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In the straw biogas fermentation with high concentration, ratio of nitrogen and amount of seeding material have significant effect. Experiments show that gas production is very high in early time when the urea addition level is 2.5% or 3.0%, but the methane content of gas is less than 45%. when the urea proportion is 3.5%, the gas production curve is gently, the fermentation starting time is short...
This paper explores the issue of sustainable energy from a multi-flux perspective, and has shown clearly that some of the choices being vigorously pursued today, such as bio-fuels, may have significant limits on scalability. While a Bio-Fueled World does not seem to be sustainable, an Inorganically Fueled World, seems to have the potential to be able to scale to meet global needs, without in any way...
Based on time-varying statistical data and emission factors, multiyear NMVOCs emission inventories from fossil fuel combustion, biofuel burning, and biomass open burning in China for 1980-2005 were presented by a bottom-up estimate. The contributions of fossil fuel, biofuel, and open burning are estimated as 35%, 50%, and 15%, respectively, in 2005. Spatial distribution of NMVOCs emission shows that...
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