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That's standard in the US. As is N+1 on the boilers, chillers, and associated pumps. The boilers are also dual-fuel: natural gas and oil (just in case). During an emergency or outage a "green solution" takes a back seat to a reliable solution.

Or just skip the fermentation step and burn it solid in a boiler. Like coal or trash, the emissions going up the flue will be a hassle* to corral and there's ash to deal with. Better than sending it straight to a landfill and simpler than trying to ferment "whatever". * Easier to do than with...

I can, in a steam plant. A steam turbine doesn't care where the steam came from as long as the temperature, pressure, and flow rate are what it wants. If the boiler can handle the fuel and the fire is the right temperature and size, you're in business. For something like an automobile, truck...