The agricultural spreading of treated sewage sludge is a valid strategy in terms of circular economy for the management of this nutrient-rich waste. Anaerobic digestion (AD) can be applied to stabilize and hygienize sewage sludge. making it suitable for agricultural reuse. while producing biogas to be utilized as an energy vector. https://countryscenesaddleryandpetsuppliers.shop/product-category/blankets-cutter-roper-style-saddle-pads/