NOVELTY - A low oxygen content liquid producing method involves calcining calcium carbonate bearing granular material. The granular material is cooled. The calcined calcium carbonate bearing granular material is rapidly mixed with biomass feedstock at desired pyrolysis temperature. The gaseous and suspended particulate pyrolysis products are drawn out of the pyrolysis chamber and separated into particulate portion. The clean gas portion is cooled. The calcium carbonate bearing granular material and pyrolysis ash from pyrolysis chamber is removed, followed by returning the material to calcining step.    USE - Method for producing low oxygen content liquid.    ADVANTAGE - The method enables minimizing the production of gas, from pyrolysis of biomass. The liquid has reduced acidity.    DETAILED DESCRIPTION - A low oxygen content liquid producing method involves calcining calcium carbonate bearing granular material at more than 900 degrees C. The calcined calcium carbonate bearing granular material is cooled at more than 900 degrees C. The calcined calcium carbonate bearing granular material is rapidly mixed with biomass feedstock at desired pyrolysis temperature, thus heat from the calcined calcium carbonate bearing granular material causes fast pyrolysis of the biomass feedstock, and calcium oxide in the granular material absorbs carbon dioxide from the pyrolysis products. The gaseous and suspended particulate pyrolysis products are drawn out of the pyrolysis chamber and separated into a particulate portion composed primarily of char and a clean gas portion. The clean gas portion is cooled, thus condensing a liquid fraction and leaving a non-condensing gas fraction. The calcium carbonate bearing granular material and pyrolysis ash from the pyrolysis chamber is removed, separated followed by returning the calcium carbonate bearing granular material to the calcining step.    DESCRIPTION OF DRAWING(S) - The drawing shows a side view of a method for producing low oxygen content liquid.    Continuous flow oven (A)    Cooling chamber (B)    Shuffle tray feeder (C)    Bulk tank (D)    Rotating drum mixer (G)