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An Integrated Approach to the Biological Reactor–Sedimentation Tank System

Department of Civil, Building and Environmental Engineering (DICEA), Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
Department of Theoretical and Applied Sciences (DISTA), University of Insubria, Varese, Via G.B. Vico 46, 21100 Varese, Italy
Author to whom correspondence should be addressed.
Resources 2019, 8(2), 94;
Received: 20 April 2019 / Revised: 8 May 2019 / Accepted: 9 May 2019 / Published: 14 May 2019
PDF [5575 KB, uploaded 14 May 2019]


Secondary clarifiers are demanded to separate solids created in activated sludge biological processes to achieve both a clarified effluent and to manage the biological processes itself. Indeed, the biological process may influence the sludge characteristics, and conversely, the settling efficiency of the sedimentation basin plays an important role on the biological process in the activated sludge system. The proposed model represents a tool for better addressing the design and management of activated sludge system in wastewater treatment plants. The aim is to develop a numerical model which takes into account both the conditions in the biological reactor and the sludge characteristics coupled to the hydrodynamic behavior of a clarifier tank. The obtained results show that the different conditions in the reactor exert a great influence on the sedimentation efficiency. View Full-Text
Keywords: activate sludge; numerical model; secondary clarifier; treatment efficiency activate sludge; numerical model; secondary clarifier; treatment efficiency

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Conserva, S.; Tatti, F.; Torretta, V.; Ferronato, N.; Viotti, P. An Integrated Approach to the Biological Reactor–Sedimentation Tank System. Resources 2019, 8, 94.

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