Patent ID: 7563371
Filing Date: 2009-07-21
Classification: C02F,C12M,Y02E

Abstract:
1. An anaerobic digester apparatus, comprising: a. a hull assembly of at least one tubular section; b. tapered tubular sections at each end of said hull assembly, forming one inlet opening and one outlet opening; c. an injection pump to move feedstock into said inlet opening of said hull assembly; d. a valve located between said injection pump and said inlet opening to prevent said feedstock from flowing back through said inlet opening; e. at least one gas outlet located along the top of said hull assembly that permits the withdrawal of biogas from said hull assembly; f. a regulator for controlling the release pressure of said biogas in said hull assembly; g. an open-ended upwardly inclined pipe connected to said outlet end of said hull assembly, creating a column of said feedstock that pressurizes the contents of said hull assembly, the outlet height of said inclined pipe determining the degree of pressurization of said biogas entrapped in said hull assembly; whereby said feedstock can be biologically acted upon to produce biogas.