Design of a plant for the treatment of leachate in Sagua la Grande landfill

Abstract

A pollutant present in the landfill of Sagua la Grande is leachate, dark liquids produced by the decomposition of organic matter and the water that draining as a result of rainfall, with high organic load, without receiving adequate treatment. In the work the flow of leachate existing in the landfill was calculated taking as reference the rainy season of the municipality (May-October) with important accumulated the rainfall, two calculation methods were used, the Swiss method and the water balance, As a result, it was obtained that in the Swiss method the leachate flow rate is 0,59 L/sec, while in the water balance the flow rate was 0,58 L/sec, therefore the results in both methods were similar. As an alternative, the primary treatment is proposed, by means of a sand trap with a maximum flow of 4 L/sec, 3,5 m in length and a width of 0,80 m, with a sedimentation rate of 0,030 m / sec, a USAB (Sludge Blanket Anaerobic Up flow) reactor for the treatment Biological , with a height of 4 m, a radius of 1,75 m an volume of 38,48 m3, hydraulic retention time (HRT) of 2,67 hours with hydraulic load of 1,49 m / h, the biological filter with a height of 2,80 m, a width of 1,20 m, for the physical-chemical treatment the drying bed is proposed for the collection of digested sludge with a width of 1,80 m a length of 2,0 m.