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SON ÇÖKELTME HAVUZLARINDA SU MERCİMEĞİNİN (LEMNA MINOR L.) ROLÜ

THE ROLE OF DUCKWEED (LEMNA MINOR L.) IN SECONDARY CLARIFIER TANKS

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Abstract (2. Language): 
In this study, the effects of duckweed (Lemna minor L.) presence on the effluent water quality and settling characteristics in the secondary clarifier tank of a conventional biological treatment plant were investigated. For this purpose, the performances of the secondary clarifier with and without duckweed were compared. In the secondary clarifier tank with duckweed, COD, BOD5, ammonium and phosphate removal efficiencies were higher by 15, 25, 35 and 45%, respectively. SS concentration of effluent and values of sludge volume index (SVI) were the same. The results showed that duckweed contributes to treatment efficiency of conventional biological treatment plant, which reduces the need of tertiary nutrients removal.
Abstract (Original Language): 
Bu çalışmada, bir klasik biyolojik atıksu arıtma tesisinin son çökeltme havuzunda oluşan su mercimeğinin çıkış suyu kalitesine ve çökelme karakteristiğine olan etkisi araştırılmıştır. Bu amaçla, su mercimeği bulunan son çökeltme havuzuyla su mercimeği bulunmayan son çökeltme havuzu karşılaştırılmıştır. Su mercimeği bulunan son çökeltme havuzunda; KOİ giderme verimi % 15, BOİ5 giderme verimi % 25, amonyum giderme verimi % 35 ve fosfat giderme verimi % 45 daha yüksek bulunmuştur. Çıkış suyunun askıda katı maddesi ve çamur hacim indeksi (SVI) değerleri bakımından bir farklılık gözlenmemiştir. Bu sonuçlar, son çökeltme havuzunda oluşan su mercimeğinin arıtma verimini artıracağını ve üçüncül nutrient giderimi ihtiyacını azaltacağını göstermektedir.

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