Anaerobic-Aerobic Treatment of Municipal Solid Waste Leachate

摘要

This paper describes the organic matter removal from sanitary landfill leachate using an anaerobic reactor an an aerobic one as post-treatment. Average characteristics of the leachate from Montevideo's sanitary landfill are: COD, 18500 mg 1~-1; BOD_5, 10500 mg 1~-1; NH_4-N, 1500 mg 1~-1; P, 17 mg 1~-1; pH, 8.0; Cr, 2.6 mg 1~-1; Fe, 41 mg 1~-1. A system Composed of an anaerobic reactor (UASB) and an aerobic rotating biological contactor (RBC) was tested. The maximum Load for the anaerobic step was 20 kgCOD m~-3 d~-1 kgCOD kgVSS~-1 d~-1) for an HRT of 2 days, with COD removal Efficiencies higher than 80/100.