Denitrification using a membrane-immobilized biofilm

Journal Article · Wed Mar 01 04:00:00 EST 1995 · Journal of the American Water Works Association; (United States)

OSTI ID:6487444

McCleaf, P R ^[1]; Schroeder, E D ^[2]

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1. Cresenta Valley County Water District, La Cresenta, CA (United States)
2. 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), Journal Name: Journal of the American Water Works Association; (United States) Vol. 87:3; ISSN 0003-150X; ISSN JAWWA5
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
BIODEGRADATION
BIOREACTORS
CHEMICAL REACTIONS
CONTROL
DECOMPOSITION
DENITRIFICATION
DRINKING WATER
HYDROGEN COMPOUNDS
IMMOBILIZED CELLS
NITRATES
NITROGEN COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION CONTROL
TECHNOLOGY ASSESSMENT
WATER
WATER POLLUTION CONTROL