Page 83 - Biofuels Refining and Performance

66 Chapter Two

comes out of the digester in the form of a slurry, which is separated into
a sludge, which is used as fertilizer and a stream of waste water.
Research is ongoing to produce renewable energies from different plant
sources, which will necessarily dominate the world’s energy supply in
the long-term. Using renewable-energy system technologies will create
employment at much higher rates than any other technologies would [1].
There are economic opportunities for industries and craft jobs through
production, installation, and maintenance of renewable energy systems.

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