Engineering design of sewage sludge pump-pipeline systems in WWTP of Brno

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Engineering design of sewage sludge pump-pipeline systems in WWTP of Brno

Popis výsledku v původním jazyce

The Wastewater Treatment Plant (WWTP) in the city of Brno is the second largest in the Czech Republic. A recent engineering design project focused on a major reconstruction of its sewage sludge transport technology. This undertaking required an innovative approach based on reliable input parameters, particularly those derived from hydraulic calculations for sludge pump-pipeline systems. These calculations needed to be supported by detailed knowledge of the rheological behaviour of various types of pumped sewage sludge. This paper presents the measured rheological parameters of different sludge types and examines their influence on key aspects of the transport system design. Rheological properties of primary and secondary thickened sludges, mixed sludge, and digested sludge were obtained through laboratory tests using a rotational viscometer. The sludges were found to exhibit Herschel-Bulkley behaviour, with rheological parameters varying with the total solids concentration, which ranged from 4% to 7% by mass. The engineering design addressed several critical components, including the determination of flow regime, prediction of the system curve, and selection of optimal operating points for pumps as part of the overall pump-pipeline system configuration. Additionally, the paper discusses the role of friction and local losses in shaping the final design. A detailed case study of a selected pump-pipeline system transporting mixed sludge is also provided.

Název v anglickém jazyce

Engineering design of sewage sludge pump-pipeline systems in WWTP of Brno

Popis výsledku anglicky

The Wastewater Treatment Plant (WWTP) in the city of Brno is the second largest in the Czech Republic. A recent engineering design project focused on a major reconstruction of its sewage sludge transport technology. This undertaking required an innovative approach based on reliable input parameters, particularly those derived from hydraulic calculations for sludge pump-pipeline systems. These calculations needed to be supported by detailed knowledge of the rheological behaviour of various types of pumped sewage sludge. This paper presents the measured rheological parameters of different sludge types and examines their influence on key aspects of the transport system design. Rheological properties of primary and secondary thickened sludges, mixed sludge, and digested sludge were obtained through laboratory tests using a rotational viscometer. The sludges were found to exhibit Herschel-Bulkley behaviour, with rheological parameters varying with the total solids concentration, which ranged from 4% to 7% by mass. The engineering design addressed several critical components, including the determination of flow regime, prediction of the system curve, and selection of optimal operating points for pumps as part of the overall pump-pipeline system configuration. Additionally, the paper discusses the role of friction and local losses in shaping the final design. A detailed case study of a selected pump-pipeline system transporting mixed sludge is also provided.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the 22nd International Conference on HYDROTRANSPORT

ISBN

978-80-01-07404-6

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

212-219

Název nakladatele

CESKE VYSOKE UCENI TECHNICKE V PRAZE

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

27. 5. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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