Department of Environmental Technologies, Faculty of Marine and Environmental Sciences (CASEM), University of Cádiz, Pol. Río San Pedro s/n, 11510 Puerto Real Cádiz, Spain.
Department of Chemical Engineering and Food Technology, Faculty of Sciences, University of Cádiz, Pol. Río San Pedro s/n, 11510 Puerto Real Cádiz, Spain.
Bioresour Technol. 2013 Oct;146:109-117. doi: 10.1016/j.biortech.2013.07.055. Epub 2013 Jul 20.
Different high feed organic loading rates (OLRs) (from 5.7 g to 46.0 g TVS/l/d) or hydraulic retention times (HRTs) (from 15 d to 2 d) in single-phase dry-thermophilic anaerobic digestion (AD) of organic fraction municipal solid waste (OFMSW) were investigated. The specific gas production (SGP) values (0.25-0.53 m(3)/kg TVS) and the percentages of Eubacteria, Archaea, H2-utilising methanogens (HUMs) and acetate-utilising methanogens (AUMs) were stable within the ranges 80.2-91.1%, 12.4-18.5%, 4.4-9.8% and 5.5-10.9%, respectively. A HUM/AUM ratio greater than 0.7 seems to be necessary to maintain very low partial pressures of H2 required for dry AD process. Increasing OLR resulted in an increase in all the populations, except for propionate-utilising acetogens (PUAs). Optimal conditions were obtained at 3d HRT (OLR=30.7 g TVS/l/d), which is lower than the doubling time of acetogens and methanogens. The methane production (MP) was clearly higher than those reported in AD of OFMSW.
研究了单相干热厌氧消化（AD）中不同的高进料有机负荷率（OLR）（5.7-46.0 g TVS/l/d）或水力停留时间（HRT）（15-2 d）对有机部分城市固体废物（OFMSW）的影响。特定产气量（SGP）值（0.25-0.53 m3/kg TVS）和细菌、古菌、利用 H2 的产甲烷菌（HUM）和利用乙酸的产甲烷菌（AUM）的百分比分别在 80.2-91.1%、12.4-18.5%、4.4-9.8%和 5.5-10.9%的范围内稳定。似乎需要 HUM/AUM 比大于 0.7，以维持干 AD 工艺所需的非常低的 H2 分压。增加 OLR 会导致所有种群增加，除了利用丙酸的产乙酸菌（PUAs）。在 3d HRT（OLR=30.7 g TVS/l/d）时，可获得最佳条件，这低于产乙酸菌和产甲烷菌的倍增时间。甲烷产量（MP）明显高于 OFMSW 中 AD 的报道。
