Citrus are among the world's more frequently treated fruit, resulting in enormous amounts of by-products that are high Carbohydrates, glucan, hemicellulose, gelatin, and oils are all high in simple sugar, organic matter, cellulose fiber, pectin, and essential oils. In today's rapidly expanding globe, waste production is rising in enormous amounts on a daily basis, affecting ecosystem health and, eventually, human health. However, a significant quantity of leftovers end up as trash in an agricultural field or a disposal hole. The current study focuses on the technologies and methods for using citrus by-products, like important oil extraction feedstock, carbon and bio-oil synthesis, oxygen synthesis gas, and so on. Citrus pulp is a very efficient adsorption material for the removal of metals and compounds from industrial wastewater. The next generation potential power is the Polymer Electrolyte Membrane Fuel Cell, which was created by synthesizing citrus pulp-derived activated charcoal. The current research seeks to make thorough use of these value added byproducts in order to make logical use of this rich resource while also protecting the atmosphere.