SUCCESSFUL FULL-SCALE IMPLEMENTATION OF A BIOLOGICAL AERATED FILTER FOR SECOND STAGE NITRIFICATION

2004 ◽  
Vol 2004 (10) ◽  
pp. 458-472
Author(s):  
Kim Rees ◽  
Alice Ohrtmann ◽  
George Sprouse
Keyword(s):  
Full Scale ◽  
Biological Aerated Filter ◽  
Second Stage ◽  
Aerated Filter

Influence of organic and ammonia loading on nitrifier activity and nitrification performance for a two-stage biological aerated filter system

1999 ◽  
Vol 39 (7) ◽  
pp. 227-234 ◽  
Author(s):  
K. R. Gilmore ◽  
K. J. Husovitz ◽  
T. Holst ◽  
N. G. Love
Keyword(s):  
Water Quality ◽  
Ammonia Oxidation ◽  
Oligonucleotide Probe ◽  
Treatment Plant ◽  
Ammonia Oxidizing Bacteria ◽  
Biological Aerated Filter ◽  
Two Stage ◽  
Second Stage ◽  
Oxidation Stage ◽  
Aerated Filter

A pilot-scale, two-stage (carbon oxidation stage one, ammonia oxidation stage two) fixed film biological aerated filter (BAF) process was operated during the wintertime on-site at a domestic wastewater treatment plant. Over the study period, hydraulic loadings to the system were varied and generated a range of organic and ammonia loading conditions. Nitrification performance was monitored based on water quality along the length of the filters, effluent water quality, and activity levels of ammonia-oxidizing bacteria within the biofilm using an oligonucleotide probe. Overall nitrification efficiency for wintertime conditions (average temperature 12.4 ± 0.1°C) was greater than 90 percent when ammonia-N loadings to the second stage were 0.6 kg/m3-day or less. Nitrification efficiency started to deteriorate at loadings beyond this point. Biofilm and liquid samples were collected along the distance of the two columns at high and low ammonia loadings. The degree of activity observed by ammonia oxidizing bacteria in the biofilm corresponded with the disappearance of ammonia and the generation of nitrate as water passed through the columns. The zones of ammonia oxidizing activity progressed along the length of the columns as organic and ammonia loadings to the system increased. The oligonucleotide probe data suggest that this shift in the location of the nitrifier population is due to higher BOD loads to the second stage, which supported higher levels of heterotrophic growth in the column.

Nitrous oxide emissions from a full-scale biological aerated filter (BAF) subject to seawater infiltration

2019 ◽  
Vol 26 (20) ◽  
pp. 20939-20948 ◽  
Author(s):  
Anabela Vieira ◽  
Ricardo Marques ◽  
Claudia Galinha ◽  
Pedro Povoa ◽  
Gilda Carvalho ◽  
...  
Keyword(s):  
Nitrous Oxide ◽  
Full Scale ◽  
Nitrous Oxide Emissions ◽  
Biological Aerated Filter ◽  
Aerated Filter

Modelling the nitrification in a full-scale tertiary biological aerated filter unit

2013 ◽  
Vol 37 (2) ◽  
pp. 289-300 ◽  
Author(s):  
Jean Bernier ◽  
Vincent Rocher ◽  
Sabrina Guerin ◽  
Paul Lessard
Keyword(s):  
Full Scale ◽  
Biological Aerated Filter ◽  
Filter Unit ◽  
Aerated Filter

A Study of Fibre Media Submerged Biological Aerated Filter-Activated Sludge Process (FM-AS) for Sewage Treatment

1993 ◽  
Vol 27 (5-6) ◽  
pp. 413-423 ◽  
Author(s):  
Shi. Han-Chang ◽  
V. K. Thomas
Keyword(s):  
Activated Sludge ◽  
Sewage Treatment ◽  
Cost Effective ◽  
Activated Sludge Process ◽  
Biological Aerated Filter ◽  
Dissolved Air Flotation ◽  
Separation Unit ◽  
Second Stage ◽  
Aerated Filter ◽  
Two Stages

The FM-AS process is a two-stage aerobic process consisting of a submerged biological aerated filter packed with fibre media as the first stage and activated sludge as the second stage. A separation unit working on the principle of dissolved-air flotation is needed between the two stages to remove the solids and thereby maintain a suitable sludge age for nitrification in the second stage. The FM-AS process produces effluents with good qualities. The highest removal efficiencies, obtained with a hydraulic retention time of 4.6 hrs. and an operating temperature of 16°C, for BOD5. NH3-N and SS were 95%, 95% and 90% respectively. The economic evaluation suggests that the FM-AS process can be more cost effective than the traditional activated sludge process, particularly when used for upgrading.

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