Any kind of biomass based on carbon, hydrogen and oxygen (CHO) can be converted into syngas. Noticeably, the performance of the gasification process depends on the physical and chemical properties of the biomass fed. The parameters that most influence the process are the following:

- Water content: moisture in the biomass must be reduced to a very low value (<10%) before feeding the gasifier
- Ash content: ashes are inorganic compounds that do not add heating value and affect the performance of the system if present in significant quantity or with particularly low melting point
- Heating value: measures the energy content of the fuel and determines the biomass consumption of the plant at constant output
- Composition: the relative content of C and H and the chemical species prevailing in the biomass (lignin, cellulose, resins) affect the relative amount of gas, liquid and solid products of pyrogasification and their qualitative characteristics
- Size: it is a relevant parameter from the point of view of both plant and process. Too fine or dusty material does not allow the reactor bed to "breathe" properly, preventing the correct flow of the syngas. If the available biomass is too fine or dusty, the proper particle size of the material can be achieved through the production of pellets or briquette

Bio&Watt gasification plant can be fed with a wide variety of biomass, separately or mixed (normally with wood chips).

Wood chips   Pellet   Pruning residues   Corn stalks   Bagasse
Sawmill residues   Waste wood   Oil seeds residues   Olive pomace   Marc
Vine prunings   Rice husks   Tomato peels   Shells and pits   Citrus pulp
Anaerobic digestate   Chicken manure   Water sludge   Paper mill sludge   Peat
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