Hareketli yatak biyofilm reaktörde(hybr) çeşitli organik ve hidrolik yüklerin atıksu arıtma verimine etkisi
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Dosyalar
Tarih
2006
Yazarlar
Dergi Başlığı
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Cilt Başlığı
Yayıncı
Selçuk Üniversitesi Fen Bilimleri Enstitüsü
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Hareketli yatak biofilm reaktör (HYBR ) biofilm büyümesini desteklemek için havalandırılmış veya havalandırılmamış tankta küçük silindirik şekilli polyethylene taşıyıcı elementler kullanıldığı aerobik bir biyolojik arıtma metodudur. Bu proseste bağlı büyüme ve askıda büyüme proseslerinin avantajları bir araya getirilirken dezavantajları minimize edilir. Bu çalışmada, laboratuar ölçekli 2 L'lik HYBR reaktörü kullanılmış ve hacminin % 50'si sentetik taşıyıcı malzeme ile doldurulmuştur. Farklı işletme koşullarında sistem performansının değişimini daha iyi ifade etmek, atıksu kompozisyonun değişiminden kaynaklanacak problemleri önlemek amacıyla HYBR reaktörü KO / NH4-N / PO4-P oranı 100:5:1 olan sentetik atıksu ile beslenmiştir. Bu çalışma iki bölümden oluşmuştur. Birinci bölümde hidrolik yüklemelerin, ikinci bölümde ise organik yüklemelerin sistem performansı üzerine etkisi araştırılmıştır. Birinci bölümde HYBR prosesi 500 mg/L KO içeren sentetik atıksu ile beslenmiş; 4 , 8 ve 12 saat hidrolik alıkonma sürelerinde çalıştırılmıştır. 4 , 8 ve 12 saat hidrolik alıkonma süreleri için çökeltme havuzu çıkışı ortalama filtrelenmemiş KO değerleri sırasıyla 26,9, 24,5 ve 23,3 mg/L olarak hesaplanırken, çökeltme havuzu çıkışı ortalama filtrelenmiş KO değerleri sırasıyla 17,7 mg/L, 16,1 mg/L ve 15,8 mg/L olarak hesaplanmıştır. Artan hidrolik alıkonma sürelerinde sırasıyla ortalama filtrelenmemiş KO giderim verimleri % 94,6, % 95,1 , % 95,4 iken ortalama filtrelenmiş KO verimleri sırasıyla % 96,5, % 96,8, % 96,9'dur. Artan hidrolik yüklemeler nitrifikasyonu da arttırmıştır. Sırasıyla çıkış NO3-N değerleri 6,12 mg/L, 10,99 mg/L ve 16,6 mg/L iken çökeltme havuzu çıkış NH4-N değerleri nitrifikasyona bağlı olarak azalmış ve sırasıyla 4,11 mg/L, 2,47 mg/L ve 0,8 mg/L olarak ölçülmüştür. kinci bölümde ise HYBR prosesi 8 saat hidrolik alıkonma süresinde artan organik yüklemelerde çalıştırılmıştır. 500, 1000, 2000, 4000 ve 8000 mg/L KO içeren sentetik atıksu ile beslenen HYBR prosesinde artan organik yüklemeler ile KO giderim veriminde azalmalar tespit edilmiştir. Ortalama filtrelenmiş KO giderim verimleri sırasıyla % 96,8 , % 96,2 , % 92,4 , % 73,2 ve % 52,7 olarak hesaplanırken ortalama filtrelenmemiş KO giderim verimleri sırasıyla % 95,1 , % 95 , % 89,3 , % 68,7 ve % 45,2 olarak hesaplanmıştır. Bununla birlikte artan organik yükleme ile nitrifikasyonun azaldığı tespit edilmiştir. Sırasıyla çıkış NO3-N değerleri 10,99 mg/L, 1,85 mg/L ve 0,85 mg/L olarak ölçülmüştür. Artan amonyak yüklemesine karşın çıkış NO3-N değeri sürekli olarak azalmıştır. 4000 ve 8000 mg/L KO içeren sentetik atıksu ile yapılan organik yüklemede nitrifikasyona rastlanmamıştır. Deneysel çalışma boyunca organik yükleme ile sentetik taşıyıcı malzeme üzerindeki biyokütle arasında yakın ilişki olduğu tespit edilmiştir.
