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J Environ Manage

Title:		Biogasification of biowaste and sewage sludge--measurement of biogas quality
Author(s):		Kymalainen M; Lahde K; Arnold M; Kurola JM; Romantschuk M; Kautola H;
Address:		"HAMK University of Applied Sciences, P.O. Box 230, 13101 Hameenlinna, Finland. maritta.kymalainen@hamk.fi"
Journal Title:		J Environ Manage
Year:		2012
Volume:		20110205
Issue:
Page Number:		S122 - S127
DOI:		10.1016/j.jenvman.2011.01.003
ISSN/ISBN:		1095-8630 (Electronic) 0301-4797 (Linking)
Abstract:		"Biogas quality, the presence of some trace components (siloxanes, sulfur compounds, volatile organic compounds, VOCs) in biogas, is in a decisive role when determining the biogas utilization and the purification requirements and equipments. In the present work, the effects of process changes related to reactor loading variations on the concentrations of selected trace compounds in biogas were studied. Source separated biowaste and sewage sludge were co-digested in a mesophilic pilot reactor (200 L) for four months during which the organic load was stepwise increased. The results showed that the process worked steadily up to the load of 8 kgVS m(-3)d(-1). Also the community composition of methanogenic archae stayed largely unaffected by the load increase, and was at all stages typical for a mesophilic biogasification process. Gaseous concentrations of siloxanes, hydrogen sulfide and most VOCs remained at a constant low level, showing no sensitivity to variations in the load and related process changes. However, the total siloxane concentration in the biogas was dependent on feed quality, and the detected concentrations require removal prior to use in turbines or fuel cells. Otherwise, after the removal of siloxanes, the biogas studied in this work is well applicable in various electricity production options, like in gas engines, turbines, microturbines and fuel cells"
Keywords:		"Archaea *Biofuels Electricity Hydrogen Sulfide/analysis Methanosarcina *Sewage/microbiology Siloxanes/analysis Sulfur Compounds/analysis Volatile Organic Compounds/analysis Waste Disposal, Fluid/methods;"
Notes:		"MedlineKymalainen, M Lahde, K Arnold, M Kurola, J M Romantschuk, M Kautola, H eng Research Support, Non-U.S. Gov't England 2011/02/08 J Environ Manage. 2012 Mar; 95 Suppl:S122-7. doi: 10.1016/j.jenvman.2011.01.003. Epub 2011 Feb 5"