The percentages of red clay and black clay kept their constant level 50 and 25%, respectively. Sludge samples were taken, which are typical in winter season rainy periods and summer season dry period by executing ten repetitions per sample.
Los porcentajes de arcilla roja y arcilla negra se mantuvieron constantes 50 y 25% respectivamente y se tomaron muestras de lodos características de períodos climáticos invierno periodo lluviosos y verano periodo seco, realizando diez repeticiones por muestra.