Os classificadores de areia, ou parafusos de areia, são utilizados em estações de tratamento de águas residuais na fase de pré-tratamento.

To profiling activities:
i.e. the elaboration and processing of data by API Spa for the purposes of profiling referred to in point c) of these guidelines, relating - by way of example and not exhaustive - to consumption and other habits, behaviour, consultation and use of the website.

To communication to third parties for marketing purposes:
i.e. the communication of data to companies connected to API Spa, as well as to partner companies of the same, which will be able to process them for the marketing purposes referred to in point d) of these guidelines, via the foreseen processing methods, i.e. paper-based, via automated and telematic means, by ordinary or electronic mail, telephone and any other computerised means.