Influence of iron on nitrification in full-scale drinking water trickling filters

In the production of drinking water from groundwater, iron removal in filters may interfere with nitrification. Microbial nitrification might decline because of irreversible accumulation of iron deposits in pores and on filter material. This paper shows the successful application of two experimental...

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Bibliographic Details
Published in:Aqua (London) 2009-06, Vol.58 (4), p.247-256
Main Authors: de Vet, W. W. J. M., Rietveld, L. C., van Loosdrecht, M. C. M.
Format: Article
Language:English
Subjects:
Accumulation
Aeration
Ammonium
Ammonium compounds
Ammonium nitrogen
Backwash
Deposits
Drinking water
Filters
Groundwater
Iron
Microorganisms
Nitrification
Removal
Trickling filters
Water purification
Water treatment
Water treatment plants
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Summary:In the production of drinking water from groundwater, iron removal in filters may interfere with nitrification. Microbial nitrification might decline because of irreversible accumulation of iron deposits in pores and on filter material. This paper shows the successful application of two experimental techniques applied at a full-scale water treatment plant in the Netherlands to maintain sustainable nitrification. Filter performances were evaluated by measurements of ammonium in the filter effluent, accumulation of deposits and their removal during backwash, development of the mainly inorganic filter coating and media expansion curves. The application of dual-media drinking water trickling filters, in combination with filter backwash with media expansion, minimizes the irreversible accumulation of iron deposits in the filter. Subsurface aeration results in a lower iron content of the filter coating.
ISSN:0003-7214
1606-9935
1605-3974
1365-2087
DOI:10.2166/aqua.2009.115