<p>Solid waste generation has become a global concern due to escalating population, urbanization, and rapid consumerism. Consequently, billion tonnes of non-biodegradable waste are produced annually all over the world. Many nations are observing rising trends in the treatment of solid waste, which is driving up demand for waste treatment technologies. Particularly in waste management and recycling, shredder machines have become essential pieces of equipment in many recycling industries. A shredder machine is an initial processing unit designed to reduce solid waste into smaller pieces, facilitating its conversion into useful products. The existing market for shredder machines largely features variations of the same fundamental design. Their performance primarily depends on the efficiency of the shaft and the design of the blades. This article focuses on the significant influence of blade shape and orientation in both single and dual-shaft configurations on shredding efficiency. The main objective is to explore the different blade geometries and orientations that directly affect shredding performance. Additionally, the article aims to identify research gaps in the realm of solid waste shredder machines.</p>