Simultaneous autotrophic & heterotrophic denitrification by the injection of reformed spent sulfidic caustic (SSC) in a pilot-scale sewage treatment plant

Jae-Ho Lee; Jeung-Jin Park; Kyo-Seong Seo; Gi-Choong Choi; Tae-Ho Lee

Korean Journal of Chemical Engineering, Vol.30, No.1, 139-144, January, 2013

DOI10.1007/s11814-012-0100-6 Export Citation

Simultaneous autotrophic & heterotrophic denitrification by the injection of reformed spent sulfidic caustic (SSC) in a pilot-scale sewage treatment plant

Jae-Ho Lee, Jeung-Jin Park, Kyo-Seong Seo¹, Gi-Choong Choi, and Tae-Ho Lee^{2, †}

SU Engineering Co., Ltd., Yangsan 626-800, Korea
¹Small and Medium Business Administration, Daegu 704-833, Korea
²School of Civil and Environmental Engineering, Pusan National University, Busan 609-735, Korea

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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.

Keywords:Autotrophic Denitrification;Spent Sulfidic Caustic;New Sulfidic Caustic;Biological Nitrogen Removal;Modified Ludzack-Ettinger Process

[References]

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Park JJ, Park SR, Ju DJ, An JK, Byun IG, Park TJ, Korean J. Chem. Eng., 25(3), 542 (2008)
Sheu SH, Weng HS, Water Res., 35(8), 2017 (2001)
Sipma J, Svitelskaya A, van der Mark B, Pol LWH, Lettinga G, Buisman CJN, Janssen AJH, Water Res., 38, 4331 (2004)
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Claus G, Kutzner HJ, Appl. Microbiol. Biotechnol., 22, 289 (1985)
Oh SE, Kim KS, Choi HC, Cho J, Kim IS, Water Sci.Technol., 42(3-4), 59 (2000)
Wiesmann U, Springer-Verlag, Berlin, Germany, 51, 113 (1994)

[Referenced By]

[1] Oh SE, Yoo YB, Young JC, Kim IS, J. Biotechnol., 92, 1 (2001)

[2] Zhang TC, Lampe DG, Water Res., 33(3), 599 (1999)

[3] Flere JM, Zhang TC, J. Environ. Eng., 8, 721 (1999)

[4] van der Hock JP, Kappelhof JWNM, Hijen WAM, J.Chem. Technol. Biotechnol., 54, 197 (1992)

[5] Liu LH, Koenig A, Process Biochem., 37, 885 (2002)

[6] Park JJ, Park SR, Ju DJ, An JK, Byun IG, Park TJ, Korean J. Chem. Eng., 25(3), 542 (2008)

[7] Sheu SH, Weng HS, Water Res., 35(8), 2017 (2001)

[8] Sipma J, Svitelskaya A, van der Mark B, Pol LWH, Lettinga G, Buisman CJN, Janssen AJH, Water Res., 38, 4331 (2004)

[9] Robert PV, Dandliker PG, Environ. Sci. Technol., 17, 484 (1983)

[10] APHA, American Public Health Association, Washington DC, USA (1998)

[11] Hsieh CC, J. Hazard. Mater., B79, 173 (2000)

[12] Villaverde S, Garcia-Encina PA, Fdz-Polanco F, Water Res., 31, 1180 (1997)

[13] Lee SH, Lee JH, Kim DG, Lee CS, Kang KS, Kim IH, Korean Chem. Eng. Res., 46(5), 971 (2008)

[14] Wei YS, Van Houten RT, Borger AR, Eikelboom YB, Water Res., 37, 4453 (2003)

[15] Claus G, Kutzner HJ, Appl. Microbiol. Biotechnol., 22, 289 (1985)

[16] Oh SE, Kim KS, Choi HC, Cho J, Kim IS, Water Sci.Technol., 42(3-4), 59 (2000)

[17] Wiesmann U, Springer-Verlag, Berlin, Germany, 51, 113 (1994)