The reuse of fecal sludge is a crucial and final step in the FSM (Fecal Sludge Management) value chain, as it seeks to utilize waste products for beneficial purposes and promote sustainability in FSM practices while ensuring safe disposal. Scientists have long pursued various approaches to close the loop in the FSM value chain; however, only limited options are currently available for generating value from fecal sludge.
This study proposes an innovative approach to utilizing fecal sludge for the production of bio-asphalt through Hydrothermal Liquefaction (HTL). It explores how waste materials, combined with natural clay catalysts, can be converted into bio-asphalt. The research further investigates the impact of metal oxides from different catalysts on the process, particularly in producing bio-crude and asphaltene. Bio-asphalt offers a green and cost-effective alternative to traditional petroleum-based asphalt. Leveraging fecal sludge for bio-asphalt production can accelerate progress toward achieving Sustainable Development Goal (SDG) targets 6.2 and 11.6, which emphasize safely managed sanitation and sustainable urban development.
The findings of this research pave the way for the production of environmentally friendly bio-asphalt from fecal sludge and solid waste. This study has the potential to inspire further exploration of innovative fecal sludge and solid waste management technologies by transforming waste materials into valuable products, thereby contributing to the development of a circular economy.
