An analysis of CH4/N2 rich biogas production, fuel treatment process and microturbine application

Jungkeuk Park; Kwangbeom Hur; Sanggyu Rhim; Ho Kang

Korean Journal of Chemical Engineering, Vol.28, No.1, 126-132, January, 2011

DOI10.1007/s11814-010-0329-x Export Citation

An analysis of CH4/N2 rich biogas production, fuel treatment process and microturbine application

Jungkeuk Park^†, Kwangbeom Hur, Sanggyu Rhim, and Ho Kang¹

Green Growth Lab., Korea Electric Power Research Institute, Daejeon 305-380, Korea
¹Department of Environmental Engineering, Chungnam National University, Daejeon 305-764, Korea

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Biogas usually contains CH4 and CO2 as main components with the ratio of 6 : 4, and its composition varies with wide range depending on digester conditions. In addition to concentration change of each constituent, biogas composition could be changed due to the variations in the organic matter treatment process. The aim of the study is to analyze the production and application to a microturbine system of CH4/N2 rich biogas produced from Gong-Ju wastewater treatment plant. CH4/N2 rich biogas is produced due to the internal wastewater recirculation. The internal wastewater recirculation is intended to enhance NO3- removal without additional carbon source input. As a result, the digester was shown to be the highest contributor for nitrogen removal and average CH4 concentration was lowered compared to the typical biogas composition. Nitrate removal rate was influenced by the internal recirculation ratio. Content of N2 has no effect on biogas clean-up system performance. Besides, adaptability of CH4/N2 rich biogas to microturbine was satisfactory with very low NOx and SO2 concentration in microturbine exhaust gas. Influence of high N2 concentration of biogas on NOx concentration was limited due to the low combustion temperature.

Keywords:Biogas;Anaerobic Digestion;Microturbine;Livestock Wastewater;Wastewater Recirculation

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[2] Akunna J, Bizeau C, Moletta R, Bernet N, Heduit A, Water Sci. Technol., 297-306 305, 30 (1994)

[3] Rousseau P, Steyer JP, Volcke EIP, Bernet N, Beline F, Water Sci. Technol., 58, 133 (2008)

[4] An YY, Yang FL, Chua HC, Wong FS, Wu B, Bioresour. Technol., 99(9), 3714 (2008)

[5] Littlejohn D, Majeski AJ, Tonse S, Castaldini C, Cheng RK, Proc. Combust. Inst., 29, 1115 (2002)

[6] Cohe C, Chauveau C, Gokalp I, Kurtulusb DF, Proc. Combust. Inst., 32, 1803 (2008)

[7] Il Seo J, Il Kim N, Shin HD, Combust. Flame, 153(3), 355 (2008)

[8] Kumar P, Mishra DP, Energy Conv. Manag., 49(10), 2698 (2008)

[9] Fujimori T, Riechelmann D, Sato J, Symp. (Int.) Combust., 27, 1153 (1998)

[10] Zeeuw WD, Lettinga G, Accumulation of digested sewage sludge during start-up of an upflow anaerobic sludge blanket reactor., Proc. of 35th Perdue industrial waste conference, Lewis publishers, Chelsen, MI, 39-47 (1980)

[11] LO KV, LIAO PH, GAO YC, Bioresour. Technol., 47(2), 153 (1994)

[12] McDonald CF, Appl. Therm. Eng., 23, 1467 (2003)

[13] Pilavachi PA, Appl. Therm. Eng., 22, 2005 (2002)

[14] Wilson DA, Lyons KM, Fuel., 87, 406 (2008)

[15] Wellinger A, Lindberg A, Biogas upgrading and utilization., IEA Bioenergy Task 24 (1999)

[16] Deed C, Gronow J, Rosevear A, Braithwaite P, Smith R, Stanley P, Guidance on gas treatment technologies for landfill gas engines., Environment Agency (2004)

[17] Dewil R, Appels L, Baeyens J, Energy Convers. Manage., 47, 1718 (2006)

[18] Walker JF, Helfrich MV, Donalson TL, Environ. Progr., 8, 97 (1989)

[19] Bernet N, Delegenes N, Akunna JC, Delegenes JP, Moleta R, Water Res., 34, 611 (2000)

[20] Jeong BM, Ahn ES, Yun JH, Lee CH, Choi DK, Sep. Purif. Technol., 55(3), 335 (2007)

[21] Petrov AY, Zaltash A, Rizy DT and Labinov SD, Proc. of 19th Annual International Pittsburgh Conference, September 23-27, 2002, Pittsburgh, PA (2002)