Removal of Hydrogen Sulfide in Septic Tanks for Treating Black Water via an Immobilized Media of Sulfur-Oxidizing Bacteria

Jeong-Hee Kang, Hyeong-Gyu Namgung, Jeong-Il Cho, Sung Soo Yoo, Bong-Jae Lee and Hyon Wook Ji
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Jeong-Hee Kang: Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang, Gyeonggi-Do 10233, Korea
Hyeong-Gyu Namgung: New Tech. Research Department, Korea District Heating Corporation, 92, Gigok-Ro, Giheung-Gu, Gyeonggi-Do 17099, Korea
Jeong-Il Cho: Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang, Gyeonggi-Do 10233, Korea
Sung Soo Yoo: Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang, Gyeonggi-Do 10233, Korea
Bong-Jae Lee: Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang, Gyeonggi-Do 10233, Korea
Hyon Wook Ji: Department of Land, Water and Environment Research, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdae-Ro, Ilsanseo-Gu, Goyang, Gyeonggi-Do 10233, Korea

IJERPH, 2020, vol. 17, issue 3, 1-12

Abstract: In South Korea, the installation of septic tanks for treating black water (STBW) is regulated even in sewage treatment areas to prevent the black water deposition in combined sewers. STBWs in which black water is anaerobically decomposed generate high concentrations of hydrogen sulfide (H 2 S). In this study, an immobilized media of sulfur-oxidizing bacteria (SOB) was used to remove the H 2 S. SOB media was prepared by using activated sludge collected from a wastewater treatment plant. Prior to field application, an appropriate cultivation period and aeration rate for SOB activation were estimated through a laboratory-scale test. The SOB was activated after a 23-day cultivation period and an aeration rate of 0.25 L-water/L-air/min. Moreover, the maximum H 2 S removal efficiency was observed at a cultivation period of 43 days and an aeration rate of 0.38 L-water/L-air/min. Then, the SOB media was installed on STBWs of various capacities. The H 2 S removal efficiency was compared between with and without SOB media. The maximum H 2 S elimination capacity with SOB media was 12.3 g/m 3 /h, which was approximately three times higher than without SOB media. Furthermore, the energy efficiency and oxidation rate were also three times higher with SOB, demonstrating the applicability of SOB for H 2 S removal in STBW.

Keywords: hydrogen sulfide; septic tank; odor management; black water; bioreactor (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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