Optimizing Combined Anaerobic Digestion Process of Organic Fraction of Municipal Solid Waste
Optimizing Combined Anaerobic Digestion Process of Organic Fraction of Municipal Solid Waste
复制标题
优化城市固体废物有机部分的组合厌氧消化工艺
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
C. Visvanathan
中科院分区：
文献类型：
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作者：
J. Juanga;P. Kuruparan;C. Visvanathan
厌氧消化被认为是一种有吸引力的垃圾填埋前的预处理，以减少显着的污染负荷的环境稳定方法。优化厌氧消化工艺，在较短的消化周期内最大限度地将有机废弃物转化为沼气。本文介绍了一种固态间歇式厌氧消化的组合工艺，该工艺包括强化的前置阶段（水解和酸化）和甲烷相。早期冲洗微曝气被发现，以优化的整体前阶段的性能与水解产率为129克C/千克TS和酸化产率为193克VFA/千克TS。当与60 mm颗粒尺寸相比时，30 mm的减小的基质颗粒尺寸显示出在短消化期的优化的生物气生产。此外，高温条件在消化过程中的重要性进一步提高了操作性。通过高温中试规模消化器获得320 L CH 4/kg VS的甲烷产率，并与实验室规模的400 L CH 4/kg VS的生化甲烷潜力测试（BMP）相比，对应于80%的工艺效率。尽管如此，显着的废物稳定与质量和体积减少74%和58%，分别获得与VS减少71%。本研究强调了优化前阶段冲洗与微曝气，减少基质粒径为30毫米，并在优化过程中的嗜热条件的重要性。
Anaerobic digestion was potentially viewed as attractive method for waste stabilization prior to landfills as pre-treatment to reduce significant pollution load to the environment. Optimizing anaerobic digestion process, aim to maximize organic waste conversion to biogas at short digestion period. This paper presents the combined process of anaerobic digestion in solid state batch system which involves enhanced pre-stage (hydrolysis and acidification) and methane phase. Early flushing with microaeration was found to optimize the overall pre-stage performance with hydrolysis yield of 129 g C/kg TS and acidification yield of 193 g VFA/kg TS. A reduced substrate particle size of 30 mm showed an optimized biogas production at short digestion period when compared to 60 mm particle size. Moreover, the importance of thermophilic condition in digestion process further enhanced the operation. A methane yield of 320 L CH4/kg VS was obtained by thermophilic pilot scale digester and compared with lab-scale biochemical methane potential test (BMP) of 400 L CH4/kg VS corresponds to a process efficiency of 80%. Nevertheless, significant waste stabilization with mass and volume reduction of 74% and 58% was obtained respectively, with VS reduction of 71%. This study highlights the importance of optimum pre-stage flushing with microaeration, reduced substrate particle size of 30 mm, and thermophilic condition in optimizing the process.