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Join Date: Mar 2007
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Pineapple Distillation

03/11/2007 10:00 AM

Hi my name is Yaw ,23 year old chem.Eng from Ghana.I would like to know an appropriate yeast to use in fermenting pineapple and how to distill into alcohol since there are thousands of tons of pineapple export rejects and nobody knows what t do with it.Any help on this subject would be greatly appreciated.

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#1

Re: Pineapple Distillation

03/11/2007 10:51 PM

http://www.distillery-yeast.com/

search under yeast +"high alcohol tolerance"

http://www.google.com/search?hl=en&q=yeast+%2B%22high+alcohol+tolerance%22&btnG=Google+Search

you will need a multiple effect evaporator

http://www.google.com/search?hl=en&q=alcohol+%2B%22multiple+effect%22&btnG=Google+Search

The pineapples can be crushed and washed to get sugar water out and then the amount of sugar adjusted so that when the yeast dies the sugar is also gone at around 17-18% alcohol.

Then it is distilled to whatever % you want. You might be able to find someone there able to do it? or you must build the plant. Thius takes experience and $$.

Good luck

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Guru

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#2
In reply to #1

Re: Pineapple Distillation

03/11/2007 11:10 PM

Just curious... What type of alcohol do you wind up with?

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Guru
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#3
In reply to #2

Re: Pineapple Distillation

03/11/2007 11:39 PM

With pineapple you get ethanol.

He might try to establish a winery...

http://en.wikipedia.org/wiki/Pineapple_wine

more profits.

Ghana has balance of trade problems caused by oil importation. A local spurce of ethanol to reduce oil imports would be useful

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#4
In reply to #3

Re: Pineapple Distillation

03/12/2007 2:01 AM

COULDENT YOU CRUSH THE PINAPPLE AND FERMENT IT IN A STILL, THE PINAPPLE BECOMES A MASH & IF PUT UNDER LOW HEAT THE EVAPORATION WOULD BE METHONAL. A SECOND EVAPORATION WOULD INCREASE THE PROOF TO MOTOR FUEL.

WOULDEN'T THE REGULAR COOKING YEAST MAY FIT THE BILL.

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#6
In reply to #4

Re: Pineapple Distillation

03/12/2007 9:00 AM

Never heard of methanol (wood alcohol) from sugar based materials. Is this correct?

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Anonymous Poster
#8
In reply to #4

Re: Pineapple Distillation

03/12/2007 1:48 PM

Cooking (baking) yeast has a lower alcohol tolerance than that found in wine. Don't remember exact numbers but seems like baking yeast quits producing alcohol when concetration reaches 8-12%. Some champagne yeast can tolerate concentrations near 20% by volume. Adding water to reduce concentration will require more energy to distill it back out.

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#9
In reply to #4

Re: Pineapple Distillation

03/12/2007 2:09 PM

Yeast produces ethanol and CO2 when acting upon sugars. I suspect ethanol is a preferred fuel additive/substitute as it will mix (miscible for those who prefer engineer/chemist lingo) with gas, oil, and water. I have read that some mixtures of gasoline, ethanol, and water seem to perform as well or better than gasoline/ethanol mixtures. This is good since it is impossible to distill pure ethanol. At about 90% alcohol/10% water (190 proof US) an azeotrope is formed which has a lower boiling point than pure alcohol.

If you can't distill it all consider mixing it with other vegatble matter and composting it. If you have a source of nitrogen such as urea to add to the mix it will break down even faster. Once composted it can be put down anywhere plants are growing and if there is residual sugar it makes good plant food. Perhaps you could export it as organic compost too.

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#5
In reply to #2

Re: Pineapple Distillation

03/12/2007 7:38 AM

As a biochemical engg having experiance for past 3 yrs in fermentation , its not so easy as it sounds. think about the sterile reactor , its mixing system for effective mass transfer,perfect cleaning after batch, waste disposal........these are engg and environmental probs.in biological side the microorganism may give different yield though process parameters are maintained perfect.still lot more in the bio part.Totally it is not an impossible task but reqires equal expertise in both engg and biology and handfull of experiance

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Anonymous Poster
#7
In reply to #5

Re: Pineapple Distillation

03/12/2007 9:12 AM

It would be a lot easier to use a fast pyrolysis process.....There are several methods, but all produce some form of the same results, 60% bio-Oil, 20% natural gas, 20% charcoal powder....The oil can be burned as fuel directly ,or further processed into specific purpose use..The gas is typically used in the process as a heat source to mitigate energy cost..The char can be used as fertiliser, or burned as fuel, or used to produce black ink..

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Anonymous Poster
#10

Re: Pineapple Distillation

03/12/2007 4:05 PM

Good Lord! Ask a bunch of engineers a simple question and they will complicate it far beyond reason. Ordinary bakers yeast will work and get you to around 5% ethanol. You can do better by buying a champaigne yeast. Since it has to be shipped th Ghana, I wouls suggest a dry yeast. You only need one packet though since it will grow and reproduce like mad in sugar water or pineapple juice. You can drink the resultant wine, or distill the ethanol out and use it for fuel. Not that I, an old hillbilly, has ever done anything similar... that would be a violation of several laws here...

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#11

Re: Pineapple Distillation

03/14/2007 2:55 PM

Getting some form of fermented ethanol product is a trivial exercise compared with
the choice / elimination of the esters that will distill out with the alcohol.
(I'm assuming here that the ethanol is for drinking rather than biofuel as it's a more
economically attractive price alternative.)

Pineapple brandy might well make a very profitable cash product, but only experement
with distillation, addatives, aging etc. will determine the taste.
(Virtually no raw brandy is drinkable. - You might have to experement with charcoal
filtering.)

You might have to add sugar or boiled down juice and make a cordial instead of a true
brandy.

Since your location is equatorial, you might look into solar distillation.
(Higher start-up cost but economically beneficial in the long run.
The spent mash may be dried for fuel, used as fertilizer, or as cattle feed.

I forsee a long, lazy, and somewhat befuddled term of experementation before
the process is finalized, but the journey might be worth it

Happy tinkering!

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