2.3. Experimental procedures
Two experiments were carried out in order to assess the viability of the anaerobic process at ambient temperature and when no water is available for manure dilution, like in the area under study. In Parque Porcino de Ventanilla there is a lack of water supply; hence in a real scale digester, pig manure would have to be diluted with urine. In the first experiment, which included the start-up of digesters, pig manure was diluted with water, whereas in the second experiment urine was used instead. Both of them were performed in duplicate and the duration was 80 days.