NOVELTY - Biodegradation of lignin in water hyacinth by Phanerochaete chrysosporium, comprises: cleaning water hyacinth, drying for 5 days and cutting into pieces of 2 cm size; mashing water hyacinth to mesh size of less than or equal to 40; adding water at a ratio of 1:3 by weight of water hyacinth; introducing water hyacinth and water into bioreactor, closing the lid tightly and sterilizing using an autoclave for 20 minutes at 121 degrees C and a pressure of 2 atmospheres; inoculating water hyacinth with fungal inoculum developed with liquid malt extract; and incubating water hyacinth for 10 weeks at room temperature.    USE - The process is useful for biodegradation of lignin in water hyacinth (claimed) for producing bioethanol.    ADVANTAGE - The process utilizes Phanerochaete chrysosporium for lignin biodegradation in water hyacinth by, hence it is environmentally friendly, consumes less energy, produces no waste, and facilitates maximum bioethanol production.    DETAILED DESCRIPTION - Biodegradation of lignin in water hyacinth by Phanerochaete chrysosporium, comprises: cleaning water hyacinth, cutting into pieces of 2 cm size and drying for 5 days with a water content of 10-14%; mashing the water hyacinth to a mesh size of less than or equal to 40; adding water at a ratio of 1:3 by weight of water hyacinth; introducing water hyacinth and water into a bioreactor, closing the lid tightly and sterilizing by autoclaving for 20 minutes at 121 degrees C and a pressure of 2 atmospheres; inoculating water hyacinth with fungal inoculum that has been developed with liquid malt extract as much as 10 wt.% of the water hyacinth; and incubating the water hyacinth for 10 weeks at room temperature. An INDEPENDENT CLAIM is also included for preparation of fungal inoculum by incubating Phanerochaete chrysosporium fungus on potato dextrose agar medium for 7 days, and further cultivating in a liquid media containing malt extract liquid medium for a long incubation period of 10 days.