System and Method for Producing Ethanol and Biogas

This invention outlines a process to produce ethanol and biogas from plant material. It prepares the plant material to release sugars, ferments them into an ethanol-rich liquid, and then distills the ethanol. The leftover whole stillage is separated, with the thin stillage portion anaerobically digested to produce biogas, and the filtered liquid from this stage is recycled back to the fresh plant material.

Why it matters: Since 2012, membrane filtration technologies, particularly for industrial waste streams, have become more efficient and cost-effective. This could enhance the viability of the integrated stillage processing and liquid recycling described.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedBioreactors, distillation column, membrane filtration system

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