Sewage sludge (mixture of primary and secondary sludge)Origin: WWTP:
- Typology: Urban;
- Biological treatment: Activated sludge;
- Dehydration system: Centrifuge.
Characteristics: With a moisture content above 80% and not sanitized, it is not suitable for agricultural use.
- Typology: Urban;
- Biological treatment: Activated sludge;
- Dehydration system: Centrifuge.
Characteristics: With a moisture content above 80% and not sanitized, it is not suitable for agricultural use.
Dried sewage sludgeOrigin: Thermal drying of sewage sludge at 100°C in a laboratory oven. Grinding and sieving with 6.3 mm mesh.
Features: With about 30% of moisture content and sanitized, suitable for agricultural use.
Features: With about 30% of moisture content and sanitized, suitable for agricultural use.
Dried sewage sludge with additiveOrigin: Thermal drying of sewage sludge at 100 °C, in a laboratory oven, with prior addition of 0.15 g of dregs / g sludge. Grinding and sieving with 6.3 mm mesh.
Characteristics: With about 30% of moisture content and sanitized, suitable for agricultural use.
Characteristics: With about 30% of moisture content and sanitized, suitable for agricultural use.
CompostOrigin: Sewage sludge composting with wood chips (2:1 v/v, respectively), by means of a longitudinal pile with approximately 3 m3. Final sieving with 6.3 mm mesh.
Commercial organic nitrogen fertilizerOrigin: Fertimax Horse Manure, granulated, with 75% of animal origin and 25% of vegetable origin. Particle size < 6 mm.