The main goal of the work developed is to present the results from a set of studies conducted in different regions of Portugal where a conceptual model of sludge management was applied. In order to achieve the objective of the use of organic resources on land, all the partnerships (producers, users, authorities, regulators) should be convince that the sludge/biosolid is safe, sustainable, trusted and welcome. The selection of the use/disposal method or management system was based on technical factors such as, local geography, climate, land use, availability or disposal sites and regulatory constrains, giving also emphasis to the local traditions, personnel experience and public opinion. The wide spread of different WWTP by region in study (size, treatment process and local specific parameters) led us to the construction of hypothetical sludge management scenarios. The decision depends on several factors, namely, economical, environmental, logistical, energy recovery and land use. This tool can be used, not only for the region in study, but also for different municipalities, although it should be adapted to the different “municipality specific” and “site specific” parameters. The results were thoroughly analysed to identify parameters that could have a potential influence on the results.

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