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The waste problems of salts and Glycerol

The following is reproduced from Biofuel list members texts owned by Keith


Pannir wrote in Biofuel list :

As Brazil's having almost 46 percent of the best land that are very good for irrigation as well as have very good water resource distributed, the world bio fuel business is very keen on Brazilian biofuel project , as this country is now world leader about bio fuel at present. However this position is disputed now also by USA, the future is uncertain about the same who will win .As the two country business model is different, where micro distillery of Brazil can produce about half of the price of etanol and Biodiesel, the small one is competting well with the bigger on , as the micro ethanol distillary can make rapadura , animal feed , liquid fertilizer , without problem of distribution of these far way .The same model is also true for biodiesel Thus the big company can also accommodate small one.Thus we hope the glycerine waste need to be for internal market for local comunity as everything is imported in the area where biofuel glycerine is now mostly lost only very less is used. Eventhoug these waste can be used for compost and biogas very successfully our research is sure that biodegrable plastics, some protective films for the fruits can be more viable due to local market. We wish to have decentralized market oriented products development from glycerol waste . In the same direction of thinking of the most of the list members here , we wish the intermediate and social oriented technology .Any green investments , Eco business venture for the benefit of the several farmers , who are responsible for the bio fuel production are more welcome , as the Brazilian central government is now giving green seal and certificate , financial loan independent of brazilian or foriegn investor . Any collaboration , foreign investment are welcome .We will be happy to support any project for the benefit for the small farmer based on waste glycerol. Please feel free to contact us , as this business model will have great impact on future Bio fuel . Thanking You Yours sincerely Pannirselvam 2007/7/1


, The biofuel list member wrote in the biofuel list :
: *We will be interested to look at this project more carefully to make it a into production process. Will it be possible to provide us with more information on your exact direction on this project. * On 27/06/07,

Pagandai Pannirselvam wrote:
Dear list members
A very large quantities of liquid effluents (all acid, catalysts, glycerol) , after producing biodiesel are disposed as waste in one of the big projects which had been given social green seal from Federal , Government of Brazil.
The JTF and this list have very extensively given importance to this topic focusing on biogas , fuel and soap production .
Is any one have other biodegradable plastics, solid biofuel and simple polymer products that can be produced in a decentralised , ecologically sustainable way for employment generation form this huge amount of waste.possible to make wealth for many . Any help in this regard are very welcome .
> > sd >
Pannirselvam

The solution to the waste problems of Biodeisel


Glycerine and biogas


The following is reproduced from Biofuel list members texts owned by Keith and also availble in http://journeytoforever.org/biodiesel_glycerin.html#biogas

A visitor to our website told us this:
    "I work at a wastewater treatment plant and I was doing a search on glycerin and biofuels and came across your website. It has good information, thanks.

    "Here's another use of glycerin: Our treatment is accepting the glycerin from a biofuel producer, we feed it to our digesters, slowly very slowly. The addition of glycerin has dramatically increased our gas production, so that we run all three engines that produce electricity for our plant and occasionally need to flare off the excess methane (we have four4 flares).

    "This might be of interest to your readers who use digestion for electricity."
The biogas is used as fuel in diesel engines which power electricity generators. But this wasn't raw by-product, it was separated glycerin from a commercial producer:
    "The glycerine is agricultural grade and looks similar to thin maple syrup.

    "As for pH, since the chemistry in the anaerobic digester is healthy, a high pH wasn't much of a concern. Our main concern was foaming with the introduction of glycerin, and we did see an increase hence the slow feed rate to the digester."
Can the unseparated by-product, the whole glycerin-catalyst-soap cocktail, also be used to increase biogas production?

Biofuel mailing list member, researcher Prof. Pagandai Pannirselvam in Brazil, said:
    "Very good news to make the gas and liquid biofuel in an integrated way.

    "There are many published papers about the enhanced production of biogas from oily wastes and glycerine is a good intermediate metabolite, hence the results agree with theory.

    "But here too we need a mixed microbial population to work well and they will need a lot of adoption time for glycerine, otherwise one may totally fail to produce gas.

    "There are two routes to get energy from waste of the BioDiesel making process, bioconversion and thermo-conversion. I believe the combined Biogas generation is better than combustion. The correct mixture of proteins and glycerine and salt needs to be carefully solved by practical work."

Anaerobic Digestion of Glycerol and
Methanol-Water-Mixture from Transesterification

Methanol-Water-
Mixture: ca. 10 kg/t Biodiesel
970 m3Biogas/t Methanol = 730 m3CH4/t Methanol
= 7,3 m3 CH4/t Biodiesel = 73 kWhTotal
helektr. = 0,35 htherm. = 0,5
219 kWhelektr. (0,1 €/kWh) 314 kWhtherm.(0,03 €/kWh)


Glycerol: ca. 130 kg/t Biodiesel
730 m3Biogas/t Glycerine = 426 m3CH4/t Glycerine
= 55,4 m3 CH4/t Biodiesel = 554 kWhTotal


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