Modern modification technologies might help shift waste biomass which has been mistakenly considered as an environmental issue into profitable products. If you apply this, the changes will occur more rapidly. It is possible for three significant features of biomass waste to be improved by the application of physical, biological, and physicochemical procedures. Porosity, surface area, and chemical composition are all examples of elements that are included in this category by definition. The generation of energy, the synthesis of materials, and the cleanup of the environment are three areas in which these approaches particularly excel. Physical adjustments such as shrinkage and steam explosion are two examples of modifications that can be made to biomass in order to improve its structure for the purposes of bioenergy and filtration. The structural integrity of the biomass is designed to be improved through the implementation of these improvements. The removal of unwanted components and the enhancement of reactivity are accomplished by the use of acid and alkali operations, in addition to other chemical treatments. The utilization of microorganisms and enzymes is what makes biological changes possible. These modifications allow for the controlled transformation of biomass. Through the utilization of case studies and innovative methods, the objective of this chapter is to investigate these techniques and discuss the manner in which they derive value from waste biomass. The ways in which these methods contribute to environmentally conscious thinking and the circular economy will also be discussed. If we are able to discover new applications for materials that are already in existence, we will be able to reduce our influence on the environment while simultaneously accelerating the advancement of research on sustainable energy and materials.