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This research aimed to determine the chemical composition of Rawapening, Semarang District, Indonesia water hyacinth and to study the effect of pyrolysis time on the volume of liquid smoke products. The water hyacinth was cut into pieces with a size of about 2 cm to 3 cm, and placed in pyrolisator. A total of 700 g of water hyacinth sample was fed into the pyrolysis. The product was observed for its content of hemicellulose, cellulose and lignin. The pyrolysis was carried out at a temperature of 117 °C, 400 °C and 683 °C. The results showed that water hyacinth contains hemicellulose 36 % d.b, cellulose 21 % d.b and lignin 7 % d.b which it potential to be a raw material for liquid smoke production. The effect of temperature was significant on liquid smoke products. It was proven that the higher the pyrolysis temperature, the greater the liquid smoke produced. The liquid smoke was obtained for 0.2 mL per 100 g, 12.3 mL per 100 g and 16.3 mL per 100 g dried biomass water hyacinth at a temperature of 117 °C, 400 °C and 683 °C, respectively.

Pyrolysis of Water Hyacinth [Eichhornia crassipes (Mart.) Solms] for Liquid Smoke Production