Methane generation from waste materials

A solid waste digester for generating methane comprising:

• a single phase reactor vessel horizontally disposable on a horizontal around surface within which solid waste is placed, said vessel comprising at least one upright side wall, a floor, and an easily openable entrance for loading, reloading, and unloading the solid waste comprising at least one brace for distributing force for sealing said easily openable entrance via a water seal disposed at said easily openable entrance;
• a cover comprising a liner disposed over said vessel and attached to said brace to seal said vessel;
• said entrance comprising said brace attached to a horizontal upper extension of said cover disposed above said entrance and said water seal attached to a horizontal lower floor extension disposed below said entrance;
• a sprinkler system disposed over the solid waste for distributing water, bacteria, and nutrients over the solid waste;
• and
• a drainage system disposed at a bottom of said vessel for collecting leachate comprising water and bacteria and for sending said leachate through said sprinkler system.