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Influence of microbial interactions and EPS/polysaccharide composition on nutrient removal activity in biofilms formed by strains found in wastewater treatment systems
KTH, Skolan för bioteknologi (BIO), Miljömikrobiologi.
KTH, Skolan för bioteknologi (BIO), Miljömikrobiologi.
KTH, Skolan för bioteknologi (BIO), Miljömikrobiologi.
2011 (Engelska)Ingår i: Microbiology Research, ISSN 0944-5013, E-ISSN 1618-0623, Vol. 166, nr 6, s. 449-457Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The study of biofilm function, structure and microbial interactions might help to improve our understanding of biofilm wastewater treatment processes. However, few reports specifically address the influence of interactions within multispecies biofilms on microbial activity and biofilm composition. Thus, the relationship between biofilm formation, denitrification activity, phosphorus removal and the composition of extracellular polymeric substances (EPS), exopolysaccharides and the bacterial community was investigated using biofilms of denitrifying and phosphorus removing strains Comamonas denitrificans 110, Brachymonas denitrificans B79, Aeromonas hydrophila L6 and Acinetobacter calcoaceticus ATCC23055. Denitrification activity within the biofilms generally increased with the amount of biofilm while phosphorus removal depended on bacterial growth rate. Synergistic effects of co-growth on denitrification (B. denitrificans B79 and A. hydrophila L6) and phosphorus removal (C. denitrificans 110 with either A. calcoaceticus or A. hydrophila L6) were observed. B. denitrificans B79 was highly affected by interspecies interactions with respect to biofilm formation, denitrification activity and EPS composition, while C. denitrificans 110 remained largely unaffected. In some of the dual and quadruple strain biofilms new exopolysaccharide monomers were detected which were not present in the pure strain samples.

Ort, förlag, år, upplaga, sidor
2011. Vol. 166, nr 6, s. 449-457
Nyckelord [en]
Biofilm, Denitrification, EPS, Phosphorus removal, Polysaccharide
Nationell ämneskategori
Mikrobiologi
Identifikatorer
URN: urn:nbn:se:kth:diva-45606DOI: 10.1016/j.micres.2010.08.005ISI: 000295811900002Scopus ID: 2-s2.0-80052083241OAI: oai:DiVA.org:kth-45606DiVA, id: diva2:452563
Anmärkning
QC 20111031Tillgänglig från: 2011-10-31 Skapad: 2011-10-31 Senast uppdaterad: 2017-12-08Bibliografiskt granskad

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Andersson, SofiaDalhammar, GunnelKuttuva Rajarao, Gunaratna
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Miljömikrobiologi
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Microbiology Research
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