A Review of Biological Aerated Filters (BAFs) for Wastewater Treatment

ABSTRACT Biological aerated filters (BAFs) can combine ammonia, carbonaceous matter, and solids removal in a single-unit process. Biological nutrient removal (N and P) can also be accomplished. Removal rates based on reactor volume for carbonaceous BOD, ammonia, and nitrates of up to 4.1 kg BOD m−3 day−1, 1.27 kg NH3-N m−3 day−1 and 5 kg NO3-N m−3 day−1, respectively, are normally reported. The small footprint and adaptability of BAFs allows them to be used in upgrading established works, especially those in built up areas where space is at a premium. Although many configurations are available, including upflow and downflow, sunken, and floating media, the process still requires some optimization, especially with regard to media type, backwashing rates, and aeration control to decrease power consumption. Key words: biological aerated filter; wastewater treatment; submerged media bioreactor; carbonaceous matter removal; nitrification

[1]  John Williams,et al.  Effects of Plastic Support Media on the Diffusion of Air in a Submerged Aerated Filter , 1998 .

[2]  M. Hamoda.  Kinetic analysis of aerated submerged fixed-film (ASFF) bioreactors , 1989 .

[3]  K. Sørensen,et al.  Biofilm reactors configuration for advanced nutrient removal , 1994 .

[4]  Oxygen flux limitation in aerobic fixed-film biotreatment of a hazardous landfill leachate , 1995 .

[5]  R. Pujol,et al.  Biological Aerated Filters: An Attractive and Alternative Biological Process , 1992 .

[6]  H. D. Stensel,et al.  Biological Aerated Filter Evaluation , 1988 .

[7]  S. A. Beg,et al.  Effects of inhibitors on nitrification in a packed-bed biological flow reactor , 1987 .

[8]  Hervé Pingaud,et al.  A generalized approach for dynamic modelling and simulation of biofilters: Application to waste-water denitrification , 1997 .

[9]  T. Stephenson,et al.  Phosphorus removal by chemical precipitation in a biological aerated filter , 1997 .

[10]  J. Jansen,et al.  Biological Filters for Post-Denitrification , 1993 .

[11]  Kenneth J. Williamson,et al.  Packed Bed Biofilm Reactors: Simplified Model , 1981 .

[12]  F. Rogalla,et al.  Nitrification and phosphorus precipitation with biological aerated filters. , 1990 .

[13]  F. Rogalla,et al.  High rate aerated biofilters for plant upgrading , 1994 .

[14]  V. Thomas,et al.  A Pilot-Scale Evaluation of the ‘Biocarbone Process’ for the Treatment of Settled Sewage and for Tertiary Nitrification of Secondary Effluent , 1990 .

[15]  O. Hao,et al.  FACTORS AFFECTING NITRITE BUILDUP IN SUBMERGED FILTER SYSTEM , 1994 .

[16]  F. Rogalla,et al.  Biofilm start‐up and control in aerated biofilter , 1991 .

[17]  F. Rogalla,et al.  New Developments in Complete Nitrogen Removal with Biological Aerated Filters , 1990 .

[18]  M. Hamoda,et al.  Nitrification in the aerated submerged fixed-film (ASFF) bioreactor , 1991 .

[19]  C. Visvanathan,et al.  Study on Aerated Biofilter Process under High Temperature Conditions , 1995 .

[20]  F. Rogalla,et al.  Biocarbone Aerated Filters - Ten Years After: Past, Present, and Plenty of Potential , 1992 .

[21]  Tom Stephenson,et al.  Modelling biological aerated filters for wastewater treatment , 1997 .

[22]  A. J. Smith,et al.  Construction and Operation of a Submerged Aerated Filter Sewage‐Treatment Works , 1994 .

[23]  W. Gujer,et al.  Activated sludge model No. 3 , 1995 .

[24]  F. Çeçen,et al.  Criteria for nitrification and denitrification of high-strength wastes in two upflow submerged filters , 1995 .

[25]  David K. Stevens,et al.  A pioneer project of wastewater reuse in China , 1995 .

[26]  J. K. Park,et al.  Performance comparison between activated sludge and fixed film processes for priority pollutant removals , 1994 .

[27]  Z. Lewandowski,et al.  Inhibition of nitrification in the packed bed reactors by selected organic compounds , 1985 .

[28]  N. Bernet,et al.  Combined organic carbon and complete nitrogen removal using anaerobic and aerobic upflow filters , 1994 .

[29]  P. García-Encina,et al.  Influence of pH over nitrifying biofilm activity in submerged biofilters , 1997 .

