Non-sewered sanitation systems offer a viable means of reducing reliance on conventional wastewater infrastructure while improving environmental outcomes. Building on this approach, a novel household-scale toilet system is being developed that separates and treats solid and liquid waste streams within a single integrated unit. The work is being undertaken at Cranfield University with funding from the Gates Foundation under the Reinvented Toilet Challenge and is aligned with ISO 30500 performance requirements. The system is designed to enable contained, on-site treatment processes tailored to solid and liquid waste streams. Solid waste is stabilised through a low-emission torrefaction process to produce a non-pathogenic, carbon-rich material, while the liquid fraction is treated independently to reduce organic load and nutrient concentrations and to achieve non-pathogenic, environmentally acceptable effluent quality. Overall, the proposed non-sewered sanitation concept demonstrates the potential to deliver improved environmental performance, reduced emissions, and enhanced resource management at the household level. The work highlights how integrated, standards-informed sanitation systems could challenge conventional approaches and contribute to future-ready solutions for water and wastewater management.