PARE SUMMER SCHOOL 2014
Final Report
(Submission Deadline: 18th September 2014)
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University
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Institut Teknologi Bandung
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Name
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Mohammad Azis Mahardika
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PARE ID No.
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PARE26-009
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Group No.
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4
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You will write a report (500 words) on your group’s
discussion.
In the report, you will:
A)
propose how you
can contribute as a specialist to realize your group’s master plan, and
B)
propose a title
of research paper related to the master plan.
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a.
My master plan is to make a human waste to be useful by making it into
fuel for biogas plant and fertilizer for plant. As we know the human waste
now is stored in the septic tank and mixed with the waste water in the sewage
and it can be source of diseases for human, whereas human waste can be used
to generate electricity and become fertilizer to plant. So, As a mechanical
engineer specialist, for the beginning I can contribute to help the design of
biogas plant component such as the biogas plant generator and other tools for
biogas plant. To design the component, first I have to know the amount of
human waste produced per day, then I can calculate how many biogas such as CH4
produced, then I can design the generator capacity that fit with the amount
of the biogas produced. After that I can involved in maintenance of the
biogas plant so it will be sustain for a long time and I can improve the
efficiency of biogas plant by researching and developing the technology for
the biogas plant. The problem for the biogas plant is the cost to construct
it. But if we see the benefit of the human waste for biogas plant such as it
can reduce green house gas (GHG) as we know that CH4 GHG factor is
21 times higher than CO2, so by convert the CH4 into CO2
it will reduce the impact of GHG, biogas plant can saves fossil fuels and it
is source of renewable energy. with this many benefits I think it’s worth to
build the biogas plant and for the cost problem we can ask government to help
funding the biogas plant or we can find communities that support the green
technology to help funding our master plan.
For the fertilizer, we used the waste
after it processed from the digester, and processed to become fertilizer. As
for waste water used in our plant, it can be processed to become fresh water
by some method using a membrane to filter the waste water and the purified
water can be used for irrigation.
b.
The title I propose is “Increase efficiency for biogas plant”, based on
the article from http://www.electrigaz.com/ we know that generally the
efficiency of the biogas plant is around 25 to 40 %, so it still low and theoretically it can
increase. There are 4 method so we can improve the efficiency of the biogas
plant such as substrate pretreatment, fermentation, biogas purification,
biogas utilisation. And according to my major I choose the substrate
pretreatment method to improve the efficiency for biogas plant. Substrate
pretreatment is treatment to make the substrate (human waste) smaller and
dry, so the biogas such as CH4 will be produced more, and the time
to produce the biogas (fermentation) is faster, so it will save time and
increase the efficiency of the biogas pant, there are many ways to treat the
substrate such as ultrasonication, extruder, bursting reactor, mills, and
etc.
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