Quantity of water to make 10 kg steam is 10 litres of water. 1 Tph = 1000 kg or litres or 1.0 m3/hr

To heat 1 kg of water from 0 C(37 F) to 100 C(212 F) 100 kcal are needed.
1 Kcal is the quantity of heat needed to rise the temp of 1 kg of water by 1 C.
0.7 to 0.8 of kcal is the quantity of heat needed to rise the temp of 1 kg of wet compost by 1 C.

1 kcal = 3.968 BTU
1 BTU = 0.252 kcal

to convert 1 kg of boiling water to steam about 540 kcal are needed.
so >
1 kg of steam = 100 kcal + 540 Kcal = 640 kcal

and the steam will supply upon condensation 540 kcal + 1 kg of 100C water(100 Kcal)

Calorific value wood 3500 Kcal(ranges 3000 Kcal ~ 3900 Kcal) So 10 kg steam x 640/3500= 1.8 >2.0 kg wood or 1 Tph = 1000 kg/hr x 640/3500 = 183.0 kg/hr. Depending on your boiler efficiency and calorific value/moisture content % which you have not mentioned It will average between 200~250 kg/hr with feed water 100C.

Post #4 by Ducon and then by fixitorelse refers. This is just an add on.

The basis of calculating Boiler Fuel Consumption is kg of fuel / kg of steam produced. The measurement of kg of wood has been discussed above by our learned friends so very correctly. It is now the measurement of kg of steam that you produce that need to be measured. If you have a steam flow meter , then it is simply a quick read off. But assuming that you do not have one in your system, then you need to measure the quantity of feed water consumed / hour - this can be measured from the Feed Water Tank by level difference . But just one point to note is that in the boiler, there may be the effect of evaporation and continuous blowdown. Normally we allow for about 10% for this, which means that the the quantity of water calculated need to be reduced by 10% before you work out the water consumption.