Research into the influence of vertical drainage elements on the operational efficiency of rapid filters

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.123559

Keywords:

rapid filter, vertical drainage element, porous fibrous shell

Abstract

To improve the efficiency of removal of suspended solids at rapid filters, we designed improved structure of the device. The improvement is based on the application, simultaneously with a granular filter layer, of vertical drainage elements with porous fibrous shells. Such a solution makes it possible to shift part of the load to the shells of drainage elements, reduce colmatation and head losses in a granular filter layer, as well as to more evenly distribute contaminants along its height. This increases the duration of operation of the filter under filtering mode and brings down the cost of regeneration of a filter layer. A filtration equation was derived to describe parallel filtration of a low-concentrated suspension through a granular medium and a fibrous medium. The mathematical model also includes equations of mass transfer, mass exchange and dependences to account for the impact of colmatation and parameters of filtering media. For a granular filter layer, we considered filtering with a gradual blocking of pores; for a porous shell ‒ the formation of a sediment layer at its surface. Using a mathematical model, we conducted numerical experiments. The following significant parameters for the filter with improved design were determined: equivalent diameter of particles in a filter layer, working height of the vertical drainage element, duration of washing a porous fibrous shell. We give examples of calculations for determining the values of basic parameters at which the effectiveness of application of vertical drainage elements is maximal

Author Biographies

Stepan Epoyan, Kharkiv National University of Civil Engineering and Architecture Sumska str., 40, Kharkiv, Ukraine, 61002

Doctor of Technical Science, Professor, Head of Department

Department of Water Supply, Sewage and Hydraulics

Andrey Karahiaur, Kharkiv National University of Civil Engineering and Architecture Sumska str., 40, Kharkiv, Ukraine, 61002

Doctor of Technical Science, Associate Professor

Department of Water Supply, Sewage and Hydraulics

Vladlen Volkov, Kharkiv National University of Civil Engineering and Architecture Sumska str., 40, Kharkiv, Ukraine, 61002

Postgraduate student

Department of Water Supply, Sewage and Hydraulics

Svetlana Babenko, Kharkiv National University of Civil Engineering and Architecture Sumska str., 40, Kharkiv, Ukraine, 61002

PhD, Associate Professor

Department of Water Supply, Sewage and Hydraulics

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Published

2018-02-14

How to Cite

Epoyan, S., Karahiaur, A., Volkov, V., & Babenko, S. (2018). Research into the influence of vertical drainage elements on the operational efficiency of rapid filters. Eastern-European Journal of Enterprise Technologies, 1(10 (91), 62–69. https://doi.org/10.15587/1729-4061.2018.123559

Issue

Vol. 1 No. 10 (91) (2018): Ecology

Section

Ecology

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Copyright (c) 2018 Stepan Epoyan, Andrey Karahiaur, Vladlen Volkov, Svetlana Babenko

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