Improving Biogas Quality through Circulated Water Scrubbing Method

Abstract:

The dependence of human being on fossil fuels has decreased significantly the conventional energy resources. To overcome this problem it is required alternative substitute fuels which are cheap and accessible which biogas is one of the fuels. Nevertheless, the use of biogas has not yet been maximized because of the low calorific value which is produced from the process without purification. The circulated water absorption method is one mean of effective biogas purification. Under this method it is expected to increase the level of methane (CH₄) and to reduce both the level of carbon dioxide (CO₂) and hydrogen sulfide (H₂S). In order to obtain the aim, the research was carried out under variations of water and biogas volumetric flow rate. The results show that the highest quality of biogas produced was under the variation of water volumetric flow rate of 15 lt/min with biogas volumetric flow rate of 1 lt/min which increased the level of methane (CH₄) from 59.36 % to 62.8 % and decreased the carbon dioxide (CO₂) content from 33.53 % to 26.8 %, and hydrogen sulfide (H₂S) from 208.33 to 86 ppm. Lower biogas and water volumetric rates allowed longer contact between biogas molecule and absorbent. This resulted in an opportunity for absorbent more active to dissolve carbon dioxide and hydrogen sulfide in biogas. These compounds then flowed outward of the scrubbing unit along with the absorbent. The research proved that the raw biogas purification by circulated water scrubbing method was an effective mean in enhancing the quality of biogas.

• Periodical: Applied Mechanics and Materials (Volume 776)
• Pages: 443-448
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.776.443
• Online since: July 2015
• Authors: Hendry Sakke Tira*, Yesung Allo Padang, Mirmanto Mirmanto, Hendriono Hendriono
• Keywords: Biogas, Biogas Purification, Water Scrubbing

References

[1] H.S. Tira, Impact of all alternative fuels and hydrogen-enriched gaseous fuel on combustion and emissions in diesel engines, PhD thesis, Birmingham, UK, (2013).

[2] A. Weiss, V. Jerome, D. Burghardt, L. Likke, S. Peiffer, E. M. Hofsetter, R Gabler, R. Freitag, Investigation of factors influencing biogas production in a large-scale thermophilic municipal biogas plant, Appl. Microbiol Biotechnol. 84 (2009).

DOI: 10.1007/s00253-009-2093-6

[3] Information on http: /www. regional. kompas. com.

[4] A. Sulistyo, Analisis Pemanfaatan Sampah Organik Di Pasar Induk Kramat Jati Sebagai Pembangkit Listrik Tenaga Biogas, Thesis, Depok, Indonesia, (2010).

[5] E.D. Aklaku, K. Jones, K Obiri-Danso, Integrated biological treatment and biogas production in a small-scale slaughterhouse in rural Ghana, Water Environment Research. 78 (2006) 2335-2339.

DOI: 10.2175/106143006x111925

[6] H. Naegele, J. Lindner, W. Merkle, A. Lemmer, T. Jungbluth, C. Bogenrieder, Effects of temperature, pH and O2 on the removal of hydrogen sulfide from biogas by external biological desulfurization in a full scale fixed-bed trickling bioreactor (FBTB), Int. J. Agric & Biol Eng. 6 (2013).

[7] T. Kobayashi, Y. Li, K Kubota, H. Harada, T. Maeda, H. Yu, Characterization of sulfide-oxidizing microbial mats developed inside a full-scale anaerobic digester employing biological desulfurization, Appl Microbiol Biotechnol. 93 (2012) 847-857.

DOI: 10.1007/s00253-011-3445-6

[8] E. A. Tsavkelova, A. I. Netrusov, Biogas production from cellulose-containing substrates: A review, Applied Biochemistry and Microbiology. 48 (2012) 421-433.

DOI: 10.1134/s0003683812050134

[9] A. K. Dubey, Water scrubbing for carbon dioxide removal from biogas, Annual report of Central Institute of Agricultural Engineering, Bhopal, India, (2000).

[10] K. V. Vijay, R. Chandra, P. M. V. Subbarao, S. S. Kapid, Biogas purification and Bottling into CNG Cylinders: Producing Bio-CNG from Biomass for Rural Automotive Applications, A paper presentation at The 2nd Joint International Conference on Sustainable Energy and Environmetnt (SEE), Bangkok, Thailand, (2006).

[11] J. C. H. Shih, From biogas energy, biotechnolgy to new agriculture, World's Poultry Science Journal. 68 (2012) 409-416.

[12] C. Robert, J. M. Reid, B. E. Prausnitz, The Properties Of Gases and Liquids, fourth ed., McGraw-Hill, Boston, (1987).

[13] K.L. Kovacs, et. al., Improvement of biogas production by bioaugmentation, BioMed Research International. 2013 (2012) 1 – 7.