Biofuel: Eco-friendly Renewable Energy made from Water Hyacinth (Eichhornia crassipes) and Plastic (Polyethylene) using Fermentation Method and Thermal Cracking

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Biofuel: Eco-friendly Renewable Energy made from Water Hyacinth (Eichhornia crassipes) and Plastic (Polyethylene) using Fermentation Method and Thermal Cracking

Category : Riset Lebih Lanjut

The demand of fossil fuels in the world including in Indonesia are increasing at alarming rate and running ahead of supply. This energy crisis has forced the world especially Indonesia to develop a renewable energy. Water hyacinth (Eichhornia crassipes) is an aquatic plant with a very high growth rate which removes nutrient elements from water and the causes of eutrophication. Nevertheless, water hyacinth potentially to be processed become bioethanol due to its contain of 48% hemicellulose, 18% cellulose and 4% starch. Eichhornia crassipes’s lignocellulose processed into fermented glucose by using Saccharomyces cereviciae, which then readily processed into ethanol. Based on Chromatography Gas analysis, pure ethanol obtained in this experiment reached 87.24%. According to statistics of Indonesian domestic waste, plastic garbage lies on the second rank of whole garbage that is 5.4 million tons per year, of which 30% of the total plastic used is LDPE (Low Density Polyethylene). LDPE to be processed become liquid hydrocarbons by using thermal cracking. At a temperature of 550ºC, polyethylene will decompose and through the fractional distillation will be obtain the liquid fuel. From FTiR analysis, known that in this liquid fuel there is aromatic compounds substitution that resembled a gasoline. After all, make the biofuel by mixing both of bioethanol from Eichhornia crassipes (B) and liquid fuel from LDPE (L) with variables, B:L = 1:9, 3:7, 5:5, 7:3, and 9:1, then did the Research Octane Number analysis. This experiment can produce biofuel with RON (Research Octane Number) over 86, which can be the substituent of fossil fuels.


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