Ethanol from seaweed project to get a major boost

Last Updated: Monday, May 30, 2011 - 14:15

Ahmedabad: The project of deriving ethanol from a seaweed is all set to get a major boost with the Central Salt and Marine Chemical Research Institute deciding to ramp up off-shore production of the weed by manifolds.

The joint project of Council of Scientific & Industrial Research (CSIR) and Ministry of New Renewable Energy (MNRE) is expected to give a major push to efforts in the country for producing ethanol, a bio-fuel, from sources other than cash crops like sugarcane.

"We are planning to increase cultivation of ethanol producing seaweed - Kappahycus alvarezi- say in a few hectares of area about 5 to 10 km`s inside sea with the help of over
1,000 bamboo rafts," CSMCRI director Dr Pushpito Ghosh said.

The institute has already demonstrated cultivation of seaweed inside 2-3 km of sea on the bamboo rafts, without using any pesticides.

"The sea venture shall be advantageous in two ways. Firstly, the sap derived from seaweed will help raise the nation`s sugarcane yield by 10 to 30 per cent, secondly the
seaweed bio-mass will be a source for ethanol," he said.

Ethanol is used as blend with petrol to lower emission levels. The Centre has fixed 2012 as the deadline for making 10 per cent ethanol blend with petrol mandatory, industry
sources said.

"On filtering fresh seaweed crush we get sap, which is a bio-fertiliser. The residue solid contains polysaccharides, which is then converted into sugar and fermented to produce
ethanol," Ghosh said, explaining the process of obtaining ethanol from the seaweed.

Sourcing millions of tonnes of ethanol, from sources other than sugarcane, to run cars on blended fuel has been a major challenge before the nation. The issue has time and
again raised concern over the country`s food security.

CSMCRI is also in the process of optimising the technology to scale up extraction of ethanol from the seaweed so as to make it more commercially viable.

"Efforts are underway to optimise the technology to scale up extraction of ethanol from seaweed bio-mass to upto 10 litres level," Ghosh said.

The institute had produced one litre of ethanol extraction from a certain quantity of seaweed bio-mass and successfully ran an Ambassador car on blended fuel (10 per
cent ethanol with petrol), in the past.

"Off-shore seaweed cultivation doesn`t require land or pesticides. At the same time it offers livelihood opportunity to people living in coastal belts," Ghosh said.

CSMCRI has recently filed applications for Indian patent and PCT (multi-country patent) for the process of integral production of ethanol from seaweed.

"Off late Japan and Korea have also begun exploring the possibilities of deriving ethanol from this very seaweed on similar lines," industry sources said.

Seaweed so far was being cultivated extensively in countries like Philippines and Indonesia, but India is also likely to emerge as major producer of the ethanol producing
seaweed, they said. Kappaphycus alvarezii, which yields a thickening agent called kappa-carrageenan has a wide range of application in a variety of industries.

Apart from sugarcane, the sap derived from it finds usage in enhancing the yield of several other crops as well.

"Very soon research shall be undertaken in many agricultural colleges across the nation to discover the crops benefiting from it and its impact on soil," Ghosh said.

CSMCRI has got patents for integrated method of production of carrageenan and liquid fertiliser from seaweed in the United States, Europe, China, Indonesia, and India.

PTI



First Published: Monday, May 30, 2011 - 14:15

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