When we had the ranch, we had a square hole in the ground about 14’ by 14’ and about 12’ deep, with a narrow sloping chute from ground level to the bottom of the pit, for makeup air.
On the bottom we layered old logs, limbs, crap that burned and then filled it with trash/garbage, old paint cans, old AL furniture, anything that would either burn or melt. Before the match was applied, we’d stack another wood layer on top, apply a little diesel, and light her off.
For the first hour or so we’d get some smoke, but after the fires really got going, the flames turned incandescent and smokeless, the heat so intense you had to shield your face at fifty feet. 48 hours later you had, maybe, a foot of ash and debris. We did this every spring. We never made a trash run!
Geez, hot enough to incinerate everything, even algore’s carbon footprint.