Dear A.D. Karve,
My name is Deepak D.G. and I am from Bali Indonesia.
I just want to add to the number of installed biogas of your design by 7
units in Bali.
I finished the installation in the month of august 2010 and they are
running well now.
Rgsd,
Deepak
Message: 1
Date: Sat, 8 Jan 2011 11:47:03 +0800
From: Anand Karve <adka...@gmail.com>
To: For Discussion of Anaerobic Digestion
<digestion@lists.bioenergylists.org>
Subject: Re: [Digestion] Renewable Energy World biogas article
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<aanlktinwcfg3v_oo8vrdr-xpm7cp91pbjthvjjjrz...@mail.gmail.com>
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Dear Randy,
I give below information about a small biogas plant developed by us. You can
contact me personally if you want commercial information.
Yours
A.D.Karve
*ARTI biogas technology*
*Background*
? The organisms that produce biogas reside in the intestines of
animals. They exit from the animal body along with dung.
? The traditional biogas plants use dung as feedstock. 1 kg dung
produces about 20 to 30 litres biogas after a fermentation period of about a
month.
? ARTI scientists argued that since these organisms lived in the
intestines, they ate what the animals ate.
? Experiments with human food showed that 1 kg (dry weight) of human
food yielded 600 to 800 litres biogas within a fermentation period of just
24 hours.
? ARTI biogas system, based on human food waste, is about 600 to 800
times as efficient as the dung based biogas plant.
*Compact biogas plant by ARTI*
? Because of lower feedstock requirement, and because it is consumed
rapidly, ARTI biogas plant is small. A 1000 litre digester is sufficient
for a family.
? Small size of the plant allows it to be accommodated in any
available space, even on the terrace of a house.
? Fabricated from locally available plastic water tanks, it is
installed in just a couple of hours. It can even be moved around.
? Food waste is plentifully available in urban areas from
restaurants, canteens, vegetable markets, fruit juice vendors, flour mills,
oil mills, etc.
? Therefore, technology is suitable for urban areas. Almost 5000
plants of this type have so far been installed in India and abroad.
*Special features of ARTI biogas plant*
? Ideal technology for disposal of wet garbage. A 1000 litre plant
accepts daily about 2 kg wet garbage.**
? In nature, the methanogens get their food masticated by animals.
Therefore, food waste must be pulped before introducing it into the biogas
plant. **
? About 10 litres water is needed daily as a carrier of the
feedstock. It generates daily 10 litres effluent. **
? Because food waste gets completely converted into biogas, the
effluent is watery. It can be recycled or used for watering plants.**
? In the case of industrial canteens, hostels, resorts and housing
colonies, the design and size of biogas plants depend on the amount and type
of waste and the available space.**
* *
*A rural biogas plant using green leaves as feedstock*
? Experiments with green leaves showed that 10 kg pulped green
leaves produced 800 to 1000 litres biogas. **
? However, midribs, veins and petioles accumulate as undigested
debris inside the digester and ultimately choke the system.**
? A prototype has been developed from which the accumulated debris
can easily be removed without stopping biogas production. **
? Such a plant can be introduced into rural areas, as growing a
leafy crop or plucking leaves from existing vegetation is possible. **
* *
*A method for green leaf production*
? 50 to 100 sq.m.plot surounded by a skirting of transparent plastic
film is planted with a high yielding multicut fodder species. **
? Effluent and leaf debris from the biogas plant provide nutrients
to this plot. Daily water requirement is between 5 to 8 litres per sq.m. **
? 1 or 2 sq.m.area is harvested daily. Leafy waste from crops like
cabbage, carrot, radish, and weeds from the field are also acceptable.**
*Purification of biogas*
? Biogas contains volumetrically about 40% carbon dioxide and 60%
methane.
? Therefore biogas has a calorific value of only about 4000 kcal/kg
as against about 11000 kcal/kg of pure methane.
? Storing biogas in a moving drum floating over water removes carbon
dioxide from biogas.
? 95% pure methane is obtained after 3 days.
*Biogas as fuel in internal combustion engine*
? Biogas can replace 100% petrol or kerosene and 80% of diesel.
? It is quite possible to use biogas in unpurified state in internal
combustion engines.
? Using it in stationary engines for pumping water or for generating
electricity causes no problems.
? Using it as vehicular fuel is difficult, because it involves
compression of biogas and filling it into cylinders.
On Wed, Jan 5, 2011 at 3:48 PM, Randy Mott <randym...@ceeres.eu> wrote:
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