Optimization of Nitrification Process by a Bacterial Consortium in the Submerged Biofiltration System with Ceramic Bead Carrier

Olga Muter, Alina Mihailova, Andrejs Berzins, Karlis Shvirksts, Aloizijs Patmalnieks, Silvija Strikauska, Mara Grube

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Abstract

Laboratory-scale solid phase submerged system was developed to study the process of ammoniumbiodegradation. Ceramic beads were found to be an appropriate carrier material for the attachment of thePNNbacterial consortium (Pseudomonas sp., Nitrosomonas sp., Nitrobacter sp.) exhibiting nitrification/denitrificationactivity. This consortium was previously isolated from a biological activated sludge process at a fish factorywastewater treatment plant. Three organic amendments - molasses, humic acid extract, and malt extract - were usedfor the ceramic bead pretreatment. Molasses significantly enhanced (p<0.05) the process of bacteria attachmentonto the ceramic carrier and further ammonium removal from the bulk liquid media. The addition of 0.45% fructoseto the column notably enhanced ammonium oxidation, as demonstrated by more rapid formation of nitrites in themedium when compared to the sets without sugars. The results of this study could be incorporated in a larger-scaletest of a biofiltration column using wastewater from a fish processing factory
Original languageEnglish
Pages (from-to)148-153
Number of pages6
JournalJournal of Microbial and Biochemical Technology
Volume6
Issue number3
DOIs
Publication statusPublished - Jan 2014

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