Identifying surface formation and adhesion mechanisms of FOG deposits on sewer lines.

Fat, oil, and grease (FOG) deposits contribute to 25 % of Sanitary Sewer Overflows (SSOs) in the U.S. and is exacerbated by the aging sewer infrastructure.

Reducing fat, oil, and grease (FOG) deposits formation and adhesion on sewer collection system structures through the use of fly ash replaced cement-based materials.

The accumulation of fat, oil, and grease (FOG) deposits in sewer pipes reduces their conveyance and results in Sanitary Sewer Overflows (SSOs). Previous research has shown that concrete used in sewer lines is a significant source for calcium ion, which participates in the FOG deposit formation mechanism. However, no research has been conducted to understand the effect of calcium leaching from cement on FOG deposits formation and adhesion.