Optimal Conditions for Bio-Oxidation of Biodesulfurization in Natural Gas Sweetening Process Using Thiobacillus

Abstract:

Hydrogen sulfide is a common composition of natural gas. It is an important problem to develop suitable natural gas desulfurization technology for the present situation of China. Now, a novel process of H₂S abatement from gas streams has been investigated for chemical absorption of H₂S using a weak alkaline solution followed by the oxidation of the absorbed sulfide to elemental sulfur by naturally occurring microorganisms and alkaline solution regeneration for recycle and reuse in the process. This method is currently attracting more and more interests of researchers, because it requires little equipment, is inexpensive and produces only elemental sulfur, thus minimizing the production of pollutants. The biological oxidation process of the absorbed sulfides to elemental sulfur by Thiobacillus thioparus TYY-1 was studied in an airlift-loop reactor (effective volume=20L).Two efficiency factors including hydraulic remain time and the air aeration quantity were inspected. The air aeration quantity is key influence factor of desulfuration rate and elemental sulfur production rate. The investigation demonstrated that the optimum hydraulic remain time was 4—6h under the influent concentration of S^2- for 200 mg/L, and the best treatment effect of aeration was obtained at 120 —160L/h. With these conditions after 20 days of operation, the result showed superior performance of the bioreactor for desulfuration rate and elemental sulfur production rate, the conversion products were mainly sulfur and the production rate of SO₄^2- was low. The removal efficiency of sulfide was more than 99.5% while the maximum yield of sulfur was 88% approximately.

• Periodical: Advanced Materials Research (Volume 1104)
• Pages: 57-60
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1104.57
• Online since: May 2015
• Authors: Qi Song Liu*, Bo Xu, Jin Long He, Ru Sun, Hong Gang Chang
• Keywords: Aeration, Biodesulfurization, Bio-Oxidation, Hydraulic Retention Time, Hydrogen Sulfide, Thiobacillus thioparus

References

[1] P. Oyarzún, F. Arancibia, C. Canales and G.E. Aroca: Process Biochem, (2003) No. 39, p.165.

[2] G Busca and C. Pistarino: Journal of Loss Prevention in the Process Industries, (2003) No. 16, p.363.

[3] B. Sercu, D. Núñez, V.H. Langenhove, G. Aroca and W. Verstraete: Biotechnology and Bioengineering, Vol. 90 (2005) No. 2, p.259.

[4] A. A. Elias, R. Cavana and L. Jackson: R&D Management, Vol. 32 (2002) No. 4, p.301.

[5] J.Y. Kim, S.J. Chung and Q. Xie: Air & Waste Management Association (2002) No. 52. p.1389.

[6] M. A. Syed and P.F. Henshaw: Water Research, Vol. 37 (2003) No. 8, p. (1932).

[7] X. Ye, J. Kuang, X. Li, G. Tang. Microstructure, properties and temperature evolution of electro-pulsing treated functionally graded Ti–6Al–4V alloy strip. Journal Of Alloys And Compounds. 599 (2014) 1-9.

DOI: 10.1016/j.jallcom.2014.02.055

[8] X. Ye, G. Tang, G. Song, J. Kuang. Effect of electropulsing treatment on the microstructure, texture, and mechanical properties of cold-rolled Ti–6Al–4V alloy. Journal Of Materials Research. 29 (2014) 1500-12.

DOI: 10.1557/jmr.2014.171

[9] X. Ye, X. Li, G. Song, G. Tang. Effect of recovering damage and improving microstructure in the titanium alloy strip under high-energy electropulses. Journal Of Alloys And Compounds. 616 (2014) 173-83.

DOI: 10.1016/j.jallcom.2014.07.143

[10] X. Ye, Y. Ye, G. Tang. Effect of electropulsing treatment and ultrasonic striking treatment on the mechanical properties and microstructure of biomedical ti-6Al-4V alloy. Journal of the Mechanical Behavior of Biomedical Materials. 40 (2014).

DOI: 10.1016/j.jmbbm.2014.08.022

[11] A.A. Ramirez, J. Peter Jones and M. Heitz: Canadian Journal of Civil Engineering, Vol. 36 (2009) No. 12, p. (1911).

[12] J. S. Devinny, M. A. Deshusses and T. S. Webster: Biofiltration for Air Pollution Control (Lewis Publishers,U. S 1999).

[13] M.L. Prescott, P. J. Harley and A. D. Klein: Microbiology, 5th edition(McGraw-Hill Companies.U. S 2003).

[14] Janssen, A.J.H., R. Sleyster, C.V.D. Kaa, A. Jochemsen, J. Bontsema and G. Lettinga: Biotechnology Bioengineering (1995). No. 47, p.327.

DOI: 10.1002/bit.260470307

[15] P.L.F. van den Bosch, M. de Graaff, M. Fortuny-Picornell, R.C. van Leeradm and A.J.H. Janssen, Appl. Microbiol. Biot, (2009) No. 83, p.579.

DOI: 10.1007/s00253-009-1951-6

[16] H Prasad Raju, Sk Masud Hossain, N Anatharaman and Manas Das: Journal of Scientific & Industrial Research Vol. 68 (2009) p.406.