Status : Verified
| Personal Name | Ngohayon, Joel Marc A. |
|---|---|
| Resource Title | Parametric study on the microwave-assisted alkali pretreatment of various lignocellulosic biomass as feedstock for bioethanol production |
| Date Issued | 11 April 2019 |
| Abstract | In the production of lignocellulosic bioethanol, it is important to identify a feedstock with relatively high amounts of structural sugars and a good pretreatment method which can effectively disrupt its recalcitrant structures allowing for the high recovery of its structural sugars. Three lignocellulosic biomass – itchgrass, abaca stripping waste, and office paper waste – all of which have relative high amount of structural sugars, relative local abundance and low level utilization, were investigated as potential bioethanol feedstock. This study primarily focused on evaluating the applicability of the microwave-assisted alkali pretreatment in enhancing the enzymatic digestibility of the aforementioned lignocellulosic biomass. A two-level factorial experimental design for three factors was used with each factor varied between two levels: 1% (w/v) and 5% (w/v) for the NaOH concentration, 100 W and 300 W for the microwave irradiation power, and 1 min and 9 min for the reaction time. The optimal pretreatment condition achieved in terms of reducing sugar yields after enzymatic hydrolysis was 5% (w/v) NaOH concentration, 300 W microwave irradiation power, and 9 min reaction time for both abaca stripping waste and office paper waste. While the optimal condition for itchgrass was 5% (w/v) NaOH concentration, 100 W microwave irradiation power, and 9 min reaction time. At these pretreatment conditions, sugar recovery was 75.37% for the itchgrass, 84.62% for the abaca stripping waste, and 61.54% for the office paper waste – all of which have markedly higher sugar recoveries as compared to the results of the enzymatic hydrolysis of the unpretreated and conventional heating-pretreated lignocellulosic biomass. |
| Degree Course | Master of Science in Environmental Engineering |
| Language | English |
| Keyword | bioethanol; lignocellulose; microwave pretreatment; solid waste; waste to energy |
| Material Type | Thesis/Dissertation |
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