Carbon Science Solutions LLC (CSS) is a startup concentrating on using liquid waste (or "stillage") that remains after ethanol distillation as an admixture in mortar and concrete in order to improve the workability of fresh concrete and to modify the properties of the hardened mortar and concrete.
We have partnered with the Center for Applied Energy Research (CAER) at the University of Kentucky (UKY) on these efforts, focusing particularly, given its importance in the State's economy, as they relate to the production of bourbon and rye whiskeys.
CSS has an option agreement for an exclusive license with UKY that covers [two] issued patents and a pending patent. The pending patent covers the use of stillage as described above.
Stillage is readily available (likely for little or no charge) from distilleries. In Kentucky, for example, the cost of disposing of stillage by traditional methods has increased dramatically, particularly with the bourbon industry booming, and the cost of alternative methods of disposal or use of the waste are also expensive (prohibitively, in many cases) and, in some cases, environmentally harmful.
The use of stillage liquid as an admixture has high impact potential on both the bourbon industry and the ready-mix concrete industry. This is accomplished by not only providing a solution for a growing concern about waste disposal from the bourbon industry but also providing a highly unique and "green" no-chemical approach to concrete admixtures. We estimate that this technology has the capability of producing up to 30 percent less CO2 footprint (based on groundwater as the source of the water in the mixture) as compared to traditional methods.
Our data, which has been supported by testing data from two U.S. concrete producers, indicates that using bourbon stillage liquids in a cementitious system, as an admixture, can impart increased strength performance, provide significant water-reducing properties, improve concrete rheology and the potential to delay strength development [if high concentrations of stillage liquid are added (up to full replacement of standard, tap, mixing water)]. Significantly, less water is required to provide the desired flow and workability to the mortar and cement.