Model-Based investigation of the effects of reactors’ hydraulic retention times on phosphorus removal efficiency in an AO process

Sümeyye Yaşar; Neslihan Manav Demir; Selami Demir

Makale detayları

Model-Based investigation of the effects of reactors’ hydraulic retention times on phosphorus removal efficiency in an AO process

Yazarlar:

Sümeyye Yaşar | Neslihan Manav Demir | Selami Demir

Yayıncı:

Pamukkale University

Ana Başlıklar:

Çevre Mühendisliği (Diğer)

Dergi:

Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.29 Issue 6, pp.636-641

Belge Tipi:

Makale

Yayın Tarihi:

11/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001304202

pISSN:

2147-5881

Anahtar kelimeler:

Özet:

 This study presents the results of a simulation work performed using an activated sludge model to investigate the effects of reactors hydraulic retention times HRT on phosphorus removal in a hypothetical anaerobic-oxic AO process. The simulations were performed for low, medium, and high influent phosphorus loads corresponding to influent CP ratios of 1001.0, 1001.5, 1002.0. For each of influent phosphorus loads, various anaerobic volume fractions AVF between 0.125 and 0.625 were used to test the response of the process that was investigated as a result of the change in hydraulic retention times. Additionally, removal efficiencies for chemical oxygen demand COD, total nitrogen TN, total phosphorus TP, and total suspended solids TSS were also calculated. As a result of the study, maximum COD removal efficiencies for 1002.0, 1001.5 and 1001.0 influent CP ratios were determined as 91.8 for 0.250 AVF for 1002.0 and 1001.5, and 91.7 for both 0.125 and 0.250 AVF, respectively. In all influent CP ratios, the maximum TN removal efficiency was determined as 56.3 at 0.625 AVF, and the maximum TSS removal efficiency was determined as 93.3 at 0.125 AVF. Maximum TP removal efficiencies were determined as 92.8, 90.8 and 86.2 for 1002, 1001.5 and 1001 input CP ratios at 0.375 AVF, respectively. Results showed that total phosphorus TP removal efficiency is determined by both influent CP ratio and AVF in AO process. Of these, the effect of AVF is more prominent. For efficient removal of phosphorus, AVF ratios of 0.25 to 0.375 should be employed.

 This study presents the results of a simulation work performed using an activated sludge model to investigate the effects of reactors hydraulic retention times HRT on phosphorus removal in a hypothetical anaerobic-oxic AO process. The simulations were performed for low, medium, and high influent phosphorus loads corresponding to influent CP ratios of 1001.0, 1001.5, 1002.0. For each of influent phosphorus loads, various anaerobic volume fractions AVF between 0.125 and 0.625 were used to test the response of the process that was investigated as a result of the change in hydraulic retention times. Additionally, removal efficiencies for chemical oxygen demand COD, total nitrogen TN, total phosphorus TP, and total suspended solids TSS were also calculated. As a result of the study, maximum COD removal efficiencies for 1002.0, 1001.5 and 1001.0 influent CP ratios were determined as 91.8 for 0.250 AVF for 1002.0 and 1001.5, and 91.7 for both 0.125 and 0.250 AVF, respectively. In all influent CP ratios, the maximum TN removal efficiency was determined as 56.3 at 0.625 AVF, and the maximum TSS removal efficiency was determined as 93.3 at 0.125 AVF. Maximum TP removal efficiencies were determined as 92.8, 90.8 and 86.2 for 1002, 1001.5 and 1001 input CP ratios at 0.375 AVF, respectively. Results showed that total phosphorus TP removal efficiency is determined by both influent CP ratio and AVF in AO process. Of these, the effect of AVF is more prominent. For efficient removal of phosphorus, AVF ratios of 0.25 to 0.375 should be employed.

