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Published online 3 April 2006
Published in J Environ Qual 35:830-836 (2006)
DOI: 10.2134/jeq2005.0239
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Methane Production during Storage of Anaerobically Digested Municipal Organic Waste

Trine Lund Hansena, Svend G. Sommerb, Søren Gabriela and Thomas H. Christensena,*

a Institute of Environment & Resources, Technical University of Denmark, Building 113, DK-2800 Lyngby, Denmark
b Danish Institute of Agricultural Sciences, Foulum, Blichers Allé, Postbox 50, DK-8830 Tjele, Denmark


Figure 1
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  		Fig. 1. Accumulated methane production over time (days) for anaerobically digested organic municipal waste and cellulose. The methane production was measured in batch tests (triplicates) at seven temperatures: 5, 10, 15, 22, 28, 35, and 55°C. Nm3, cubic meter at 0°C and 1 atmosphere pressure; VS, volatile solids in the organic waste.

 

Figure 2
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  		Fig. 2. Estimated correlation between temperature and methane production rate for anaerobically digested organic municipal waste based on laboratory batch tests. Nm3, cubic meter at 0°C and 1 atmosphere pressure; VS, volatile solids in the organic waste.

 

Figure 3
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  		Fig. 3. Linear estimation of methane production from stored anaerobically digested organic municipal waste (1 Mg VS) over time. The horizontal curve represents the maximal obtainable methane production from the waste. Nm3, cubic meter at 0°C and 1 atmosphere pressure; VS, volatile solids in the organic waste.

 

Figure 4
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  		Fig. 4. Temperature in storage tanks measured over 1 yr in Denmark. Figure 4a shows measured temperatures in storage tanks for anaerobically digested manure in separate storage tanks, while Fig. 4b shows measured temperatures in storage tanks for anaerobically digested manure directly connected to the biogas reactor.

 

Figure 5
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  		Fig. 5. Correlation between temperature measured in separate storage tanks for anaerobically digested manure and the Danish average monthly temperature.

 

Figure 6
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  		Fig. 6. Filling degree of separate storage tanks for anaerobically digested manure measured over 1 yr.

 




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