Journal: Environmental Technology 

Authors: Ji M.-K.; Ahn Y.-T.; Ali Khan M.; Abou-Shanab R.A.I.; Cho Y.; Choi J.-Y.; Je Kim Y.; Song H.; Jeon B.-H.

Abstract:

The feasibility of hybrid systems for simultaneous removal of nitrate (NO3-) and ammonium ions (NH4+) from livestock wastewater was examined in batch experiments. As a part of efforts to remove nitrate and ammonium simultaneously, Fe and adsorbents including coconut-based granular activated carbon (GAC), sepiolite and filtralite were used. Various parameters such as adsorbent dosages and temperature were studied. Removal of NO3- increased with increase in temperature. Maximum NO3- removal (85.3%) was observed for the Fe-filtralite hybrid system at 45C for a 24h reaction time. Increase in GAC and sepiolite dosages had significant (P<0.01) effect on the NH4 + removal efficiency, which was primarily due to the net negative surface charge of the adsorbents. The efficiency of hybrid systems for the removal of NO3- was in the order of filtralite> sepiolite>GAC, and the order of the removal of NH4+ was GAC>sepiolite>filtralite. The results of the present study suggest that the use of hybrid systems could be a promising innovative technology for achieving simultaneous removal of NO3- and NH 4+ from livestock wastewater. © 2011 Copyright Taylor and Francis Group, LLC.

Keywords: Fe; filtralite; granular activated carbon; livestock wastewater; sepiolite

DOI: https://doi.org/10.1080/09593330.2011.565079