naa a22 4500 510818862 CHVBK 20180411083521.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s11814-012-0100-6 doi (NATIONALLICENCE)springer-10.1007/s11814-012-0100-6 Simultaneous autotrophic & heterotrophic denitrification by the injection of reformed spent sulfidic caustic (SSC) in a pilot-scale sewage treatment plant [Elektronische Daten] [Jae-Ho Lee, Jeung-Jin Park, Kyo-Seong Seo, Gi-Choong Choi, Tae-Ho Lee] Spent sulfidic caustic (SSC), produced from petroleum plants, contains high levels of H2S and alkalinity. It can be used to denitrify nitrate-nitrogen via a biological nitrogen removal process, as both the electron donor and buffering agent for sulfur-based autotrophic denitrification. However, SSC also contains some recalcitrant organic compounds such as BTEX, so it has to be refined. To remove BTEX, air stripping was conducted in a laboratory scale, and as a result, over 93% of the BTEX were removed within 30min. For the reformation of the refined SSC, Na2S2O3 · 5H2O, methanol and organic material, produced from a biodiesel production plant, were supplemented, and referred to as new sulfidic caustic I (NSCI), II (NSCII), III (NSCIII), respectively. Thereafter, these products were applied to a modified Ludzack-Ettinger (MLE) process to evaluate their effects on the effluent COD and TN concentrations. As a result, there was no increase in the COD level on the injection of NSC due to the removal of BTEX via air stripping. In addition, compared to no NSC injection, 44.0% more TN was removed with an injection of NSC III, which were the most effective conditions. Thus, the application of NSC to the biological nitrogen removal process was successfully performed. These results may contribute to the development of resource recovery technology. Korean Institute of Chemical Engineers, Seoul, Korea, 2012 Autotrophic Denitrification nationallicence Spent Sulfidic Caustic nationallicence New Sulfidic Caustic nationallicence Biological Nitrogen Removal nationallicence Modified Ludzack-Ettinger Process nationallicence Lee Jae-Ho SU Engineering Co., Ltd., 626-800, Yangsan, Korea aut Park Jeung-Jin SU Engineering Co., Ltd., 626-800, Yangsan, Korea aut Seo Kyo-Seong Small and Medium Business Administration, 704-833, Daegu, Korea aut Choi Gi-Choong SU Engineering Co., Ltd., 626-800, Yangsan, Korea aut Lee Tae-Ho School of Civil and Environmental Engineering, Pusan National University, 609-735, Busan, Korea aut Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/1(2013-01-01), 139-144 0256-1115 30:1<139 2013 30 11814 https://doi.org/10.1007/s11814-012-0100-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11814-012-0100-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lee Jae-Ho SU Engineering Co., Ltd., 626-800, Yangsan, Korea aut NATIONALLICENCE 700 1- Park Jeung-Jin SU Engineering Co., Ltd., 626-800, Yangsan, Korea aut NATIONALLICENCE 700 1- Seo Kyo-Seong Small and Medium Business Administration, 704-833, Daegu, Korea aut NATIONALLICENCE 700 1- Choi Gi-Choong SU Engineering Co., Ltd., 626-800, Yangsan, Korea aut NATIONALLICENCE 700 1- Lee Tae-Ho School of Civil and Environmental Engineering, Pusan National University, 609-735, Busan, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer US; http://www.springer-ny.com 30/1(2013-01-01), 139-144 0256-1115 30:1<139 2013 30 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer