This picture was taken at start up, its just fumes from the plastic inside that tank.
That tank is enclosed separated from the gasifier.
The heat from the gasifying process will pyrolyse the content of the inner tank.
After the picture was taken, i did experiment with hoses and adjusting the suction, passing the fumes trough the nozzle…
Wow, what a fun, looking the flames changing color…
poored a few spoons water into that tank…
don’t try it at home… i am the expert in doing things wrong, but all went well 
