SUPPORT MATERIAL ALTERNATIVES FOR BIOLOGICAL FILTER REACTORS (BFRs)

Abstract

Biological Filter Reactors (BFRs) are modified conventional filter systems which were used for wastewater treatment in recent years. One of the most substantial differences among the BFRs, which are currently developed with various trade names, is the nature of support material. In this study, a new support material called as “pellet” which is the waste material of water softening process was investigated as filter media in the BFRs. The major physical characteristics of pellet such as particle size distribution, specific weight, porosity, specific surface area were determined by using standard test methods set by Turkish Institute of Standards (TSE). Fluidisation characteristics such as minimum fluidisation velocity of pellets were also studied in a deep bed filter column. In addition pellet material was used in an up-flow fluidised bed filter reactor and the performance of the reactor in terms of COD removal was evaluated

Keywords

• Support material, Filter material, Carrier material, Biological filter, Fluidised bed reactors, Filter

BİYOLOJİK FİLTRE REAKTÖRLER (BFR) İÇİN DOLGU MALZEMESİ ALTERNATİFLERİ

Abstract

Biyolojik Filtre Reaktörler (BFR) klasik filtre sistemlerinin modifiye edilerek atıksu arıtımı amacıyla kullanıldığı yeni teknolojilerdir. Günümüzde farklı isimler altında geliştirilen biyolojik filtreleri birbirinden ayıran özelliklerin başında filtrelerde kullanılan dolgu malzemeleri gelmektedir. Sunulan makalede “pellet” olarak isimlendirilen, su yumuşatma sistemlerinden atık olarak çıkan bir malzemenin BFR’de dolgu malzemesi olarak kullanılabilirliği incelenmiştir. Bu kapsamda, Türk Standartları Enstitüsü’nün (TSE) ilgili şartnamelerinde açıklanan analiz yöntemleri kullanılarak malzemenin tane boyutu dağılımı, özgül ağırlık, birim hacim ağırlık, porozite, özgül yüzey alanı gibi fiziksel özellikleri belirlenmiştir. Laboratuvarda kurulu bir filtre kolonundan yararlanılarak malzemenin akışkanlaşma özellikleri (minimum akışkanlaşma hızı) araştırılmıştır. Ayrıca, yukarı akışlı akışkan yatak olarak işletilen bir reaktöre “pellet” doldurularak malzemenin atıksu arıtımı amacıyla kullanılabilirliği incelenmiş; organik madde giderimi esas alınarak arıtma verimi değerlendirilmiştir.

Keywords

• Dolgu malzemesi, Filtre malzemesi, Taşıyıcı malzeme, Biyolojik filtre, Akışkan yatak reaktörler, Filtre

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