Slaughterhouse waste (SHW) management poses severe environmental challenges as it is still treated using classical methods such as landfilling and discharging in rivers, resulting in various environmental concerns. Therefore, this necessitates an urgent shift in the treatment of this waste stream. Against this background, this research focuses on dark fermentation, a microbial-driven process that produces renewable hydrogen from organic matter in the absence of light. By evaluating feedstock composition and emphasising hydrogen production, the study paves the way for the viability of this approach. Developing countries such as South Africa can gain immensely from a diversion of SHW from disposal toward energy recovery and other sustainable solutions. The country hosts more than 430 abattoirs [1]. This work reviewed published literature, and relevant case studies were identified. A key observation is that understanding the composition of SHW is necessary for degradation via dark fermentation to produce biohydrogen. Much of SHW is rumen, blood, and wastewater. Rumen and blood are rich in proteins (44%) and contains lipids (1.04%) and carbohydrates (1,44%), which are essential for dark fermentation. Rumen contains more than 60% cellulose and hemicellulose whereas blood contains more than 40% with less than 1% lignin. The waste was found to be rich in macronutrients and trace elements, which are important for anaerobic biodegradation.