This work compares a pilot-scale H2-based membrane biofilm reactor (MBfR) and a pilot-scale packed-bed heterotrophic reactor (PBHR) for denitrification of nitrate-contaminated groundwater. The comparison includes the effluent water quality of the denitrification reactors (NO3−, NO2−, dissolved oxygen, SO42−, (biodegradable) dissolved organic carbon, heterotrophic plate counts (HPC), turbidity, NH4+, and pH), and the impact of post-treatment on water quality. At the same nitrate carrier-surface loading, effluent water quality was generally better directly from the MBfR than from the PBHR. However, post treatment including an ozone-contact tank and a post-filter brought the finished-water quality for both systems to roughly the same level, which met all drinking water standards except for HPC.
Comparing heterotrophic and hydrogen-based autotrophic denitrification reactors for effluent water quality and post-treatment
Youneng Tang, Michal Ziv-El, Kerry Meyer, Chen Zhou, Jung Hun Shin, Chang Hoon Ahn, James McQuarrie, Daniel Candelaria, Paul Swaim, Rick Scott, Bruce E. Rittmann; Comparing heterotrophic and hydrogen-based autotrophic denitrification reactors for effluent water quality and post-treatment. Water Science and Technology: Water Supply 1 March 2012; 12 (2): 227–233. doi: https://doi.org/10.2166/ws.2012.138
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