BioSmart – Soluções Ambientais, of the NOV Ambiente e Energia Group, has already started work to remove sludge from 33 WWTP – Wastewater Treatment Station lagoons at the request of Águas Públicas do Alentejo, S.A. (AgdA), a project budgeted at 1.4 million euros. In total, it is estimated that 24,350 tons of sludge will be removed, 6,360 using a raft and 17,990 using a rotary.

The identified WWTP are located in the 13 member municipalities of the AgdA: Aljustrel, Arraiolos, Barrancos, Beja, Castro Verde, Cuba, Mértola, Odemira, Santiago do Cacém, Serpa, Vendas Novas, Viana do Alentejo and Vidigueira. The provision of services has a maximum period of three years.

Seven of the 33 lagoons are cleaned using a raft, with pumping for sludge suction and drying in a mobile dehydration unit; and the remaining 26 using mechanical means in rotating mode, with a toothless cleaning bucket and rubber caterpillars, the sludge being dried by solar dehydration.