Moving Bed Biofilm Reactor (MBBR) is a biological treatment method in which little cylindrical shaped polyethylene carrier elements are used in aereted or unaereted tanks to support the growth of biofilm. In this process, the advantages of suspended and attached growth processes are collected whereas the disadvantages of them are minimized. Lab-scale MBBR having a 2 L volume was used and 50 % of this volume was filled with kaldnes K1 synthetic carrier element. This reactor was fed with a synthetic wastewater, the COD/NH4-N/PO4-P ratio of which was 100:5:1, respectively, in order to explain the change in system performance under different conditions and to prevent the problems raising from the change in wastewater composition. This study includes two parts: in the first part, the effect of hydraulic load and in the second part the effect of organic load on the system performance were investigated. In the first part, MBBR was fed with a synthetic wastewater including 500 mg/L COD and 4,8 and 12 hours hydraulic retention times were studied. The mean final settler outlet unfiltered COD values of 4 hours, 8 hours and 12 hours hydraulic retention times were calculated as 26.9 mg/L, 24.5 mg/L and 23.3 mg/L, respectively, while those of filtered COD vales were calculated as 17.7 mg/L, 16.1 mg/L and 15.8 mg/L, respectively. The mean unfiltered COD removal efficiencies of increasing hydraulic retention times were 94.6 %, 95.1 % and 95.4 % respectively, while those of filtered ones were 96.5 %, 96.8 % and 96.9 % respectively. Increasing the hydraulic load also increased the nitrification. The outlet values of NO3-N were 6.12 mg/L, 10.99 mg/L and 16.6 mg/L, respectively while the values of NH4-N decreased depending on the nitrification and were measured as 4.11 mg/L, 2.47 mg/L and 0.8 mg/L, respectively. In the second part, MBBR was operated with increasing organic load in 8-hour hydraulic retention time. In the process of MBBR fed with synthetic wastewater including 500, 1000, 2000, 4000 and 8000 mg/L COD, decreases in the COD removal efficiency were observed with increases in organic load. The mean final settler outlet filtered COD removal efficiencies were calculated as 96.8%, 96.2% , 92.4%, 73.2% and 52.7%, respectively, while those of unfiltered ones were calculated as 95.1 %, 95%, 89.3%, 68.7% and 45.2%, respectively. In addition to this, nitrification decreased with increasing organic load. The outlet NO3-N values were measured as 10.99 mg/L, 1.85 mg/L and 0.85 mg/L, respectively. The outlet NO3-N values decreased despite the increases in amonium load. In the organic load made with a synthetic wastewater including 4000 and 8000 mg/L COD, there was no nitrification observed. Throughout the whole experiments, a close relationship between organic load and biomass on the synthetic carrier element was observed.
Moving Bed Biofilm Reactor (MBBR) is a biological treatment method in which little cylindrical shaped polyethylene carrier elements are used in aereted or unaereted tanks to support the growth of biofilm. In this process, the advantages of suspended and attached growth processes are collected whereas the disadvantages of them are minimized. Lab-scale MBBR having a 2 L volume was used and 50 % of this volume was filled with kaldnes K1 synthetic carrier element. This reactor was fed with a synthetic wastewater, the COD/NH4-N/PO4-P ratio of which was 100:5:1, respectively, in order to explain the change in system performance under different conditions and to prevent the problems raising from the change in wastewater composition. This study includes two parts: in the first part, the effect of hydraulic load and in the second part the effect of organic load on the system performance were investigated. In the first part, MBBR was fed with a synthetic wastewater including 500 mg/L COD and 4,8 and 12 hours hydraulic retention times were studied. The mean final settler outlet unfiltered COD values of 4 hours, 8 hours and 12 hours hydraulic retention times were calculated as 26.9 mg/L, 24.5 mg/L and 23.3 mg/L, respectively, while those of filtered COD vales were calculated as 17.7 mg/L, 16.1 mg/L and 15.8 mg/L, respectively. The mean unfiltered COD removal efficiencies of increasing hydraulic retention times were 94.6 %, 95.1 % and 95.4 % respectively, while those of filtered ones were 96.5 %, 96.8 % and 96.9 % respectively. Increasing the hydraulic load also increased the nitrification. The outlet values of NO3-N were 6.12 mg/L, 10.99 mg/L and 16.6 mg/L, respectively while the values of NH4-N decreased depending on the nitrification and were measured as 4.11 mg/L, 2.47 mg/L and 0.8 mg/L, respectively. In the second part, MBBR was operated with increasing organic load in 8-hour hydraulic retention time. In the process of MBBR fed with synthetic wastewater including 500, 1000, 2000, 4000 and 8000 mg/L COD, decreases in the COD removal efficiency were observed with increases in organic load. The mean final settler outlet filtered COD removal efficiencies were calculated as 96.8%, 96.2% , 92.4%, 73.2% and 52.7%, respectively, while those of unfiltered ones were calculated as 95.1 %, 95%, 89.3%, 68.7% and 45.2%, respectively. In addition to this, nitrification decreased with increasing organic load. The outlet NO3-N values were measured as 10.99 mg/L, 1.85 mg/L and 0.85 mg/L, respectively. The outlet NO3-N values decreased despite the increases in amonium load. In the organic load made with a synthetic wastewater including 4000 and 8000 mg/L COD, there was no nitrification observed. Throughout the whole experiments, a close relationship between organic load and biomass on the synthetic carrier element was observed.
Açıklama
Anahtar Kelimeler
Biofilm, Hareketli yatak biyofilm reaktörler, Organik madde giderimi, Nitrifikasyon, Hidrolik yükleme, Organik yükleme, Moving bed biofilm reactor, Organic carbon removal, Nitrification, Hydruclic load, Organic load
Kaynak
WoS Q Değeri
Scopus Q Değeri
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Künye
Aygün, A. (2006). Hareketli yatak biyofilm reaktörde(hybr) çeşitli organik ve hidrolik yüklerin atıksu arıtma verimine etkisi. Selçuk Üniversitesi, Yayımlanmış yüksek lisans tezi, Konya.
