JOSÉ ÁNGEL SILES LÓPEZ2026-01-292026-01-29201510.1016/j.jenvman.2014.09.0222-s2.0-84908428466https://www.scopus.com/inward/record.uri?eid=2-s2.https://ucocris.uco.es/handle/123456789/25699Environmental EngineeringManagement, Monitoring, Policy and LawWaste Management and DisposalEvaluation of the improvement of sonication pre-treatment in the anaerobic digestion of sewage sludgeresearch article