Co-compostaje con poda de los lodos generados en el Centro de Faenamiento cantón Guaranda-provincia Bolívar.

Abstract

The following investigation´s objetive is to take advantaje of the sludge generated in the Guaranda Canton Faenamiento Center of a technically feasible way by means of the preparation of the co-composting piles and the evaluation the quality of the end product. The treatments were carried out by means of different combinations of raw materials with the following compositions: 30% camal sludge, 20% pruning and 50% sawdust for the pile 1; 30% camal sludge, 15% pruning and 55% sawdust for pile 2; and 30% camal sludge, 10% pruning and 55% sawdust for pile 3. It took daily measurements of temperature and pH of the piles and environmental temperatura. It was evaluated at the beginning, during and at the of the composting process: organic matter, pH, electrical conductivity, and cation exchange capacity, C/N ration and germination index. The final compost evaluated: organic matter, macro and micronutrients and heavy metals, volume contraction, real density, aeration capacity, total porous space, apparent density and wáter retention capacity. Pile 1 had a greated degradation of organic matter than the others, the pH rose in the piles until reaching the optimun comprised between 6.5 and 8.5; the CE ascended gradually. The germination index became > 50%. The CIC increased considerably during the whole process, the C/NT ratios were < 25, the concentration of macro y micronutrientes increased, the maximum concentration of heavy metals was not significant and the optimal parameters suggested by standards. According to the mentioned results above, the 3 compost belong to Class A, being suitable for agriculture use. It recommended to perform other studies with different residues to determine if you get better results.