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Title: Denitrification incorporating microporous membranes

Abstract

A microbial system for removal of nitrate from drinking water in which the denitrification reactions are physically separated from the water being treated by a microporous membrane was studied. The experimental system was composed of two equal-volume cells separated by a 0.02 {mu}m pore size polytetrafluoroethylene membrane. No pressure difference existed across the membrane, and nitrate ions were transported through the membrane by diffusion. Results of experiments with biofilm denitrification and suspended-culture systems are presented. Deoxygenation by N{sub 2} stripping and by SO{sub 3}{sup {minus}2} produced equivalent results. Removal rates with the suspended culture systems were greater than those with biofilms. Effective membrane diffusivities calculated for suspended-culture systems were approximately the same as for sterile systems, indicating that resistance to transport was not changed by the addition of the suspended microbial culture. The methanol requirement observed in the experiments was 1.4 g total organic carbon (TOC) per g NO{sub 3}{sup {minus}}-N removed. Removal rates followed first-order pseudotransport controlled models for both the biofilm and suspended-culture systems. A prototype continuous-flow system is presented.

Authors:
;  [1]
  1. Univ. of California, Davis, CA (United States). Dept. of Civil and Environmental Engineering
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
267986
Resource Type:
Journal Article
Journal Name:
Journal of Environmental Engineering
Additional Journal Information:
Journal Volume: 122; Journal Issue: 7; Other Information: PBD: Jul 1996
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; DRINKING WATER; DENITRIFICATION; NITRATES; BIODEGRADATION; WATER POLLUTION CONTROL; BIOREACTORS

Citation Formats

Reising, A R, and Schroeder, E D. Denitrification incorporating microporous membranes. United States: N. p., 1996. Web. doi:10.1061/(ASCE)0733-9372(1996)122:7(599).
Reising, A R, & Schroeder, E D. Denitrification incorporating microporous membranes. United States. https://doi.org/10.1061/(ASCE)0733-9372(1996)122:7(599)
Reising, A R, and Schroeder, E D. 1996. "Denitrification incorporating microporous membranes". United States. https://doi.org/10.1061/(ASCE)0733-9372(1996)122:7(599).
@article{osti_267986,
title = {Denitrification incorporating microporous membranes},
author = {Reising, A R and Schroeder, E D},
abstractNote = {A microbial system for removal of nitrate from drinking water in which the denitrification reactions are physically separated from the water being treated by a microporous membrane was studied. The experimental system was composed of two equal-volume cells separated by a 0.02 {mu}m pore size polytetrafluoroethylene membrane. No pressure difference existed across the membrane, and nitrate ions were transported through the membrane by diffusion. Results of experiments with biofilm denitrification and suspended-culture systems are presented. Deoxygenation by N{sub 2} stripping and by SO{sub 3}{sup {minus}2} produced equivalent results. Removal rates with the suspended culture systems were greater than those with biofilms. Effective membrane diffusivities calculated for suspended-culture systems were approximately the same as for sterile systems, indicating that resistance to transport was not changed by the addition of the suspended microbial culture. The methanol requirement observed in the experiments was 1.4 g total organic carbon (TOC) per g NO{sub 3}{sup {minus}}-N removed. Removal rates followed first-order pseudotransport controlled models for both the biofilm and suspended-culture systems. A prototype continuous-flow system is presented.},
doi = {10.1061/(ASCE)0733-9372(1996)122:7(599)},
url = {https://www.osti.gov/biblio/267986}, journal = {Journal of Environmental Engineering},
number = 7,
volume = 122,
place = {United States},
year = {Mon Jul 01 00:00:00 EDT 1996},
month = {Mon Jul 01 00:00:00 EDT 1996}
}