Fluidized bed reactor for the biological treatment of ion-exchange brine containing perchlorate and nitrate

Water Research
A PatelD J Roberts

Abstract

The removal of perchlorate and nitrate from contaminated drinking water using regenerable ion-exchange processes produces a high salt brine (3-10% NaCl) laden with high concentrations of perchlorate and nitrate. This bench-scale research describes the operation of acetate-fed granular activated carbon (GAC) based fluidized bed reactors (FBR) for perchlorate-only, and combined nitrate and perchlorate removal from synthetic brine (6% NaCl). The GAC was inoculated with a salt-tolerant culture developed by the authors and used previously in batch systems. An FBR was an effective design for perchlorate reduction and exhibited first-order degradation kinetics with respect to perchlorate concentrations. Nitrate was also removed by the organisms in the column and had no negative effects on the removal of perchlorate using the FBR design. However, at higher concentrations of nitrate the FBR was more difficult to operate due to loss of carbon and biomass from the formation of nitrogen bubbles and the high recycle flow rates needed.

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Citations

May 6, 2014·Journal of Environmental Management·Zichao WangCongcong Zhao
Dec 20, 2013·Environmental Technology·Anupama Vijaya NadarajaKrishnakumar Bhaskaran
Jun 25, 2013·Environmental Science & Technology·Yeyuan Xiao, Deborah J Roberts
Sep 28, 2010·Bioresource Technology·Seong Jin NorHee Wook Ryu
Jul 24, 2015·Environmental Science and Pollution Research International·Sang-Hoon LeeByong-Hun Jeon
Jan 30, 2015·Environmental Science and Pollution Research International·Mengchun GaoYun Ren
Jun 12, 2010·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Jinwook ChungJeill Oh
Apr 26, 2019·Environmental Science and Pollution Research International·Li HeQi Yang

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