The use of silica gel prepared by sol-gel method and polyurethane foam as microbial carriers in the continuous degradation of phenol
Jazyk angličtina Země Německo Médium print
Typ dokumentu časopisecké články, práce podpořená grantem
PubMed
10968628
DOI
10.1007/s002530000366
Knihovny.cz E-zdroje
- MeSH
- biodegradace MeSH
- biomasa MeSH
- bioreaktory * MeSH
- fenoly metabolismus MeSH
- imobilizované buňky * MeSH
- kultivační média MeSH
- kvasinky metabolismus MeSH
- Moraxella metabolismus MeSH
- Ochrobactrum anthropi metabolismus MeSH
- oxid křemičitý MeSH
- polyurethany MeSH
- Proteobacteria metabolismus MeSH
- silikagel MeSH
- Stenotrophomonas maltophilia metabolismus MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- Názvy látek
- fenoly MeSH
- kultivační média MeSH
- oxid křemičitý MeSH
- polyurethane foam MeSH Prohlížeč
- polyurethany MeSH
- silikagel MeSH
A mixed microbial culture was immobilized by entrapment into silica gel (SG) and entrapment/ adsorption on polyurethane foam (PU) and ceramic foam. The phenol degradation performance of the SG biocatalyst was studied in a packed-bed reactor (PBR), packed-bed reactor with ceramic foam (PBRC) and fluidized-bed reactor (FBR). In continuous experiments the maximum degradation rate of phenol (q(s)max) decreased in the order: PBRC (598 mg l(-1) h(-1)) > PBR (PU, 471 mg l(-1)h(-1)) > PBR(SG, 394 mg l(-1) h(-1)) > FBR (PU, 161 mg l(-1) h(-1)) > FBR (SG, 91 mg l(-1) h(-1)). The long-term use of the SG biocatalyst in continuous phenol degradation resulted in the formation of a 100-200 microm thick layer with a high cell density on the surface of the gel particles. The abrasion of the surface layer in the FBR contributed to the poor degradation performance of this reactor configuration. Coating the ceramic foam with a layer of cells immobilized in colloidal SiO2 enhanced the phenol degradation efficiency during the first 3 days of the PBRC operation, in comparison with untreated ceramic packing.
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