期刊
WATER SCIENCE AND TECHNOLOGY
卷 53, 期 8, 页码 23-32出版社
I W A PUBLISHING
DOI: 10.2166/wst.2006.232
关键词
dry process; energy; grey waste; mechanically selected municipal organic solid waste; mesophilic; source sorted municipal organic solid waste
This paper presents a comparison of dry anaerobic digestion reactors fed with differently sorted municipal organic solid wastes. One reactor was fed with source sorted organic wastes and a second reactor was fed with mixed organic wastes consisting of grey wastes, mechanically selected municipal solid wastes and sludge. The two reactors utilised the same process (Valorga) and operational conditions at full scale. The results of the study emphasise the influence of the kind of treated material on the process performances, especially in terms of biogas and methane production, thus, energy reclamation. The reactor treating the source sorted organic waste and the reactor treating the mixed organic wastes generated some 200 m(3) and 60 m(3) of biogas per ton of waste treated, respectively, while the specific methane production was some 0.40 and 0.13 m(3) CH4/kgTVS, respectively. The mass balance and the final fate of the digested material from the two reactors were also clearly different. As for the costs, these were some 29euro per ton of treated waste (50% for personnel) and 53 euro/ton for disposing of the rejected materials. Incomes were some 100 euro/ton (on average) and an other 15 euro/ton came from green certificates. The initial investment was 16 million Euros.
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