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The development of Smart City systems and infrastructure should provide an implementation of assumptions for harmonious and sustainable development of urban areas. Implementation of Smart City assumptions within the city structure is related to introduction and development of passive and inert infrastructure that constitutes elements of the city infrastructure, as well as particular form of development of areas and buildings. The following research work concerns an analysis of spatial and infrastructure-related solutions as well as environmental, social and ICT systems applied within the city. Source material analyses (urban, architectural and technological sources) provide the basis for conclusions and formulation of typology and implementation of criteria for smart urban, social and ecosystem-related infrastructure implemented in the Smart City model, with the use of innovations in the field of intelligent information and communication technologies (ICT) as well as network infrastructure. The conclusions derived from the following research work contribute to the discussion on ways to shape the structure of infrastructure and nodal points in the Smart City development model in relation to sustainable development issues.

This paper presents the results of research on the granulation process of leather industry waste, i.e., tanning shavings. It is economically justified to granulate this waste together with mineral additives that are useful in the processes of their further processing. Unfortunately, the granulation of raw, unsorted shavings does not obtain desired results due to their unusual properties. In this study, the possibilities of agglomeration of this waste were examined by a new method consisting of the production and then the granulation of wet pulp. During granulation, no additional binding liquid is added to the granulated bed. As part of this work, the specific surface of granulated shavings, the granulometric composition of the obtained agglomerates, and their strength parameters were determined. The use of a vibrating disc granulator, the addition of a water glass solution (in the pulp), dolomite, and gypsum made it possible to obtain durable, mechanically stable granules.