Assessment of relief chambers in Jindřichův Hradec using the particle tracking method in CFD

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F25%3A00385115" target="_blank" >RIV/68407700:21110/25:00385115 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

čeština

Original language name

Posouzení odlehčovacích komor v Jindřichově Hradci metodou sledování částic v CFD

Original language description

This study presents a CFD-based particle tracking analysis of six combined sewer overflow (CSO) chambers in the city of Jindřichův Hradec (Czech Republic) to evaluate their pollutant retention efficiency. A Lagrangian multiphase approach was used to simulate the transport of solid fractions under various flow conditions. Each overflow event was modeled to determine the distribution of pollutant particles between wastewater treatment plant outflow, internal retention, and discharge to the Vajgar pond. The simulation results were combined with annual overflow volumes and pollutant concentration data to estimate the total annual load of suspended solids (TSS) and chemical oxygen demand (COD) entering the pond. The findings revealed significant differences in performance among the CSOs. Two chambers were responsible for nearly two tonnes of annual pollutant load, highlighting the need for targeted retrofitting of specific structures. The proposed method offers a detailed and site-specific evaluation framework compliant with EU wastewater legislation.

Czech name

Posouzení odlehčovacích komor v Jindřichově Hradci metodou sledování částic v CFD

Czech description

This study presents a CFD-based particle tracking analysis of six combined sewer overflow (CSO) chambers in the city of Jindřichův Hradec (Czech Republic) to evaluate their pollutant retention efficiency. A Lagrangian multiphase approach was used to simulate the transport of solid fractions under various flow conditions. Each overflow event was modeled to determine the distribution of pollutant particles between wastewater treatment plant outflow, internal retention, and discharge to the Vajgar pond. The simulation results were combined with annual overflow volumes and pollutant concentration data to estimate the total annual load of suspended solids (TSS) and chemical oxygen demand (COD) entering the pond. The findings revealed significant differences in performance among the CSOs. Two chambers were responsible for nearly two tonnes of annual pollutant load, highlighting the need for targeted retrofitting of specific structures. The proposed method offers a detailed and site-specific evaluation framework compliant with EU wastewater legislation.

Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20701 - Environmental and geological engineering, geotechnics

Project

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Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2025

Confidentiality

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

Article name in the collection

Sborník příspěvků odborné konference SVK STOKA 2025

ISBN

978-80-01-07434-3

ISSN

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e-ISSN

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Number of pages

9

Pages from-to

43-51

Publisher name

katedra vodního hospodářství obcí

Place of publication

Praha

Event location

Mariánská

Event date

Jun 23, 2025

Type of event by nationality

CST - Celostátní akce

UT code for WoS article

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