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Laguna State Polytechnic University: I. Project Preliminaries

This document discusses a proposed study on producing bioethanol from bamboo process waste. It will be conducted by four mechanical engineering students in the second semester of 2019-2020. The introduction provides background on bamboo as a feedstock for bioethanol due to its growth rate and availability. Previous studies demonstrated efficient lignin removal and cellulose concentration increase from alkali pretreatment. The background section describes past work on optimizing enzymatic saccharification and fermenting the hydrolysate to produce ethanol. The objectives are to develop an alternative fuel from bamboo and study its potential use in vehicle emissions. Critics of biofuels argue they could increase food prices and emissions once land use changes are considered.

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Eijay Reyes
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53 views2 pages

Laguna State Polytechnic University: I. Project Preliminaries

This document discusses a proposed study on producing bioethanol from bamboo process waste. It will be conducted by four mechanical engineering students in the second semester of 2019-2020. The introduction provides background on bamboo as a feedstock for bioethanol due to its growth rate and availability. Previous studies demonstrated efficient lignin removal and cellulose concentration increase from alkali pretreatment. The background section describes past work on optimizing enzymatic saccharification and fermenting the hydrolysate to produce ethanol. The objectives are to develop an alternative fuel from bamboo and study its potential use in vehicle emissions. Critics of biofuels argue they could increase food prices and emissions once land use changes are considered.

Uploaded by

Eijay Reyes
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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Republic of the Philippines

Laguna State Polytechnic University


Province of Laguna

Concept Paper for Title Defense


ER 421 - Methods Of Research for ME

I. Project Preliminaries

A. Proposed Title No. 1

B. Proposed Title : Production of Bioethanol from Bamboo process waste

C. Proponents
Delacruz, John Aldrick N.
Reyes, Ishmael Edward John U.
Ramirez, Allen Meek S.
Viray, Jerry Miguel Z.

D. Course Program : Bachelor Of Science in Mechanical Engineering

E. Semester/Academic year: 2nd Semester, AY 2019-2020

II. Introduction

Bamboo as a feed stock for bioethanol production is interesting due to


the relatively higher growth rate of these plants and their abundant and sustainable
availability in the tropics. Dendrocalamus are bamboo varieties common in India, of
which large amounts of biomass is generated annually as byproducts of bamboo
processing industries. In the current study, process waste from bamboo industry
was evaluated as a feedstock for bioethanol production by enzymatic
saccharification. Dilute alkali pretreatment of the biomass resulted in efficient
removal of lignin, effectively increasing the concentration of cellulose to 63.1% from
46.7%. Enzymatic saccharification of pretreated biomass was optimized following a
response surface methodology and the optimal set of parameters for maximal
saccharification was derived. Pretreatment method could recover 64.31% of the
total sugar polymers and a hydrolysis efficiency of 82.36% was achieved. Direct
fermentation of the enzymatic hydrolysate was efficient with ethanol production
being 71.34% of theoretical maximum (3.08% v/v ethanol yield). Material balances
were calculated for the entire process from raw biomass to ethanol and the overall
process efficiency was found to be ∼43%. The process has the potential to generate
143 L of ethanol per dry ton of bamboo process waste.
III. Background of the Study

Ethanol production was studied using the enzymatic hydrolysate of alkali


pretreated bamboo. The pretreated biomass was saccharified under the optimized
conditions when a hydrolysate containing 6.68% glucose and 1.32% xylose was
obtained. A nutrient supplement was added to the hydrolysate so that it contained
finally 0.3% Yeast extract, 0.025 M (NH4)2SO4, 0.01 M MnCl2, 0.01 M MgSO4·7H2O,
0.05 M K2HPO4 and 0.05 M NaH2PO4. Fifty milliliter of the hydrolysate in 100 ml
screw capped bottles was inoculated with 5% v/v of a 12 h old seed culture of
Saccharomyces cerevisiae. Incubation was carried out at 28 ± 2 °C without agitation
for 48 h. Fermentation broth was centrifuged at 13,000 rpm for 10 min at 4 °C, and
the supernatant was then filtered through 0.22 µm nylon membrane. The filtrate
was analyzed for ethanol content by HPLC following a modified method of Soto et
al.

IV. Objectives of the Study

The main purpose of the study is to produce an alternative fuel that came from
Bamboo. Bamboo can also produce bioethanol that can be use in engine emissions
for vehicles. Bioethanol is an alcohol made by fermentation, mostly
from carbohydrates produced in sugar or starch crops such as corn, sugarcane,
or sweet sorghum. Cellulosic biomass, derived from non-food sources, such as trees
and grasses, is also being developed as a feedstock for ethanol production. Ethanol
can be used as a fuel for vehicles in its pure form (E100), but it is usually used as
a gasoline additive to increase octane and improve vehicle emissions. But biofuels
are controversial. The majority are derived from food crops, like corn. Critics say the
increased demand for these crops could increase food prices. And although direct
emissions of carbon dioxide from burning biofuels are less than those from
traditional fuels, some scientists now argue that once indirect emissions from land
use changes and producing the crop are considered, the overall emissions from
some biofuels can actually be higher.

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