Design of a UASB reactor for the treatment of landfill domestic waste leachate
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A wastewater treatment system was designed for leachate degradation; the main components of the system were UASB reactors. Degradation was performed in a pilot plant reactor which required 35 days to reach an optimal temperature between 35 and 45 °C. Moreover, pH was maintained between 8,3 and 8,77. The chloride content increased from 2013,56 to 2902,17 mg/L and alkalinity varied from 4100 mg/L to 5546,67 mg/L. Meanwhile, ammoniacal nitrogen, biological oxygen demand and chemical oxygen demand contents decrease by 86,30%, 83,73%, and 74,97%, respectively. After 5 days of treatment, further degradation in the reactor was not significant, therefore, this time period was established as a maximum prior to recirculation. Based on these results, the treatment system was designed for a leachate capacity of 56,75 m3/day which would be transported by a pump of ½ hp and 110V with a flow of 5-25 L/min. In addition, the leachate would be treated in 4 UASB reactors of 17,64 m3 and 321,05 kg of capacity each; the feed and products of these reactors would be stored in tanks of 62,40 m3.
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