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Journals / Çukurova Üniversitesi Mühendislik-Mimarlik Fakültesi Dergisi / 2007 / Cilt: 22 - Sayı: 2

Investigation of anoxic tank hydraulics by using CFD (Computational fluid dynamics) modelling

HAD (Hesaplamalı Akışkanlar Dinamiği) bilgisayar modellemesi kullanılarak anoksik tank hidroliğinin incelenmesi

Kevser DEMİRÖZ
Fuat BUDAK
Pages
249–260
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The new model formed has 1.1m/s mixer velocity gave the most reasonable results.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:In this study it was investigated that how CFD (Computational Fluid Dynamics) can be helpful in order to improve the design of existing water treatment plants and the process efficiency.
📊
Key Findings & Data:Full scale tracer tests were performed to create Residence Time Distribution Curve (RTD), and results from all models were compared to CFD results. 3 different results were compared; result from simple geometry used in the previous project for CFD, result from improved geometry, inlet profile and mixers (0,55m/s), and result from improved geometry, inlet profile, and mixers (1.1m/s).
💡
Conclusion & Impact:The new model formed has 1.1m/s mixer velocity gave the most reasonable results.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study it was investigated that how CFD (Computational Fluid Dynamics) can be helpful in order to improve the design of existing water treatment plants and the process efficiency. The previous model used in previous project for investigating hydraulic behaviour in denitrifying activated sludge tank at the Rya Wastewater Treatment Plant (WWTP) was improved in terms of geometry, inlet profile, mixers. It was aimed to form a new model which is consistent with the reality. Full scale tracer tests were performed to create Residence Time Distribution Curve (RTD), and results from all models were compared to CFD results. 3 different results were compared; result from simple geometry used in the previous project for CFD, result from improved geometry, inlet profile and mixers (0,55m/s), and result from improved geometry, inlet profile, and mixers (1.1m/s). The new model formed has 1.1m/s mixer velocity gave the most reasonable results.

Özet

Bu çalışmada HAD (Hesaplamalı Akışkanlar Dinamiği) modelinin atık su arıtma sistemlerinde mevcut ekipmanların tasarımının ve sistem çalışma veriminin geliştirilmesindeki uygulanabilirliği araştırılmıştır. Daha önce HAD kullanılarak modellemesi yapılmış ve hidrolik davranışı incelenmiş olan İsveç’in Göteborg şehrinde yer alan atık su arıtma tesisindeki anoksik tank, HAD modeli yardımı ile geometrisi, mikserleri ve giriş profili geliştirilerek gerçek değerlere uyan yeni bir model oluşturulması amaçlanmıştır. Tank üzerinde, hidrolik bekletme zamanı ve dağılımı eğrisi oluşturmak amacıyla yapılan tam ölçekli izleyici testlerinden elde edilen veriler ile modelleme sonuçları karşılaştırılmıştır. İnceleme sonucunda 3 farklı sonuç değerlendirilmiştir. Daha önce kullanılan basit geometriden elde edilen modelleme sonucu ile geometrisi ve giriş profili geliştirilmiş 0.55 m/s ve 1.1 m/s’lik mikser hızlarının kullanıldığı 2 yeni modelleme sonucu, tam ölçekli izleyici testleri sonuçları ile karşılaştırılmıştır. 1.1 m/s hızla çalışan mikserler ile oluşturulan yeni model gerçek değerlere çok yakın sonuçlar vermiştir.

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Cite This Article

DEMİRÖZ, K., BUDAK, F. (2007). Investigation of anoxic tank hydraulics by using CFD (Computational fluid dynamics) modelling. Çukurova Üniversitesi Mühendislik-Mimarlik Fakültesi Dergisi, Cilt: 22 - Sayı: 2, 249–260. https://ajindex.com/articles/350405

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