Abstract
A highly porous nylon biocarrier was developed to support immobilized bacteria in bioreactors used to treat liquid wastes. Porosity analyses and scanning electron microscopy showed microbial colonization of accessible pores typically in the range of 100 to 1,200 (mu)m, with some as large as 3.9 mm. A bench-scale packed-bed reactor achieved a p-nitrophenol (PNP) removal rate of 5.95 kg of PNP m(sup-3) day(sup-1) for wastes containing 1,200 mg of PNP liter(sup-1). Complete mixing of the biocarrier bed to remove excess surface biomass was routinely achieved with simple air injection. These porous polymer biocarriers are promising as microbial supports in liquid-waste treatment and bioremediation applications.
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Selected References
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- Durham D. R., Marshall L. C., Miller J. G., Chmurny A. B. Characterization of Inorganic Biocarriers That Moderate System Upsets during Fixed-Film Biotreatment Processes. Appl Environ Microbiol. 1994 Sep;60(9):3329–3335. doi: 10.1128/aem.60.9.3329-3335.1994. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Durham D. R., Marshall L. C., Miller J. G., Chmurny A. B. New composite biocarriers engineered to contain adsorptive and ion-exchange properties improve immobilized-cell bioreactor process dependability. Appl Environ Microbiol. 1994 Nov;60(11):4178–4181. doi: 10.1128/aem.60.11.4178-4181.1994. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Hallas L. E., Adams W. J., Heitkamp M. A. Glyphosate degradation by immobilized bacteria: field studies with industrial wastewater effluent. Appl Environ Microbiol. 1992 Apr;58(4):1215–1219. doi: 10.1128/aem.58.4.1215-1219.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Heitkamp M. A., Adams W. J., Hallas L. E. Glyphosate degradation by immobilized bacteria: laboratory studies showing feasibility for glyphosate removal from waste water. Can J Microbiol. 1992 Sep;38(9):921–928. doi: 10.1139/m92-149. [DOI] [PubMed] [Google Scholar]
- Heitkamp M. A., Camel V., Reuter T. J., Adams W. J. Biodegradation of p-nitrophenol in an aqueous waste stream by immobilized bacteria. Appl Environ Microbiol. 1990 Oct;56(10):2967–2973. doi: 10.1128/aem.56.10.2967-2973.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
- LEADBETTER E. R., FOSTER J. W. Studies on some methane-utilizing bacteria. Arch Mikrobiol. 1958;30(1):91–118. doi: 10.1007/BF00509229. [DOI] [PubMed] [Google Scholar]
- Shimp R. J., Pfaender F. K. Effects of surface area and flow rate on marine bacterial growth in activated carbon columns. Appl Environ Microbiol. 1982 Aug;44(2):471–477. doi: 10.1128/aem.44.2.471-477.1982. [DOI] [PMC free article] [PubMed] [Google Scholar]