sentences:  The ashes are used as fertilizer.In India, of dried water hyacinth yields about 50 liters ethanol and 200 kg residual fiber (7,700 Btu).Bacterial fermentation of yields 26,500 ft3 gas (600 Btu) with 51.6% methane (), 25.4% hydrogen (), 22.1% carbon dioxide (), and 1.2% oxygen ().