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

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ID: 87274
2020
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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 (HS). In this study, an immobilized media of sulfur-oxidizing bacteria (SOB) was used to remove the HS. 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 HS 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 HS removal efficiency was compared between with and without SOB media. The maximum HS elimination capacity with SOB media was 12.3 g/m/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 HS removal in STBW.
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kang2020removalinternational Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Kang, Jeong-Hee;Namgung, Hyeong-Gyu;Cho, Jeong-Il;Yoo, Sung Soo;Lee, Bong-Jae;Ji, Houn Wook;
Journal International journal of environmental research and public health
Year 2020
DOI
E684
URL
Keywords
bioreactor hydrogen sulfide black water odor management septic tank

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