Department of Biological and Agricultural Engineering, University of California, Davis, CA 95616, USA.
Bioresour Technol. 2010 Aug;101(16):6374-80. doi: 10.1016/j.biortech.2010.03.075. Epub 2010 Apr 20.
This research was conducted to develop an integrated rotary drum reactor (RDR)-anaerobic-phased solids (APS) digester system for the treatment of municipal solid waste (MSW) to produce biogas energy and achieve waste reduction. A commercial RDR facility was used to provide a 3-d pretreatment and sufficient separation of the organics from MSW and then the organics were digested in a laboratory APS-digester system for biogas production. The organics generated from the RDR contained 50% total solids (TS) and 36% volatile solids (VS) on wet basis. The APS-digester was started at an organic loading rate (OLR) of 3.1 gVS L(-1) d(-1) and operated at three higher OLRs of 4.6, 7.7 and 9.2 gVS L(-1) d(-1). At the OLR of 9.2 gVS L(-1) d(-1) the system biogas production rate was 3.5 L L(-1) d(-1) and the biogas and methane yields were 0.38 and 0.19 L gVS(-1), respectively. Anaerobic digestion resulted in 38% TS reduction and 53% VS reduction in the organic solids. It was found that the total VFA concentration reached a peak value of 15,000 mg L(-1) as acetic acid in the first 3d of batch digestion and later decreased to about 500 mg L(-1). The APS-digester system remained stable at each OLRs for over 100d with the pH in the hydrolysis reactors in the range of 7.3-7.8 and the pH in the biogasification reactor in 7.9-8.1. The residual solids after the digestion had a high heating value of 14.7 kJ gTS(-1).
这项研究旨在开发一种集成式转鼓式反应器（RDR）-厌氧分相固体（APS）消化器系统，用于处理城市固体废物（MSW）以生产沼气能源并实现废物减量化。使用商业 RDR 设施对 MSW 进行 3d 预处理并充分分离有机物，然后将有机物在实验室 APS 消化器系统中进行消化以生产沼气。RDR 产生的有机物在湿基上含有 50%总固体（TS）和 36%挥发性固体（VS）。APS 消化器以 3.1 gVS L(-1) d(-1)的有机负荷率（OLR）启动，并在三个更高的 OLR 下运行，分别为 4.6、7.7 和 9.2 gVS L(-1) d(-1)。在 OLR 为 9.2 gVS L(-1) d(-1)时，系统沼气产率为 3.5 L L(-1) d(-1)，沼气和甲烷产率分别为 0.38 和 0.19 L gVS(-1)。厌氧消化导致有机固体的 TS 减少 38%，VS 减少 53%。研究发现，在批式消化的前 3d 内，总 VFA 浓度达到 15000mg L(-1)，以乙酸计，随后降至约 500mg L(-1)。在每个 OLR 下，APS 消化器系统在超过 100d 内保持稳定，水解反应器中的 pH 值在 7.3-7.8 之间，沼气化反应器中的 pH 值在 7.9-8.1 之间。消化后的剩余固体具有 14.7kJ gTS(-1)的高热值。
