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Volume 9
Journal of Bioremediation & Biodegradation
ISSN: 2155-6199
Biofuel Congress 2018 &
Biomass 2018
September 04-06, 2018
JOINT EVENT
September 04-06, 2018 | Zurich, Switzerland
13
th
Global Summit and Expo on
Biomass and Bioenergy
&
12
th
World Congress on
Biofuels and Bioenergy
Bioethanol Production from Perennial Grasses
Satyawati Sharma
1
, Kalpana Arora
2
and
Garima Tiwari
1
1
Centre for Rural Development and Technology, IIT Delhi-New Delhi
I
n the present demand for renewable and sustainable sources of energy to overcome the burden of world energy crisis, perrenial
grasses present exciting options.
Panicum virgatum
(Switchgrass) the ligno-cellulosic perennial grass, being considered as a
cheaper and efficient feedstock for bioethanol production in Europe and USA, could also be utilized in India for same purpose.
The present work focuses on cultivation of
P. virgatum
(very first time in India) and
P. maximum
, for bioethanol production. The
seeds of the Switch grass were obtained from Univ. of Bologna, Italy, while of guinea grass from IGFRI, Jhansi, UP, India. Both
the grasses were cultivated in Micromodel (an experimental field site), IIT Delhi. The harvested grass biomass was analyzed for
various parameters including reducing sugars for subsequent bioethanol production. Among different pretreatment methods
(Acid pretreatment, Alkali pretreatment and Microwave pretreatment) tested , alkali method showed maximum reducing
sugars (280 mg/g for
P. virgatum
and 262 mg/g for
P. maximum
) with 15 % reduction in crystallinity of cellulose in
P. virgatum
and 12% in
P. maximum
. It was further optimized with RSM and CCD was applied. Joint effects of four independent variables:
NaOH (1-5%), temp. (60-100 ºC), substrate loading (1-3%), and reaction time (30-150 min), were investigated to increase in
reducing sugar content. The combined optimum conditions for maximum reducing sugar (68.3% ) were: 2.5% substrate, 5%
NaOH, a reaction time 120 min at 100 ºC. The result analyzed (ANOVA) with a second order polynomial equation. showed
62 - 68 % significant increase in reducing sugars. The calculated theoretical ethanol production from switch grass was found
to be 26.72%, while for
P. maximum
it was 25.24%. This study reveals that under optimized pretreatment conditions, sugar
yield is significantly increased and promises the use of both
P. virgatum
and
P. maximum
grasses as feedstock for bioethanol
production in India also. All the findings pertaining to all steps in cultivation, characterization, pretreatment and hydrolysis
methods and bioethanol from these grasses will be presented at conference.
Recent Publications
1. Adak, A., Tiwari, R., Singh, S., Sharma, S., & Nain, L. (2016) Laccase Production by a Novel White-Rot Fungus,
Pseudolagarobasidium acaciicola LA 1 Through Solid-State Fermentation of Parthenium Biomass and Its Application in
Dyes Decolorization.
Waste and Biomass Valorization,
7, 1427-1435.
2. Arora, K., Sharma, S., &Monti, A. (2016) Bio- remediation of Pb and Cd polluted soils by switchgrass: A case study in India.
International Journal of Phytoremediation,
7(18), 704-709.
3. Arora, K.; Kumar, A., & Sharma, S. (2012) Energy fromWaste: Present Scenario, Challenges and Future Prospects towards
Sustainable Development. IGI Global, 271-296.
Satyawati Sharma et al., J Bioremediat Biodegrad 2018, Volume 9
DOI: 10.4172/2155-6199-C1-014