NOVELTY - The system comprises first and second cultures of methanogenic archea for converting an input material (20) into an output material (70), first and second reactor vessels for housing a portion of the cultures of methanogenic archea, an input material stream (24), an output material stream created in part by the culture of methanogenic archea (26), a condenser environmentally coupled to the output material stream port, a unit for controlling the flow of the input material stream into the reactor vessel, and an atmospheric pressure adjustment system.    USE - The system is useful for creating useful products such as methane and green natural gas as a fuel or component for manufacturing specialty chemicals such as green plastics using methanogenic archea.    ADVANTAGE - The system is capable of efficiently, economically and continuously creating improved quality useful products such as methane and green natural gas using methanogenic archea with high yield.    DETAILED DESCRIPTION - The system comprises first and second cultures of methanogenic archea for converting an input material (20) into an output material (70), first and second reactor vessels for housing a portion of the cultures of methanogenic archea, an input material stream (24), an output material stream created in part by the culture of methanogenic archea (26), a condenser environmentally coupled to the output material stream port, a unit for controlling the flow of the input material stream into the reactor vessel, an atmospheric pressure adjustment system, an oxidation reduction potential adjustment system, a growth media solution, and a thermal conditioning assembly operationally coupled to the reactor vessel. The input material stream is directed into the reactor vessel (30) to facilitate contact between the input material stream and the methanogenic archea. The reactor vessel comprises an input material stream port for operationally coupling the reactor vessel to a source of the input material stream, an output material stream port for facilitating removal of the output material stream, an agitation system, a recirculation system, and a pH adjustment system. The agitation system is partially positioned within the reactor vessel, and comprises an agitation drive unit and an impeller operationally coupled to the agitation drive unit. The impeller is positioned within the reactor vessel, and rotates at greater than 110% of the resonance of the vessel. The agitation and recirculation systems enhance the contact between the input material stream and the culture of methanogenic archea. The pH adjustment system facilitates the maintenance of a pH of the methanogenic archea combined with a mixture of the input and output material streams, and comprises a pH buffer agent. The condenser allows a gaseous portion of the output material stream to be separated from a non-gaseous portion of the output material stream. The atmospheric pressure adjustment system facilitates the control and maintenance of atmospheric pressure within the reactor vessel. The oxidation reduction potential adjustment system facilitates the maintenance of an oxidation reduction potential of the methanogenic archea combined with a mixture of the input and the output material streams. The input material stream is routed into the reactor vessel at a rate of 1.9-2.6 standard cubic feet per minute (scfm) per 5 cubic feet of reactor vessel volume and routed through a sparger positioned within the reactor vessel, where the sparger creates bubbles (1-10 microns in diameter). The output material stream is generated at a rate of 45-70 VVD. The input material stream comprises the output of a gasifier. The growth media solution promotes the on-going growth of the culture of methanogenic archea, and comprises macro and micro ingredient solutions. The micro ingredient solution is prepared using deaerated water and maintained in anoxic condition to maintain iron ions as iron+3. The macro ingredient solution is prepared under normal atmospheric conditions and then deaerated, and is added to the deaerated macro ingredient solution. The micro ingredient solution is added to the deaerated macro ingredient solution at a ratio of 1 part micro ingredient solution to 250 parts macro ingredient solution. The media growth solution is directed into the reactor vessel through a media input port, and is maintained under a nitrogen blanket. The pH buffer agent is prepared as normal solution of less than 1.0. The input material stream is directed through a gas filtering unit prior to directing into the reactor vessel. The gas filtering unit and output stream filtering unit comprise a water gas shift reactor, a pressure swing adsorption reactor, a vacuum swing adsorption reactor and membrane filter, which has a pore size of 2-10 Angstrom . The output material stream is directed into an output stream filtering unit, which comprises a methane output and a recycling output that is directed back into the reactor vessel. The thermal conditioning assembly maintains an internal temperature (60-65 degrees C) for the reactor vessel. The second reactor is operationally coupled between the input and output material streams in parallel with the reactor vessel. The culture of methanogenic archea comprises methanobacterim thermoautotrophicum or methanothermobacter thermautotrophicus, a thermophile, and a xenophile. The methane output is directed as an input into a specialty chemical processing facility. An INDEPENDENT CLAIM is included for a method for the creation of useful products using methanogenic archea.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic functional block diagram of a system for the production of methane and other useful products.    Input material (20)    Input material stream (24)    Culture of methanogenic archea (26)    Reactor vessel (30)    Output material. (70)