NOVELTY - The pyrolysis apparatus comprises a pyrolysis unit, a feedstock entry device, an additional processing unit, a feedstock restriction device, a housing (200), an exhaust gas collection system, and solids collection system. The pyrolysis unit comprises a first processing unit (205A) comprising a feedstock transport mechanism extending through the processing unit. The feedstock transport mechanism comprises sections that move the feedstock at respectively different rates through the processing unit, and comprises an auger defining folded portions on a flighting.    USE - The modular pyrolysis apparatus is useful for reducing feedstock to gaseous energy sources and recyclable solids and for production of combustible organic and inorganic gases, where the feedstock includes biomasses such as wood, grass, clippings, plant stalks, leaves and mulch, municipal solid wastes, bio-solids, medical waste, hazardous waste products or fossil fuels such as oil/grease sludge.    ADVANTAGE - The pyrolysis apparatus is portable, and ensures efficient and rapid reduction of the feedstock.    DETAILED DESCRIPTION - The pyrolysis apparatus comprises a pyrolysis unit, a feedstock entry device, an additional processing unit, a feedstock restriction device, a housing (200), an exhaust gas collection system, and solids collection system. The pyrolysis unit comprises a first processing unit (205A) comprising a feedstock transport mechanism extending through the processing unit. The feedstock transport mechanism comprises sections that move the feedstock at respectively different rates through the processing unit, and comprises an auger defining folded portions on a flighting. The sections comprise auger sections. The auger sections comprise the flighting of respective pitches. The flighting defines cut sections in the flighting for adjusting an exposure of feedstock components to pyrolysis. The auger sections comprise the folded portions for adjusting the exposure of feedstock components to pyrolysis. The processing unit comprises retort surrounding the feedstock transport mechanism and the auger. The additional processing unit is connected to the first processing unit. The first processing unit and the additional processing unit are removably connected to each other, and are individually portable modular portions of the pyrolysis apparatus. The feedstock occupies a consistent volume of the retort along a length of the retort. The feedstock entry device moves the feedstock from a feedstock source to the feedstock transport mechanism. The feedstock restriction device: is positioned between the feedstock entry device and the feedstock transport mechanism; limits the entry of ambient air into the feedstock moving into the pyrolysis apparatus; compresses the feedstock to push air out of the feedstock; is adjusted to allow variable volumes of feedstock through the feedstock restriction device; and comprises inwardly directed projections emanating from an outer perimeter. The housing surrounds the feedstock entry device, and defines a port for exhausting air squeezed out of the feedstock. The projections are adjusted to define variable lengths within the outer perimeter.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic side plan view of a pyrolysis apparatus.    Housing (200)    First processing unit (205A)    Feedstock inlet (220A)    Gas output outlet (230A)    Solids output outlet. (240A)