Back to Search
Start Over
Immobilization of nitrite oxidizing bacteria using biopolymeric chitosan media
- Source :
- Journal of environmental sciences (China). 25(2)
- Publication Year :
- 2013
-
Abstract
- The effects of chitosan characteristics including the degree of deacetylation, molecular weight, particle size, pH pretreatment and immobilization time on the immobilization of nitrite-oxidizing bacteria (NOB) on biopolymeric chitosan were investigated. Nitrite removal efficiency of immobilized NOB depended on the degree of deacetylation, particle size, pH pretreatment on the surface of chitosan and immobilization time. Scanning electron microscope characterization illustrated that the number of NOB cells attached to the surface of chitosan increased with an increment of immobilization time. The optimal condition for NOB immobilization on chitosan was achieved during a 24-hr immobilization period using chitosan with the degree of deacetylation larger than 80% and various particle size ranges between 1-5 mm at pH 6.5. In general, the NOB immobilized on chitosan flakes has a high potential to remove excess nitrite from wastewater and aquaculture systems.
- Subjects :
- Environmental Engineering
Scanning electron microscope
Inorganic chemistry
Microbial metabolism
macromolecular substances
Chitosan
chemistry.chemical_compound
Oxidizing agent
Environmental Chemistry
Nitrite
Nitrites
General Environmental Science
biology
Bacteria
Chemistry
technology, industry, and agriculture
General Medicine
Hydrogen-Ion Concentration
equipment and supplies
biology.organism_classification
carbohydrates (lipids)
Molecular Weight
Wastewater
Particle size
Nuclear chemistry
Subjects
Details
- ISSN :
- 10010742
- Volume :
- 25
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Journal of environmental sciences (China)
- Accession number :
- edsair.doi.dedup.....9c8d7ed885d8010881223bd3b8f208e1