Landfill leachate is a highly polluted type of wastewater that is difficult to treat. Scientists in Egypt used a sequencing batch reactor (SBR) to clean up leachate from two landfills. They tested different treatment cycles and added nanoparticles to improve efficiency. The SBR system alone could treat the leachate, but adding nanoparticles made a big difference. With nanoparticles, the system removed over 99% of pollutants, making the treated leachate safe for restricted irrigation. This study shows that using nanoparticles in SBR systems is a cost-effective and eco-friendly way to clean up landfill leachate.