[Digestion] Renewable Energy World biogas article

[Deepak D. G.]

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 <adkarve at gmail.com>
> To: For Discussion of Anaerobic Digestion
> 	<digestion at lists.bioenergylists.org>
> Subject: Re: [Digestion] Renewable Energy World biogas article
> Message-ID:
> 	<AANLkTinwcfg3v_oo8VrdR-xpm7cp91pbJTHVJjjrzB54 at mail.gmail.com>
> Content-Type: text/plain; charset="windows-1252"
>
> 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 <randymott at ceeres.eu> wrote:
>
>