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Immobilization of nitrifying bacteria on composite based on polymers and eggshells for nitrate production.
- Source :
-
Journal of bioscience and bioengineering [J Biosci Bioeng] 2021 Jun; Vol. 131 (6), pp. 663-670. Date of Electronic Publication: 2021 Mar 20. - Publication Year :
- 2021
-
Abstract
- Nitrification is a key step in biological nitrogen transformation which depends on the performance of specialized microorganisms. Generally, nitrifying bacteria present a low growth rate and performance which can be improved when immobilized as a biofilm. The development of new materials suitable for the immobilization of nitrifying microorganisms is very important in nitrification and wastewater treatment. In this study, the effect of eggshell powder on biofilm formation by Nitrosomonas europaea an ammonium-oxidizing bacteria and Nitrobacter vulgaris a nitrite-oxidizing bacteria, on new polymeric supports were analyzed. Polylactic acid, polyvinyl chloride and polystyrene were tested to produce polymer-eggshells powder composites and used as biofilm supports for nitrifying bacteria. The support material was characterized to identify the most suitable polymer-eggshells powder combination for the cell adhesion and biofilm formation. The nitrification results showed a highest nitrate production of 42 mg NO <subscript>3</subscript> <superscript>-</superscript> -N/L with polylactic acid-eggshell composite, with the best surface properties for cellular adhesion. Finally, scanning electron microscopy micrographs confirmed the best biofilm formed on polylactic acid-eggshell.<br /> (Copyright © 2021 The Society for Biotechnology, Japan. Published by Elsevier B.V. All rights reserved.)
- Subjects :
- Ammonia metabolism
Ammonium Compounds metabolism
Animals
Bacteria metabolism
Biofilms
Bioreactors microbiology
Enzymes, Immobilized chemistry
Nitrites metabolism
Nitrobacter metabolism
Nitrogen metabolism
Nitrosomonas metabolism
Oxidation-Reduction
Water Purification instrumentation
Water Purification methods
Egg Shell chemistry
Enzymes, Immobilized metabolism
Nitrates metabolism
Nitrification physiology
Polymers chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1347-4421
- Volume :
- 131
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Journal of bioscience and bioengineering
- Publication Type :
- Academic Journal
- Accession number :
- 33757751
- Full Text :
- https://doi.org/10.1016/j.jbiosc.2021.01.010