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[ES] This article carries out a review of the different treatment methods for biosolids obtained in waste water treatment plants. First, processes such as digestion, pasteurisation, drying or composting are addressed, among others, the main objective of which is to stabilise sludge for subsequent use. Secondly, methods aimed at eliminating organic matter as much as possible, such as aqueous oxidation and incineration, are described. Data on treatment and destination of biosolids obtained from a survey carried out in different Spanish WWTP are presented in the final part. Mahamud, M.; Gutiérrez, A.; Sastre, H. (1996). Biosolids generated from water purification: (II). Methods of treatment. Water engineering. 3 (3): 45-54. https://doi.org/10.4995/ia.1996.2703 Amorena Udabe, A. (1994), Agricultural valorisation of purification plants in the Pamplona district. Technical Days: Biosolids and purified water as Resources. R. Mujeriego and L. Sala (Eds.). PAG 53-66. Sant Feliu de Guísols, Gerona. Arbiol, M. (1994), Composting of Gardinería and Fangos de Depuradora Biosolids in Castelldefels. Technical Days: Biosolids and Water purified as Resources. R. Mujeriego and L. Sala (Eds.). PAG 75-88. Sant Feliu de Guísols, Gerona. Basteron, R.K. (1994), United States Regulations and Practical Experience on Biosolids Reuse and Disposal, Technical Days: Biosolids and Water purified as Resources. R. Mujeriego and L. Sala (Eds.). PAG 169-192. Sant Feliu de Guísols, Gerona. Chains, A., Cañellas, N., Amengual, A., Calafat, J. (1993), Lode Composting Experimental Plant, Chemical Engineering. 104-106, June 1993. Caus Pía, J.M., Amengual Vich, A. and Cañellas Serrano, N. (1994), Composting and Reuse of Biosolids in Agriculture: The Felanitx case in Mallorca. Technical Days: Biosolids and purified water as Resources. R. Mujeriego and L. Sala (Eds.). PAG 67-74. Sant Feliu de Guísols, Gerona. Fuchs, L., Schwinning, H. (1993), Aeróbic thermophilic digestion. An Economic Process for Low Processing, Water Technology. 109, 47-50. García Ramos, ...