Combined type methane generator

A combined mesh gas generation device comprises a monomer tank provided with a manhole and a manhole cover plate, a material inlet and a material outlet. The technical proposal of the utility model can be boiled down as follows: at least two monomer tanks which are same in structure and communicated with each other are connected with one another in series; the material inlet is communicated with the middle part or the upper part of one of the monomer tanks; the material outlet is communicated with the lower part of the other monomer tank; and two mesh gas conducts which are communicated with each other and communicated with gas supported facilities are arranged on the manhole cover plates of the monomer tanks respectively. Connected in a combined manner, the utility model is very simple to manufacture and convenient to transport; meanwhile, the number of the combinations can be adjusted as required; and by adopting the process and materials for the production of a small fermentation tank, the utility model ca