Denitrification using a membrane-immobilized biofilm
- Cresenta Valley County Water District, La Cresenta, CA (United States)
- Univ. of California, Davis, CA (United States). Dept. of Civil and Environmental Engineering
Immobilized bacterial cell technology was applied, on a bench scale, to the selective removal of nitrate from contaminated water, together with the segregation of denitrifying bacteria and the carbon energy source from the treated water. The two-chambered reactor, with a microporous membrane for bacterial cell immobilization, performed at an average denitrification rate of 5,800 mg nitrate-nitrogen (NO[sub 3][sup [minus]]-N)/m[sup 2]/d of membrane surface area. A carbon-to-nitrogen mass consumption ratio of 2.2 g organic carbon/gram nitrogen was observed, with a small degree of methanol contamination of the water being treated. A physical model for NO[sub 3][sup [minus]]-N removal based on Fick's law and the measured diffusion coefficient of nitrate through the immobilization structure gave a good correlation with experimental results.
- OSTI ID:
- 6487444
- Journal Information:
- Journal of the American Water Works Association; (United States), Vol. 87:3; ISSN 0003-150X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
DRINKING WATER
DENITRIFICATION
NITRATES
BIODEGRADATION
BIOREACTORS
IMMOBILIZED CELLS
TECHNOLOGY ASSESSMENT
WATER POLLUTION CONTROL
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
WATER
540220* - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)