Improving wastewater treatment plant performance by applying CFD models for design and operation: selected case studies

Hydrodynamic simulation (CFD: computational fluid dynamics) is one of the major tools for planning the reconstruction and operation of the structures in wastewater treatment plants, and its routine use is commonplace because of the cost savings and efficiency gains that can be achieved. This paper p...

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Autor principal:	M. Patziger
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	aeration grit chambers mixing operation return sludge control water resources recovery Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/651460231bb84d27ada4aca1a5eef0e0
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spelling	oai:doaj.org-article:651460231bb84d27ada4aca1a5eef0e02021-11-06T11:13:40ZImproving wastewater treatment plant performance by applying CFD models for design and operation: selected case studies0273-12231996-973210.2166/wst.2021.019https://doaj.org/article/651460231bb84d27ada4aca1a5eef0e02021-07-01T00:00:00Zhttp://wst.iwaponline.com/content/84/2/323https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Hydrodynamic simulation (CFD: computational fluid dynamics) is one of the major tools for planning the reconstruction and operation of the structures in wastewater treatment plants, and its routine use is commonplace because of the cost savings and efficiency gains that can be achieved. This paper provides examples of how CFD can contribute to substantial improvements in the overall efficiency of wastewater treatment plants.The case studies presented in the paper include rarely investigated issues, such as the operation of aerated grit chambers, performance of primary settling tanks, mixing performance in oxidation ditches and return sludge control. The results show that: (1) air intake rate can be strongly decreased in most of the grit chambers, (2) optimization of the inlet geometry design of primary settling tanks is crucial, especially at high loads caused by storm events, (3) mixer performance design based on current design guidelines is often of an unnecessarily high capacity, (4) sludge recirculation rate should be optimized by CFD investigations based on secondary settling tank performance. HIGHLIGHTS Results of little-investigated processes are shown in the paper.; Air intake rate can be strongly decreased in most of the grit chambers.; Optimizing primary settling tank performance leads to an enhanced removal efficiency, especially at high load (for example, storm events).; Grit chambers, primary settling, mixing and return sludge control should always be optimized by computational flow dynamics (CFD) simulations.;M. PatzigerIWA Publishingarticleaerationgrit chambersmixingoperationreturn sludge controlwater resources recoveryEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 84, Iss 2, Pp 323-332 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	aeration grit chambers mixing operation return sludge control water resources recovery Environmental technology. Sanitary engineering TD1-1066
spellingShingle	aeration grit chambers mixing operation return sludge control water resources recovery Environmental technology. Sanitary engineering TD1-1066 M. Patziger Improving wastewater treatment plant performance by applying CFD models for design and operation: selected case studies
description	Hydrodynamic simulation (CFD: computational fluid dynamics) is one of the major tools for planning the reconstruction and operation of the structures in wastewater treatment plants, and its routine use is commonplace because of the cost savings and efficiency gains that can be achieved. This paper provides examples of how CFD can contribute to substantial improvements in the overall efficiency of wastewater treatment plants.The case studies presented in the paper include rarely investigated issues, such as the operation of aerated grit chambers, performance of primary settling tanks, mixing performance in oxidation ditches and return sludge control. The results show that: (1) air intake rate can be strongly decreased in most of the grit chambers, (2) optimization of the inlet geometry design of primary settling tanks is crucial, especially at high loads caused by storm events, (3) mixer performance design based on current design guidelines is often of an unnecessarily high capacity, (4) sludge recirculation rate should be optimized by CFD investigations based on secondary settling tank performance. HIGHLIGHTS Results of little-investigated processes are shown in the paper.; Air intake rate can be strongly decreased in most of the grit chambers.; Optimizing primary settling tank performance leads to an enhanced removal efficiency, especially at high load (for example, storm events).; Grit chambers, primary settling, mixing and return sludge control should always be optimized by computational flow dynamics (CFD) simulations.;
format	article
author	M. Patziger
author_facet	M. Patziger
author_sort	M. Patziger
title	Improving wastewater treatment plant performance by applying CFD models for design and operation: selected case studies
title_short	Improving wastewater treatment plant performance by applying CFD models for design and operation: selected case studies
title_full	Improving wastewater treatment plant performance by applying CFD models for design and operation: selected case studies
title_fullStr	Improving wastewater treatment plant performance by applying CFD models for design and operation: selected case studies
title_full_unstemmed	Improving wastewater treatment plant performance by applying CFD models for design and operation: selected case studies
title_sort	improving wastewater treatment plant performance by applying cfd models for design and operation: selected case studies
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/651460231bb84d27ada4aca1a5eef0e0
work_keys_str_mv	AT mpatziger improvingwastewatertreatmentplantperformancebyapplyingcfdmodelsfordesignandoperationselectedcasestudies
_version_	1718443734877601792

Improving wastewater treatment plant performance by applying CFD models for design and operation: selected case studies

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