Impact of waste segregation on leachate characteristics in semi-aerobic landfills: a pilot-scale evaluation for sustainable waste management

Reyes B.; Requena N.; Díaz L.F.; Schalch V. · Waste Management (2026) · DOI: 10.1016/j.wasman.2026.115750

Resumen

This study evaluates the effects of different residual waste compositions, derived from simulated material recovery scenarios, on leachate quality and waste stabilization in pilot-scale semi-aerobic landfills. Unlike previous studies that examined semi-aerobic landfill performance using waste streams with fixed compositions, this study investigates how waste segregation-driven changes in residual waste composition affect leachate characteristics. Three bioreactors representing recovery levels of 0%, 25%, and 50% were operated using municipal solid waste from Lima, Peru, and monitored over an 18-week period. Key physical and chemical parameters—such as temperature, settlement, pH, conductivity, BOD5, COD, total solids, and volatile solids—were monitored. Results showed that while segregation did not significantly affect organic load parameters or conductivity, it contributed to lower turbidity levels. The findings demonstrate that semi-aerobic landfill performance remained robust across different residual waste compositions while providing novel pilot-scale evidence on the relationship between waste segregation and leachate quality. This study addresses a knowledge gap relevant to regions undergoing transitions toward circular economy.

Instituciones: Universidad Nacional de Ingeniería