What kinds of biofuel (wood chips, sawdust, corn etc.) industrial boilers are available to provide steam for a new manufacturing plant. May want to look into dual fuel with propane. This would be a large operation.
Industrial boilers are manufactured for all types of fuel :solids,liquids & gas.
The more the options are introduced for burning the higher the cost and the complex the firing-system.
Be specific to detail your application as to available of fuel, capacity of boiler and operating pressure.
Boiler is a hardware available in thousands. Have you carried out your research in bio-fuels available? their supply, price factor etc? Suggest you first undertake this to come to your selection of the right type biofuel on which the boiler to be designed.
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