Design flows for pressure sewers

• Autorzy: Błażejewski R. , Matz R.
• Języki publikacji: EN

Abstrakty

EN

Existing methods to estimate design flows of sewage in pressure mains have been compared. It was found that the number of simultaneously running identical cavity displacement (grinder) pumps (m out of n), connected to a pressure main is better described by the binomial (for n &le 30) and normal distributions (for n > 30) than by the Poisson probability distribution. A new probabilistic approach to estimate the design flow which takes into account distinguishable (not identical) sources of sewage, disposing to a pressure main, is presented. All possible states of pumps, equal to the number of variations with repetitions, are considered. The method is elaborated for small systems equipped with cavity displacement pumps which have relatively steep characteristic curves. A new formula for the peaking factor, combining averaging over time and over ensemble (number of dwellings) is also presented. The new formula can be applied for individual homes, dwellings in apartment blocks and villages, serving by cavity displacement and/or centrifugal pumps.

Słowa kluczowe

EN

design; buildings; centrifugal pumps; sewage; displacement pumps; sewer; pressure sewer; houses building

PL

projektowanie; domy mieszkalne; pompy odśrodkowe; ścieki; pompy wyporowe; kanał ściekowy; ciśnienie kanalizacyjne

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Environment Protection Engineering
• Rocznik: 2012
• Tom: Vol. 38, nr 2
• Strony: 157--170
• Opis fizyczny: Bibliogr. 21 poz., tab., rys.

Twórcy

autor

Błażejewski R.

• Poznań University of Life Sciences, Department of Hydraulic and Sanitary Engineering, ul. Piątkowska 94, 60-649 Poznań

autor

Matz R.

• Poznań University of Life Sciences, Department of Hydraulic and Sanitary Engineering, ul. Piątkowska 94, 60-649 Poznań

Bibliografia

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