A. Papadopoulos et al., TREATMENT OF STABILIZED LANDFILL LEACHATE BY PHYSICOCHEMICAL AND BIOOXIDATION PROCESSES, Journal of environmental science and health. Part A: Environmental science and engineering, 33(4), 1998, pp. 651-670
In this work the treatment of leachate originating from an old landfil
l was compared using a variety of methods both singularly and in combi
nation. Aerobic biological treatment gave a COD removal ranging from 3
2-35%, but it was very effective for BOD and ammonia removal (97% and
99%, respectively). By using chemical oxidation a COD reduction up to
33% was achieved. The application of chemical precipitation gave a COD
removal in the range of 36-42%. The combination of biological and che
mical oxidation, biological oxidation and chemical precipitation or ch
emical oxidation and chemical precipitation, led to a COD reduction up
to 57%. The best results were obtained when a biological oxidation wa
s applied in two stages combination with chemical oxidation and chemic
al precipitation reducing COD concentration values up to 87%.