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24 December 2009

Bioethanol from COCONUT

Jakarta - It was not only able to palm produce biosolar, but could bioethanol produced from coconut pulp and water, even the waste from palm bioethanol can still be used as bio-gas mixture.

It is a study of three children SMA Negeri 2 Pare, Kediri, East Java, which is Muh. Wildan Yahya, Ardhy Purwo, and Diana won Sekar Sari Competition Youth Scientific Works (LKIR) to 41 fields of Engineering Sciences LIPI organized.

According Wildan contacted from Jakarta, Thursday (29/10), there are three types of biofuels namely biosolar which is a mixture of diesel with vegetable oils that have been dimetilasi, bioethanol, which is an alcohol produced by fermentation, while the biogas produced from anaerobic decomposition of biomass by bacterial methanogenesis.

Currently, he said, making biosolar, bioethanol and biogas is conducted separately, in which biosolar of lemon oil palm, bioethanol from sugar cane or cassava which is fermented and biogas from cattle dung.

"And all three can be produced from coconuts (Cocos nucifera) gradually cultivated," said I LKIR champion of the work entitled: "Optimization of Coconut Biofuel Production by Processing-story" is.

According Wildan, coconut is abundant in Indonesia could be blackmailed and yield of vegetable oil in which biosolar to one liter of 0.48 kg biosolar need coconuts.

Pulp, he added, do not be discarded, because it still has a large amount of cellulose and live performed by acid hydrolysis and fermented with Saccharomyces cerevisiae.

Similarly, coconut water, can add a bit of urea before fermentation, and if the sugar content less than 17 percent, it can be added glucose or sucrose.

With 6.56 kg of coconut pulp can produce a liter of bioethanol yield 95 percent, while for a liter of coconut water, as much as 11.4 percent could be bioethanol, he said.

This bioethanol waste, continued Wildan, if mixed with cow dung can become the first biogas is pH neutralization.

"From 100 liters of waste produces 2.5 m3 of bioethanol, biogas. Biogas waste also can be used as fertilizer," he added. (Ant / waa)

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