We use a lot of wood-based materials, and most of the leftovers from manufacturing are burned in our furnaces for the factory heating. In colder months, we also use gas-powered furnaces to heat our factory. For the gas part, I’m sure the correct way would be to add it in the A3 section as gas burned in the furnace for thermal energy, but how do I handle the wood based leftovers that comes in as raw materials in A1 but is being used for manufacturing in the first place and will not end up in landfill but rather turns to energy in our own factory?
Yes, that’s correct to model the gas in A3. For the waste wood incineration, it should also be modelled in A3.
There are some intricacies with this modelling, as there may not be a dataset for waste wood incineration. This requires using wood incineration and removing the “virgin” wood as the feedstock, on the assumption that the waste wood is burden free.
We can help you with the details of this modelling approach and the specifics of your process through support.
I got an answer from Kamil in support about how to model this. But how do I handle ashes that come from furnaces? This is transported to landfill, but how do I show that the raw material comes from A1 in the first place and then goes through a furnace, generates heat and then ends up as ash in the landfill?
Although we are supporting you with this modelling via Consulting, I’m replying here if others in the Community are interested about this topic.
The raw material waste should be modelled as additional material in A1 as production loss. This waste is then used as feedstock for the furnace to generate heat for production. We can model this as Secondary fuel, but need to remove the original feedstock (virgin wood chips) from the heat production dataset using a negative quantity. The resulting ash is sent to landfill as an output in A3 Manufacturing waste.
That’s it in short, however, there is a bit more complexity in the detail so if anyone has similar production, please reach out to us directly so we can support you with it.