As a reminder, the RADEEMA solar sewage sludge drying station, which was put into service in May 2018, is a key part of the treatment and recovery process adopted by the major wastewater treatment and reuse project in Marrakech, d 'elsewhere registered by the United Nations (UNFCCC), in 2010, as a CDM project. The first of its kind in Africa and the largest on a global scale, the solar drying unit in Marrakech allows the treatment of more than 200 tonnes per day of sewage sludge, on an area of ​​10 hectares and for an investment of 147 million Dirhams. A pure concentrate of innovation, this plant, through its 40 greenhouses of 1440 m2 each, including 28 greenhouses for solar drying equipped with high-precision equipment for the turning and aeration of sludge, allows to bring to 80% the dryness of the sludge extracted instead of 20% currently recorded on leaving the WWTP and achieving a saving of 5 MW per day of thermal energy.