Department of Environmental Sciences, Informatics and Statistics, University Ca' Foscari of Venice, Via Cesare Pavese 18, 31100 Treviso, Italy.
Bioresour Technol. 2013 Jan;128:612-8. doi: 10.1016/j.biortech.2012.11.002. Epub 2012 Nov 10.
In this study the optimization of the biogas yield from anaerobic co-digestion of manures and energy crops was carried out using four pilot scale CSTRs under different operating conditions. The effect on biogas yield of the partial substitution of energy crops with agro-waste was also investigated. For each substrate used during the continuous trials, BMP batch assays were also carried out to verify the maximum methane yield theoretically obtainable. Continuous operation results indicated that the co-digestion of manures, energy crops and agro-waste was viable at all operating conditions tested, with the greatest specific gas production of 0.54 m(3)/kg VS(fed) at an organic load rate of 2 kg TVS/m(3)(r)d consisting of 50% manure, 25% energy crops and 25% agro-waste on VS basis. No significant differences were observed between high and low loaded reactors suggesting the possibility of either improving the OLR in existing anaerobic reactors or reducing the design volumes of new reactors.
本研究采用四个中试规模的 CSTR 在不同运行条件下，对粪便和能源作物的厌氧共消化产沼气进行了优化。还研究了用农业废物部分替代能源作物对沼气产量的影响。对于连续试验中使用的每种底物，还进行了 BMP 批量试验，以验证理论上可获得的最大甲烷产量。连续运行结果表明，在所有测试的运行条件下，粪便、能源作物和农业废物的共消化都是可行的，在有机负荷率为 2 kg TVS/m(3)(r)d 的情况下，最大比产气率为 0.54 m(3)/kg VS(进料)，其中以 VS 为基础，含有 50%的粪便、25%的能源作物和 25%的农业废物。高负荷和低负荷反应器之间没有观察到显著差异，这表明有可能提高现有厌氧反应器的有机负荷率，或降低新反应器的设计体积。
