NOVELTY - Producing marsh gas involves pouring fermentation raw material into feedstock tube (10). Inner annular pipe and multiple fermentation zone inside the tubes produces different amounts of marsh gas. Air pressure promotes large fermentation area and generates a large area full of fermented marsh gas. The continue fermentation of marsh gas does not fill the fermentation zone (40). The marsh gas is produced within the inner annular pipe. The marsh gas will ferment within the pipeline (30) and then squeezed to the feedstock tube and discharging pipe. The pipeline has cloth bacteria (52).    USE - Method for producing marsh gas (claimed).    DETAILED DESCRIPTION - Producing marsh gas involves pouring fermentation raw material into feedstock tube. Inner annular pipe and multiple fermentation zone inside the tubes produces different amounts of marsh gas. Air pressure promotes large fermentation area and generates a large area full of fermented marsh gas. The continue fermentation of marsh gas does not fill the fermentation zone. The marsh gas is produced within the inner annular pipe. The marsh gas will ferment within the pipeline and then squeezed to the feedstock tube and discharging pipe. The pipeline has cloth bacteria. The obtained material is first passed through the discharge pipe by one-way flow and then into drain water. The pressure between liquid slurry is increased in tube of lowest position of storage device. The fermented material is flowed by pressure inside the pipeline having cloth bacteria. The external output of marsh gas from the top of the fermentation zone reduces pressure of the fermentation zone. The fermentation zone with high pressure delivers marsh gas. The marsh gas slurry stored in pressure between the cloth bacteria and the feedstock tube is drained into pipeline through reflux. The refluxed marsh gas is supplemented into the fermentation zone. The rest area of fermentation zone store the marsh gas. The production of marsh gas is stopped and methane is used.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of marsh gas production system    Feedstock tube (10)    Discharge pipe (20)    Pipeline (30)    Fermentation zone (40)    Cloth bacteria (52)