US 7,070,693 B2 · Process for treating septage

Abstract

A process and apparatus for the treatment of septage, particularly grease trap waste, is disclosed. The inventive process will convert the septage into Biosolids (sludge) and water dischargeable to the environment. The treated septage achieves pathogen reduction, and reduced vector attraction. Treatment of septage by pasteurization causes the destruction of harmful pathogens. Pasteurization of septage having high water content provides for even temperature elevation and distribution of heat within the thermal mass of the septage allowing for consistent pathogen destruction. An alkaline compound is utilized to form a filter cake from the solids fraction of the pasteurized septage preventing vector attraction, while producing a beneficial bio-solid. The liquid fraction of the septage is treated by biological process allowing for its discharge into the environment.

Claims37

Dependent claims

A method for treating septage to produce a biosolid and dischargeable water from said septage comprising the following steps:

providing septage having a liquid component and a solid component;
pasteurizing said septage, wherein said pasteurization substantially reduces pathogens within said septage;
adding an alkaline compound to said pasteurized septage wherein said alkaline compound elevates the pH of said septage thereby reducing the attraction of said septage to vectors;
and
pressing said alkaline conditioned septage in a filter press producing a biosolid, and filter press filtrate, wherein said biosolid is removed from said treatment process and said filter press filtrate is discharged.

2 more elements

Dependencies are inferred from the claim text.

Process for treating septage

Life of this patent

Process for treating septage

Life of this patent

Abstract

Claims37