 This study presents the results of a simulation work performed using an activated sludge model to investigate the effects of reactors hydraulic retention times HRT on phosphorus removal in a hypothetical anaerobic-oxic AO process. The simulations were performed for low, medium, and high influent phosphorus loads corresponding to influent CP ratios of 1001.0, 1001.5, 1002.0. For each of influent phosphorus loads, various anaerobic volume fractions AVF between 0.125 and 0.625 were used to test the response of the process that was investigated as a result of the change in hydraulic retention times. Additionally, removal efficiencies for chemical oxygen demand COD, total nitrogen TN, total phosphorus TP, and total suspended solids TSS were also calculated. As a result of the study, maximum COD removal efficiencies for 1002.0, 1001.5 and 1001.0 influent CP ratios were determined as 91.8 for 0.250 AVF for 1002.0 and 1001.5, and 91.7 for both 0.125 and 0.250 AVF, respectively. In all influent CP ratios, the maximum TN removal efficiency was determined as 56.3 at 0.625 AVF, and the maximum TSS removal efficiency was determined as 93.3 at 0.125 AVF. Maximum TP removal efficiencies were determined as 92.8, 90.8 and 86.2 for 1002, 1001.5 and 1001 input CP ratios at 0.375 AVF, respectively. Results showed that total phosphorus TP removal efficiency is determined by both influent CP ratio and AVF in AO process. Of these, the effect of AVF is more prominent. For efficient removal of phosphorus, AVF ratios of 0.25 to 0.375 should be employed.

 Bu çalışmada, bir kuramsal anaerobik-oksik AO prosesinde reaktörlerin hidrolik bekletme sürelerinin HRT fosfor giderimi üzerindeki etkilerinin bir aktif çamur modeli kullanılarak simülasyonuna ilişkin bir çalışmanın sonuçları sunulmuştur. Simülasyonlar, CP oranları sırasıyla 1001.0, 1001.5 ve 1002.0 değerlerine karşılık gelen düşük, orta ve güçlü giriş fosfor yüklerinde gerçekleştirilmiştir. Giriş fosfor yüklerinin her biri için 0.125 ile 0.625 arasında değişen anaerobik hacim fraksiyonlarında AHF denemeler yapılarak HRT değişimi için prosesin tepkisi incelenmiştir. Ayrıca, kimyasal oksijen ihtiyacı KOİ, toplam azot TN, toplam fosfor TP, ve askıda katı madde AKM için giderim verimleri de hesaplanmıştır. Çalışmada, 1001.0, 1001.5 ve 1002.0 giriş CP oranlarındaki en yüksek KOİ giderim verimleri 0.250 AHFde 91.8 1002.0 ve 1001.5 için ve 0.125 ile 0.250 AHFde 91.7 olarak belirlenmiştir. Tüm giriş fosfor yükleri için en yüksek TN giderim verimi 0.625 AHFde 56.3, en yüksek AKM giderim verimi ise 0.125 AHFde 93.3 olarak hesaplanmıştır. En yüksek TP giderim verimleri 1001.0, 1001.5 ve 1002.0 giriş CP oranları için sırasıyla 92.8, 90.8 ve 86.2 olarak, 0.375 AHFde gözlenmiştir. Sonuçlar, toplam fosfor TP giderim veriminin giriş CP oranı ve anaerobik hacim fraksiyonuna AHF bağlı olduğunu ortaya koymuştur. Bunlarda AHFnin etkisi daha baskındır. Etkin fosfor giderimi için AHFnin 0.250 ile 0.375 arasında tutulması uygun olacaktır.

Makale detayları

Model-Based investigation of the effects of reactors’ hydraulic retention times on phosphorus removal efficiency in an AO process

Yazarlar:

Sümeyye Yaşar | Neslihan Manav Demir | Selami Demir

Yayıncı:

Pamukkale University

Ana Başlıklar:

Çevre Mühendisliği (Diğer)

Dergi:

Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.29 Issue 6, pp.636-641

Belge Tipi:

Makale

Yayın Tarihi:

11/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001304202

pISSN:

2147-5881

Activated sludge model

AO process

Reactor volumes

Phosphorus removalAktif çamur modeli

AO prosesi

Reaktör hacimleri

Fosfor giderimi

Sayı

Makale detayları

Yazarlar: Sümeyye Yaşar | Neslihan Manav Demir | Selami Demir

Yayıncı: Pamukkale University

Ana Başlıklar: Çevre Mühendisliği (Diğer)

Dergi: Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.29 Issue 6, pp.636-641

Belge Tipi: Makale

Yayın Tarihi: 11/2023

Belge Dili: İngilizce

Document ID (Org No.): 2001304202

pISSN: 2147-5881

Sayı

Yazarlar:

Sümeyye Yaşar | Neslihan Manav Demir | Selami Demir

Yayıncı:

Pamukkale University

Ana Başlıklar:

Çevre Mühendisliği (Diğer)

Dergi:

Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi Vol.29 Issue 6, pp.636-641

Belge Tipi:

Makale

Yayın Tarihi:

11/2023

Belge Dili:

İngilizce

Document ID (Org No.):

2001304202

pISSN:

2147-5881