Sludge-to-energy systems can make the dream of a circular economy a reality by turning waste into an input, instead of just an output. These systems can be developed as independent, decentralized units that require minimal outside energy for operations. From raw sewage, they generate three useful products: energy, digestate and water that can be reused for agriculture, industry and even domestic uses such as watering gardens and flushing toilets.

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Originally Posted at WRI by and

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