INFORMATION SYSTEMS AND LOGISTICS IN CIVIL ENGINEERING

MATHEMATICAL SIMULATION OF MASS TRANSFER IN THE VERTICAL SETTLER

Vestnik MGSU 8/2013
  • Belyaev Nikolay Nikolaevich - Prydneprovsk State Academy of Civil Engineering and Architecture (PSACEA) Doctor of Technical Sciences, Associate Professor, Department of Hydraulics, Prydneprovsk State Academy of Civil Engineering and Architecture (PSACEA), 24a Chernyshevskiy St., Dnepropetrovsk, 49600, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Nagornaya Elena Konstantinovna - Prydneprovsk State Academy of Civil Engineering and Architecture (PSACEA) assistant lecturer, Department of Hydraulics, Prydneprovsk State Academy of Civil Engineering and Architecture (PSACEA), 24a Chernyshevskiy St., Dnepropetrovsk, 49600, Ukraine; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 150-157

Mathematical models of secondary settlers have been intensively developed in the past several years. The challenge is to develop CFD models capable of taking account of the geometrical shape of the settler, the most important physical processes, and to perform calculations in the timely manner. The task of the authors was to develop a 2D numerical model designated for the research into the transfer of waste waters inside vertical settlers, for the model to take account of the geometrical shape and structural features of the settler. The authors employed finite difference schemes as the basic methods of research. As a result, a new 2D CFD model was developed. The novel model may be used to perform CFD studies of vertical settlers. This model takes account of the geometrical shape of the settler, the central pipe inside it, and other peculiarities. The CFD model and code developed by the authors constitute a solution to multi-parametric problems of the vertical settler design. Computer time taken by this model is equal to the one of a 1D model.

DOI: 10.22227/1997-0935.2013.8.150-157

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INVESTIGATION OF SEDIMENTATION PROPERTIES OF SLUDGE LIQUOR AT WASTEWATER TREATMENT PLANTS

Vestnik MGSU 5/2018 Volume 13
  • Kulakov Artem Alekseevich - Vologda State University (VoGU) Candidate of Technical Sciences, Associate Professor of the Department of Water supply and Waste Water Treatment, Vologda State University (VoGU), 15 Lenina str., Vologda, 160000, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Makisha Nikolay Alekseevich - Moscow State University of Civil Engineering (National Research University) (MGSU) Candidate of Technical Sciences, Associate Professor of the Department of Water Supply and Waste Water Treatment, Director of Education and Research Centre of Water Supply and Waste Water Treatment, Moscow State University of Civil Engineering (National Research University) (MGSU), 26 Yaroslavskoe shosse, Moscow, 129337, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Shafigullina Alin Faritovna - Vologda Research Center of the Russian Academy of Sciences (VolSC RAS) Postgraduate Student, Vologda Research Center of the Russian Academy of Sciences (VolSC RAS), 56a Gorkogo str., Vologda, 160014, Russian Federation; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .
  • Harder Raimo - Bauhaus-university Weimar Diplom-Ingenieur, Lecturer, Transport System Planning Department, Bauhaus-university Weimar, 13 Marienstrasse, Weimar, Germany; This e-mail address is being protected from spambots. You need JavaScript enabled to view it .

Pages 643-650

Subject: the article focuses on investigation of kinetics of sludge liquor sedimentation and on determination of its characteristics; the relations between parameters of activated sludge such as mixed liquor suspended solids (MLSS), sludge-water phase boundary and sedimentation rate are highlighted. Research objectives: research on kinetics and parameters of activated sludge sedimentation at city wastewater treatment plants (WWTP). Materials and methods: field tests of sedimentation process of real sludge samples from different WWTP in laboratory cylinders are conducted, mathematical and graphical processing of the obtained results is carried out. Results: kinetics of sedimentation of sludge liquor with MLSS equal to 0.6…6.2 mg/l is described, main dependencies between sedimentation characteristics of activated sludge are obtained. The regularities of sedimentation of sludge with small and large MLSS are noted. Conclusions: kinetics of sludge sedimentation for various MLSS is determined, the rate of elimination of “sludge-water” phase boundary is determined.

DOI: 10.22227/1997-0935.2018.5.643-650

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