In many regions of the world, water hyacinths are starting to become a hazard in lakes, ponds, and rivers. This essay includes a review of the literature on several applications for water hyacinths, mostly in agriculture or alternative energy systems. According to the examination of the literature, water hyacinths can contain up to 3.2% of dry matter (DM) nitrogen and have a C/N ratio of about 15. The water hyacinth can serve as a substrate for the creation of compost or biogas. Nearly all of the substrate's nutrients are present in the biogas process's sludge, which may be utilized as fertilizer. Compost made from water hyacinths has increased yields for a variety of crops. The water hyacinth may be used as chicken, goat, sheep, and cow fodder due to its high protein content. Due to its prolific growth and high nutrient concentrations, water hyacinth has a great deal of potential as both a cattle feed and a fertilizer for the nutrient-poor soils of Africa. Due to the minimal nutrient losses and labor demands, applying water hyacinths directly to the soil after sun drying appears to be the best option for small-scale application. A potential solution to the world's rising energy needs is biogas generation, although this would present significant challenges in poorer nations where the water hyacinth is frequently found. Compared to dried water hyacinths, composting as an alternative treatment has the benefit of a product that is simple to work into the soil. This is due to the disintegrated structure. Water hyacinth harvesting and transportation can be done manually on a simplistic level without the need of a novel harvesting method.