Allow animal fat in biofuel composter
Since it is mostly the animal fat that the meats provide in making biofuel, please allow animal fat (the product in the kitchen bench) to be used along with tree sap to make biofuel. In fact, you could even drop cooked meat and replace it with animal fat. Alternatively, allow the biofuel composter to make biofuel up to a given number units without having a container attached. This would also allow a fuel pipe to be constructed to carry fuel to any number of equipment pieces in addition to filling cans, lanterns, etc.)
I agree with the first half not the second, do not allow a composter to fill equipment directly. I would recommend a storage tank and a separate building part. tank could be used to store fuel, or water even attach to the rain catcher/water pump.