NOVELTY - Increasing the conversion of biomass-based lignocellulosic materials in a biotreatment process, comprises: subjecting the biomass-based lignocellulosic materials to a low-temperature, long-time pyrolysis to produce (a) a pyroligneous acid, (b) a pyrogas containing methane, carbon monoxide, hydrogen and water, and (c) pyrosolids including char, ash and residual lignin-containing materials; separating the pyroligneous acid, pyrogas and pyrosolids; and subjecting the pyroligneous acid to an anaerobic biological treatment step to produce at least one of a methane-bearing biogas and ethanol.    USE - The method is useful for increasing the conversion of biomass-based lignocellulosic materials in a biotreatment process to produce at least one of a methanaceous fuel gas and ethanol (claimed), where ethanol is useful as an automotive fuel additive, typically being used at levels up to 10%, and the materials are wood, paper, paper mill wastes, sewage sludge, municipal solid wastes, dried plants, sawdust, corn stover, and solid wastes from other renewable fuel processes.    ADVANTAGE - The method: provides separated pyrosolids as an agronomic soil amendment; provides conversion of slowly biotreatable compounds into compounds which are readily biotreatable by anaerobic microorganisms, thus increases the overall conversion of biomass-based lignocellulosic materials at high efficiency to fuel gases and/or ethanol and/or other energetic liquid fuels or commercial chemicals, leading to enhanced yield of fuel; reduces materials required to be land-filled or disposed and thus significantly reduces the quantity associated disposal costs; produces enhanced fuel gas with high heating value; and utilizes pyroligneous acid from the instant pyrolysis process which reduces the raw material cost for ethanol fermentation and may reduce treatment costs of waste materials.    DETAILED DESCRIPTION - Increasing the conversion of biomass-based lignocellulosic materials in a biotreatment process, comprises: subjecting the biomass-based lignocellulosic materials to a low-temperature, long-time pyrolysis to produce (a) a pyroligneous acid, where a substantial portion comprises wood alcohol and wood vinegar, (b) a pyrogas containing methane, carbon monoxide, hydrogen and water, and (c) pyrosolids including char, ash and residual lignin-containing materials; separating the pyroligneous acid, pyrogas and pyrosolids; and subjecting the pyroligneous acid to an anaerobic biological treatment step to produce at least one of a methane-bearing biogas and ethanol. An INDEPENDENT CLAIM is also included for enhancing the anaerobic treatment of a first lignocellulose-containing material, comprising: introducing the first lignocellulose-containing material to an anaerobic biotreatment step, where methanogenic microorganisms produce a methane-containing biogas and an aqueous stream containing residual biosolids; separating the biogas from the aqueous stream containing biosolids; dewatering the residual biosolids; subjecting the residual biosolids materials to a low-temperature, long-time pyrolysis to produce a pyrolysis product; condensing the pyrolysis product to produce (a1) a liquid pyroligneous acid where a substantial portion is comprised of wood alcohol and wood vinegar, (b1) the pyrogas, and (c1) pyrosolids including char and ash materials; separating the pyroligneous acid, pyrogas and pyrosolids; introducing the pyroligneous acid to the biotreatment step; introducing at least a portion of the pyrogas to the biotreatment step, where the introduced pyrogas portion mixes with the biogas produced in the biotreatment step; and separating and removing the mixed pyrogas and biogas for use as a fuel gas.