Sustainable procedures for sludge/biosolids management require the development of strategies to reduce the amount of sludge to be handled and to produce higher quality biosolids. Therefore, realistic and enforceable regulations adapted to local situations must be developed, defined outlet procedures established and good quality products guaranteed. To this end, the definition of standardized characterization procedures and guidelines for good practices becomes a necessary support to regulations. To contribute to the development of the EU directives dealing with sludge, the European Committee for Standardization (CEN) has established Technical Committee 308 (TC 308) whose scope is the standardization of methods for sludge characterization and the production of guidelines of good practice. In this paper, the most recent developments of the CEN/TC 308 work for the chemical, biological and physical characterization of sludge/biosolids are discussed in relation to the main different treatment and outlet options.

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