Journals / Uludağ Üniversitesi Mühendislik Fakültesi Dergisi / 2018 / Cilt: 23 - Sayı: 1

Optimization of Struvite Precipitation for Landfill Leachate Treatment

SIZINTI SUYU ARITIMINDA STRÜVİT ÇÖKTÜRME OPTİMİZASYONU

Pages
65–76
DOI
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AI Summary & Key Takeaways

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

And also, RSM can be used to optimize required ammonium removal efficiency for lower Mg/N and N/P molar ratio which affects the performance of pretreatment method that designed for an anaerobic process having 300:5:1 ratio for COD/N/P.

📌 3 Key Takeaways

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Objective & Hypothesis:Sanitary landfill is the most preferred municipal solid waste disposal method.
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Key Findings & Data:Optimum struvite precipitation conditions were determined based upon 11 runs performed in CCD.
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Conclusion & Impact:And also, RSM can be used to optimize required ammonium removal efficiency for lower Mg/N and N/P molar ratio which affects the performance of pretreatment method that designed for an anaerobic process having 300:5:1 ratio for COD/N/P.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Merkezi Kompozit Tasarım (MKT) · Düzenli depolama · Sızıntı suyu

Abstract

Sanitary landfill is the most preferred municipal solid waste disposal method. The production of highly polluted leachate is a major disadvantage of sanitary landfills. In this study, optimization of struvite precipitation to remove ammonium from landfill leachate was conducted by using Response Surface Methodology (RSM) and Central Composite Design (CCD). Optimum struvite precipitation conditions were determined based upon 11 runs performed in CCD. A second-order polynomial functional model was fitted well to the results. The statistical analysis showed that two independent variables which are molar rates of Mg/N and N/P had significant effects on the ammonium removal efficiency. Maximum ammonium removal efficiency was 99.8% at a molar rate of 1.20 for Mg/N and 1.27 for N/P for a constant 9.2 pH value. The obtained results revealed that struvite used as pretreatment in anaerobic process can be modelled by using RSM. And also, RSM can be used to optimize required ammonium removal efficiency for lower Mg/N and N/P molar ratio which affects the performance of pretreatment method that designed for an anaerobic process having 300:5:1 ratio for COD/N/P.

Özet

Evsel katı atıkların bertarafında düzenli depolama yöntemi sıklıkla tercih edilmektedir. Çok kirli sızıntı suyu oluşumu, düzenli depolama tesislerinin en önemli dezavantajıdır. Bu çalışmada, Cevap Yüzey Yöntemi ve Merkezi Kompozit Tasarımı kullanılarak sızıntı suyundan amonyum giderimine yönelik strüvit çöktürme optimizasyonu yapılmıştır. Optimum strüvit çöktürme şartlarının belirlenmesi için 11 adet deneysel çalışma yapılmıştır. Sonuçlar ikinci dereceden polinom fonksiyonel model ile iyi uyum göstermiştir. İstatistiki analizler, Mg/N ve N/P molar oranı bağımsız değişkenlerinin amonyum giderim verimi üzerine önemli etkisinin olduğunu ortaya koymuştur. En yüksek amonyum giderim verimine %99,8 olarak; 9,2 sabit pH değerinde, Mg/N için 1,2 ve N/P için 1,27 molar oranlarında ulaşılmıştır. Elde edilen sonuçlar, anaerobik proseste ön arıtım olarak kullanılan strüvitin Cevap Yüzey Yöntemi kullanılarak modellenebildiğini ortaya koymuştur. Ayrıca Cevap Yüzey Yöntemi; KOİ/N/P için 300:5:1 oranına sahip bir anaerobik proses için tasarlanmış olan ön arıtım performansını etkileyen daha düşük Mg/N ve N/P molar oranı için gerekli amonyum giderme verimliliğini optimize etmek için kullanılabilir.

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Cite This Article

DOĞAN, S., AYGÜN, A., ARGUN, M. E., ESMERAY, E. (2018). Optimization of Struvite Precipitation for Landfill Leachate Treatment. Uludağ Üniversitesi Mühendislik Fakültesi Dergisi, Cilt: 23 - Sayı: 1, 65–76. https://ajindex.com/articles/329999

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