The goal of this research was to conduct a life-cycle assessment (LCA) of integrated anaerobic digestion with hydrothermal carbonization (iAD-HTC), a process which uses waste to create renewable energy and materials. HTC can alleviate some issues of digestate management in AD, but it is an energy intensive process. The LCA, which was performed based on literature data, identified areas of improvement in terms of carbon emissions, allowing iAD-HTC to be refined for commercial use.