Biodiesel Production Block Flow

This block flow diagram gives a compact overview of biodiesel production. Vegetable oil, methanol with catalyst, wash water and process heat enter a reaction and purification stage. The principal outputs are biodiesel product and crude glycerol. The glycerol stream leads to methanol recovery, which returns recovered methanol to the process. This structure is useful for a feasibility discussion or process-introduction slide because it shows inputs, products, co-products and recycle without drawing equipment internals. It does not substitute for a heat and material balance or P&ID. Add pretreatment, separation, drying, storage or wastewater handling when those stages are significant for the proposed plant.