Influence of seasonality on the characteristics and biological pre-treatment of landfill leachate
Keywords:
caracterização temporal, lagoas anaeróbia e aerada, geração de lixiviadoAbstract
Factors such as climate, waste characteristics, age and operation of the landfill influence the flow and composition of landfill leachate, which must be monitored as they interfere with the treatment process. Although anaerobic and aerated lagoons are unable to bring the treated leachate into line with release standards, they function as pre-treatment and amortise its variability, preparing it for post-treatment. This study assessed the influence of seasonality on the flow, composition and biological pre-treatment of leachate generated in a landfill in a tropical region, by means of physico-chemical and flow analyses of the raw and pre-treated leachate. The influence of precipitation on the increase in flow and the variability of COD and BOD was confirmed5,20. Pre-treatment removed 60.8% and 36.6% of COD; 74.7% and 79.4% of BOD5.20, and 94.6% and 76.8% of N-NH4, respectively, in the dry and rainy seasons, but with remaining concentrations still high for direct use in post-treatment.
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