SUPPORT MATERIAL ALTERNATIVES FOR BIOLOGICAL FILTER REACTORS (BFRs)

Year 2002, Volume: 4 Issue: 3, 13 - 26, 01.09.2002

Deniz Dölgen M Necdet Alpaslan

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

References

• Dee A., James N., Jones I., Strickland J., Upton J., Cooper P. (1994): “Pre-or Post- Denitrification at Biological Filter Works? A Case Study”, Water Science and Technology, Vol. 29, No. 10-11, pp. 145-155.
• Dölgen D. (1998): “Treatment of Wastewater by 3F (Fluidised-Fixed and Filter) Reactor”, Doktora Tezi, Yön. Necdet Alpaslan, Dokuz Eylül Üniversitesi, Fen Bilimleri Enstitüsü, İzmir.
• Farrimond M., Upton J. (1993): “A Strategy to Meet the Nutrient (N and P) Standards of the Urban Wastewater Directive”, Water Science and Technology, Vol. 27, No. 5-6, pp. 297- 306.
• Fruhen M., Kühn W., Dohmann M. (1994): “Upgrading of a Wastewater Treatment Plant Utilizing Existing Trickling Filters and a New Filter Stage”, Water Science and Technology, Vol. 29, No. 12, pp. 59-67.
• Jepsen S.E., La Cour Jansen J. (1993): “Biological Filters for Post-Denitrification”, Water Science and Technology, Vol. 27, No. 5-6, pp. 369-379.
• Kraft A., Seyfried C.F. (1990): “Biologically Intensified Filtration (Dual-Media Dry Bed Filter) for Advanced Wastewater Treatment”, Water Science and Technology, Vol. 22, No. 1-2, pp. 317-328.
• Lazarova V., Manem J. (1994): “Advances in Biofilm Aerobic Reactors Ensuring Effective Biofilm Reactors”, Water Science and Technology, Vol. 29, No. 10-11, pp. 319-327.
• Meaney B.J., Strickland J.E.T. (1994): “Operating Experiences with Submerged Filters for Nitrification and Denitrification”, Water Science and Technology, Vol. 29, No. 10-11, pp. 119-125.
• Morper M.R. (1994): “Upgrading of Activated Sludge Systems for Nitrogen Removal by Application of The Linpor®-CN Process”, Water Science and Technology, Vol. 29, No. 12, pp. 167-176.
• O’Neill M.J., Horan N.J. (1993): “Design Criteria for Tertiary Nitrifying Biological Filters”, Chapter 2.2, Attached Growth Process for the Removal of Ammonia and Nitrogen, pp. 67- 72.
• Ouyang C.F., Liaw C.M. (1994): “The Optimum Medium of the Suspended Bio-Medium Aeration Contactor Process”, Water Science and Technology, Vol. 29, No. 10-11, pp. 183- 188.
• Pujol R., Hamon M., Kandel X., Lemmel H. (1994): “Biofilters: Flexible, Reliable Biological Reactors”, Water Science and Technology, Vol. 29, No. 10-11, pp. 33-38.
• Quaye B.A. (1987): “Predicting Optimum Backwash Rates and Expansion of Multi-media Filters”, Water Research, Vol. 21, No. 9, pp. 1077-1087.
• Rogalla F., Lomouche A., Specht W., Kleiber B. (1994): “High Rate Aerated Biofilters for Plant Upgrading”, Water Science and Technology, Vol. 29, No. 12, pp. 207-216.
• Sekoulov I., Oles J. (1993): “Multiple Use of Filter Units in Wastewater Treatment”, Proc. Europ. Wat. Filt. Congress, March, Ooestende, Belgium, pp. 2.109-2.119.
• Sekoulov I., Görg S. (1995): “Endüstriyel Atıksu Arıtımında Sabit Yataklı Sistemler”, Su Kirliliği ve Kontrolu Dergisi, Cilt 5, Sayı 2, s. 9-16.
• Türk Standartları (1978): “Agrega Karışımlarının Elek Analizi Deneyi İçin Metod”, TSE, Ankara.
• Türk Standartları (1980a): “Beton Agregalarında Özgül Ağırlık ve Su Emme Oranı Tayini”, TSE, Ankara.
• Türk Standartları (1980b): “Beton Agregalarının Birim Ağırlıklarının Tayini”, TSE, Ankara.
• Tsubone T., Osaki Y., Yoshi Y., Takahashi M. (1992): “Effect of Biomass Entrapment and Carrier Properties on the Performance of an Air-Fluidized-Bed Biofilm Reactor”, Water Environment Research, Vol. 64, No. 7, pp. 884-889.
• Van Der Hoek J.P., Jong R.C., Kappelhof J.W., Hıjnen W.A., Creusen A.J., Bekkers A.J., Feij L.A. (1993): “Nitrate Removal from Groundwater by Biological Filtration Using the Fixed Bed/Ethanol Process”, Proc. Europ. Wat. Filt. Congress, March, Ooestende, Belgium, pp. 2.55-2.