Kinetics of nitrate and perchlorate reduction in ion-exchange brine using the membrane biofilm reactor (MBfR)

Water Research
Steven W Van GinkelBruce E Rittmann

Abstract

Several sources of bacterial inocula were tested for their ability to reduce nitrate and perchlorate in synthetic ion-exchange spent brine (30-45 g/L) using a hydrogen-based membrane biofilm reactor (MBfR). Nitrate and perchlorate removal fluxes reached as high as 5.4 g Nm(-2)d(-1) and 5.0 g ClO(4)m(-2)d(-1), respectively, and these values are similar to values obtained with freshwater MBfRs. Nitrate and perchlorate removal fluxes decreased with increasing salinity. The nitrate fluxes were roughly first order in H(2) pressure, but roughly zero-order with nitrate concentration. Perchlorate reduction rates were higher with lower nitrate loadings, compared to high nitrate loadings; this is a sign of competition for H(2). Nitrate and perchlorate reduction rates depended strongly on the inoculum. An inoculum that was well acclimated (years) to nitrate and perchlorate gave markedly faster removal kinetics than cultures that were acclimated for only a few months. These results underscore that the most successful MBfR bioreduction of nitrate and perchlorate in ion-exchange brine demands a well-acclimated inoculum and sufficient hydrogen availability.

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Citations

Jul 29, 2010·Environmental Technology·Yeyuan Xiao, Deborah J Roberts
Nov 15, 2011·Water Research·Mohamadali Sharbatmaleki, Jacimaria R Batista
Aug 14, 2010·Water Research·Youneng TangBruce E Rittmann
Aug 16, 2015·Journal of Colloid and Interface Science·Zhongfei RenWen Song
Oct 25, 2011·Bioresource Technology·Hee Wook RyuKang In Rhee
Jan 19, 2011·Microbiological Research·Nirmala Bardiya, Jae-Ho Bae
Apr 3, 2007·Current Opinion in Biotechnology·Anne M HenstraAlfons J M Stams
Apr 10, 2015·Biotechnology and Bioengineering·Kelly J MartinRobert Nerenberg
Jun 12, 2010·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Jinwook ChungJeill Oh
Jan 29, 2019·Frontiers in Microbiology·Chen ZhouBruce E Rittmann
Apr 26, 2019·Environmental Science and Pollution Research International·Li HeQi Yang
Sep 21, 2016·Environmental Science and Pollution Research International·Yin ZhangHe-Ping Zhao

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