NOVELTY - Pyrolysis apparatus comprises: a combustion chamber (1) for high temperature low oxidative combustion of the feedstock having an inlet at a first end (4) and outlet for the biochar (5) at a second end (6); a heater to heat the combustion chamber; and at least one gaseous outlet (8) positioned between the ends and communicating with the chamber interior, where each gaseous outlet is provided with an air venturi to control the extraction of pyrolysis gas produced within the combustion chamber.    USE - The apparatus is useful for processing carbon rich precursor feedstock into carbon rich biochar and associated carbon rich by-products, preferably pyrolytically generating biochar and associated pyroligneous gas products from the feedstock (claimed).    ADVANTAGE - The pyrolysis apparatus: works substantially at/or below atmospheric pressure and thus eliminates the need for high pressure valves and seals to control the production of biochar and pyrolysis gasses; adopts steady state operation on the combustion chamber to passively remove pyroligneous gasses; and is free of maintenance and is a highly reliable apparatus.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for pyrolytically generating biochar and associated pyroligneous gas products from carbon rich precursor feedstock, comprising (a) preheating the continuous flow pyrolysis combustion chamber to a desired start-up temperature using an external heater, (b) feeding a precursor feedstock into the first end of the combustion chamber, (c) heating the combustion chamber with minimal oxidation, (d) extracting pyroligneous gasses from various positions within the combustion chamber between the first and second ends to draw away various gas compounds and condensates produced at various positions, (e) drawing biochar from the second end of the combustion chamber, and implementing gas extraction to maintain internal pressure of the combustion chamber at the atmospheric pressure or below.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic representation of the pyrolysis apparatus.    Combustion chamber (1)    First end (4)    Biochar outlet (5)    Second end (6)    Gaseous outlet (8)