Forster-Carneiro T, Pérez M, Romero L I, Sales D
Departamento de Ingeniería Química, Tecnología de Alimentos y Tecnologías del Medio Ambiente, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Campus Puerto Real s/n, 11510-Puerto Real, Cádiz, Spain.
Bioresour Technol. 2007 Dec;98(17):3195-203. doi: 10.1016/j.biortech.2006.07.008. Epub 2006 Aug 21.
The effect of inoculum source on anaerobic thermophilic digestion of separately collected organic fraction of municipal solid wastes (SC_OFMSW) has been studied. Performance of laboratory scale reactors (V: 1.1 L) were evaluated using six different inoculums sources: (1) corn silage (CS); (2) restaurant waste digested mixed with rice hulls (RH_OFMSW); (3) cattle excrement (CATTLE); (4) swine excrement (SWINE); (5) digested sludge (SLUDGE); and (6) SWINE mixed with SLUDGE (1:1) (SWINE/SLUDGE). The SC_OFMSW was separately and collected from university restaurant. The selected conditions were: 25% of inoculum, 30% of total solid and 55 degrees C of temperature, optimum in the thermophilic range. The six inoculum sources showed an initial start-up phase in the range between 2 and 4 days and the initial methane generation began over 10 days operational process. Results indicated that SLUDGE is the best inoculum source for anaerobic thermophilic digestion of the treatment of organic fraction of municipal solid waste at dry conditions (30%TS). Over 60 days operating period, it was confirmed that SLUDGE reactor can achieve 44.0%COD removal efficiency and 43.0%VS removal. In stabilization phase, SLUDGE reactor showed higher volumetric biogas generated of 78.9 mL/day (or 35.6 mLCH(4)/day) reaching a methane yield of 0.53 LCH(4)/gVS. Also, SWINE/SLUDGE and SWINE were good inoculums at these experimental conditions.
研究了接种物来源对单独收集的城市固体废物有机组分（SC_OFMSW）厌氧嗜热消化的影响。使用六种不同的接种物来源评估了实验室规模反应器（体积：1.1升）的性能：（1）玉米青贮饲料（CS）；（2）与稻壳混合消化的餐饮垃圾（RH_OFMSW）；（3）牛粪（CATTLE）；（4）猪粪（SWINE）；（5）消化污泥（SLUDGE）；以及（6）猪粪与消化污泥按1:1混合（SWINE/SLUDGE）。SC_OFMSW是从大学餐厅单独收集的。选定的条件为：25%的接种物、30%的总固体和55摄氏度的温度，这是嗜热范围内的最佳条件。六种接种物来源在2至4天的范围内显示出初始启动阶段，并且在10天的运行过程中开始产生甲烷。结果表明，在干燥条件（30%TS）下，消化污泥是城市固体废物有机组分厌氧嗜热消化处理的最佳接种物来源。在超过60天的运行期内，证实消化污泥反应器能够实现44.0%的COD去除效率和43.0%的VS去除率。在稳定阶段，消化污泥反应器显示出更高的体积沼气产量，为78.9毫升/天（或35.6毫升CH₄/天），甲烷产量达到0.53升CH₄/克VS。此外，在这些实验条件下，SWINE/SLUDGE和SWINE也是良好的接种物。