[30]  G. Bourn,et al.  The Production of High‐Quality Effluents in Sewage Treatment Using the Biocarbone Process , 1991 .

[31]  L. G Costa Reis,et al.  Aerobic treatment of concentrated wastewater in a submerged bed reactor , 1985 .

[32]  Carlos Augusto de Lemos Chernicharo,et al.  Association of a UASB reactor and a submerged aerated biofilter for domestic sewage treatment , 1998 .

[33]  P. Gilles,et al.  Industrial-Scale Applications of Fixed Biomass on the Mediterranean Seaboard. Design, Operating Results , 1990 .

[34]  F. Fdz-Polanco,et al.  Influence of Substrate Concentration on the Growth and Activity of a Nitrifying Biofilm in a Submerged Biofilter , 1997 .

[35]  J. Ganczarczyk,et al.  Gravity separation of biomass washed‐out from an aerated submerged filter , 1994 .

[36]  Peter A. Wilderer,et al.  Phosphate Removal in a Biofilm Reactor , 1991 .

[37]  J. Young,et al.  Packed-bed reactors for secondary effluent BOD and ammonia removal. , 1975, Journal - Water Pollution Control Federation.

[38]  B. Rusten.  Wastewater treatment with aerated submerged biological filters , 1984 .

[39]  H. Sampa,et al.  Pilot-Plant Study of a New Wastewater Treatment System , 1995 .

[40]  Toshihiro Tanaka,et al.  Denitrification with isopropanol as a carbon source in a biofilm system , 1994 .

[41]  J. Upton,et al.  Pre- or post-denitrification at biological filter works? A case study , 1994 .

[42]  William C. Boyle,et al.  Oxygen transfer efficiency measurements in mixed liquor using off-gas techniques , 1983 .

[43]  W. Gujer,et al.  Tertiary nitrification in aerated pilot biofilters , 1994 .

[44]  R. Pujol,et al.  Biofilters: flexible, reliable biological reactors , 1994 .

[45]  S. A. Beg,et al.  Multi-substrate analysis of carbon oxidation and nitrification in an upflow packed-bed biofilm reactor , 1995 .

[46]  W. Gujer,et al.  Parameters affecting nitrifying biofilm reactors , 1994 .

[47]  F. Rogalla,et al.  The Treatment Trilogy of Floating Filters: From Pilot to Prototype to Plant , 1994 .

[48]  H. Ødegaard,et al.  Denitrification in a packed bed biofilm reactor (BIOFOR) — Experiments with different carbon sources , 1998, Water Research.

[49]  W Gujer,et al.  A multispecies biofilm model , 1986, Biotechnology and bioengineering.

[50]  S. A. Beg,et al.  Effect of fasting condition on multi‐substrate carbon oxidation and nitrification system in an upflow packed‐bed biofilm reactor , 1997 .

[51]  Clifford W. Randall,et al.  Biological process design for wastewater treatment , 1980 .

[52]  J. P. Canler,et al.  Biological aerated filters: assessment of the process based on 12 sewage treatment plants , 1994 .

[53]  F. Rogalla,et al.  Aerated biofilters for nitrification and effluent polishing. , 1990 .

[54]  T. Stephenson,et al.  A comparison of floating and sunken media biological aerated filters using tracer study techniques , 1995 .

[55]  M. Roš,et al.  Treatment of Wastewater in an Upflow Packed-Bed Reactor , 1991 .

[56]  R. Brenner,et al.  Elimination of Carbonaceous and Nitrogenous Pollutants by a Twin-Stage Fixed Growth Process , 1990 .

[57]  F. Fdz-Polanco,et al.  Temperature effect on nitrifying bacteria activity in biofilters: activation and free ammonia inhibition , 1994 .

[58]  Thomas Welander,et al.  Influence of Predators on Nitrification in Aerobic Biofilm Processes , 1994 .

[59]  A. Smith,et al.  High-rate sewage treatment using biological aerated filters , 1992 .

[60]  Denny S. Parker,et al.  Making a trickling filter/solids contact process work for cold weather nitrification and phosphorus removal , 1998 .

[61]  G. Wheale,et al.  Operational Experience with Biological Aerated Filters1 , 1995 .

[62]  J. Joret,et al.  Identification and characterization of bacterial activities involved in wastewater treatment by aerobic fixed-bed reactor , 1994 .

[63]  T. Watanabe,et al.  Anaerobic and Aerobic Submerged Bio-Filter System for Small Scale On-Site Domestic Sewage Treatment , 1993 .

[64]  J. Audic,et al.  The use of an upflow fixed bed reactor for treatment of a primary settled domestic sewage , 1986 .