Removal of Suspended Particles from Wastewater by Conventional Flotation and Floc-flotation

Abstract

Bu çalışmada, askıda tane içeren atıksuya klasik flotasyon ve flok-flotasyonu yöntemlerinin uygulanması araştırılmıştır. Deneyler, Jameson flotasyon hücresinde iki aşamada yürütülmüştür. İki yöntemden elde edilen sonuçlar karşılaştırılmıştır. Aynı zamanda, ince tane uzaklaştırma etkinliği ve kalan bulanıklık üzerine flotasyon süresi ve polimer tipinin etkisi belirlenmiştir. Deneysel çalışmalar sonucunda, klasik flotasyona kıyasla flok-flotasyonu ile daha yüksek tane uzaklaştırma verimi ve daha düşük kalan bulanıklık değerlerinin elde edildiği bulunmuştur. Flotasyon süresini arttırmak, ince tanelerin yüzebilirliğini arttırmış ve bulanıklığı azaltmıştır. 1. aşama deneylerinde, 10 dak.flotasyon süresi sonunda anyonik polimer (SPP 508) ve anyonik toplayıcının (Aero 845) birlikte kullanılması ile %96.6 flotasyon verimi ve 304 NTU bulanıklık değeri elde edilmiştir. 2. Aşama deneylerinde flok-flotasyonu ile 10 dak. sonunda %98’in üzerinde yüzdürme verimleri elde edilmiştir. Atıksuyun kalan bulanıklık değeri, başlangıç bulanıklık değeri olan 12000 NTU’dan 78 NTU’ya anyonik polimer ile, 39 NTU’ya katyonik polimer ile ve 27 NTU’ya iyonlaşmayan polimer ile düşürülmüştür.

Keywords

• Atıksu Arıtımı
• Flokülasyon
• Flotasyon
• Floc-flotasyonu

Removal of Suspended Particles from Wastewater by Conventional Flotation and Floc-flotation

Abstract

In this study, the application of conventional flotation and floc-flotation methods to the wastewater containing suspended particles have been investigated. The experiments were carried out in two stages in the Jameson flotation Cell. The results obtained from the two methods were compared. The effect of flotation time and polymer type on the fine particle removal efficiency and residual turbidity was also determined. As a result of experimental studies, it was found that higher particle removal recovery and lower residual turbidity were obtained by floc-flotation compared to conventional flotation. Increasing flotation time increased fine particle floatability and decreased residual turbidity. In 1st stage of the experiments, 96.6% of the floatability recoveries and 304 NTU residual turbidity value was obtained with the combination of anionic polymer (SPP 508) and anionic surfactant (Aero 845) at the end of the 10 minutes flotation time. After 10 minutes of 2nd stage experiments, over 98% of floatability recoveries were obtained by floc flotation. The residual turbidity value of wastewater was decreased from the initial turbidity value of 12000 NTU to 78 NTU by anionic polymer, to 39 NTU by cationic polymer, and 27 NTU by a nonionic polymer.

Keywords

• Wastewater treatment
• Flocculation
• Flotation
• Floc flotation

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