ABSTRACT
This research work focus on the design of bio-waste grinding machine for Anaerobic Digestion (AD) system. Two different conceptual designs were drawn; the best conceptual design was selected for detail design using decision matrix. The results obtained from the detail design show that a grinding force and power of 150N and 2.5 horse power (HP) were required for grinding an average mass of 5.87 kg of bio-waste. The machine was evaluated for performance and from the analysis, the machine was efficient (71.08%) and it was able to grind the bio-waste to the required sizes. Besides, the fine particles size has shorter hydraulic retention time (HRT) and an improved biogas yields. Therefore, for optimum biogas yields, bio-waste grinding machine is required.
