an experimental design by a response surface methodology (RSM). The maximum ethanol production yield of 86.7 % was obtained after fungal cultivation on the husk pretreated with 2.6 M NaOH at 67°C for 150 min. This was higher than the yield of 57.7% obtained using Saccharomyces cerevisiae as control. Furthermore, fermentation using M. hiemalis under the optimum conditions led to the production of a highly valuable fungal biomass, containing 60 g glucosamine (GlcN), 410 g protein, and 160 g fungal oil per each kg of the fungal biomass. © 2016 BRTeam. All rights reserved.Journal homepage: www.biofueljournal.com Omidvar et al. / Biofuel Research Journal 11 (2016) [475][476][477][478][479][480][481] Please cite this article as: Omidvar M., Karimi K., Mohammadi M. Enhanced ethanol and glucosamine production from rice husk by NAOH pretreatments and fermentation by fungus Mucor hiemalis.

show abstract

“…Biogas production has been realized in a lot of palm oil mills (Ji et al 2013 ). EFB has also been investigated for biogas production; however, pretreatment is necessary to improve its biogas yield (Nieves et al 2011 ). Co-digestion of the pretreated EFB with palm oil mill effl uent (POME) can further enhance the biogas production (O-Thong et al 2012 ).…”

Section: Biological Conversion Of Oil Palm Biomassmentioning

confidence: 99%