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首页> 外文期刊>American Journal of Chemical Engineering >Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste
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Modeling and Analysis of Biogas Generation Rate Sensitivity to Initial-pH, Leachate-Level and Ash-Loading during Anaerobic Biodegradation of Organic Solid Waste

机译：有机固体废弃物厌氧降解过程中沼气产生速率对初始pH，渗滤液水平和灰分负荷敏感性的建模与分析

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摘要

Anaerobic biodegradation of solid waste food-residues mixed with fruit-waste was carried out at mesophilic conditions. The goal was to model the sensitivity of biogas generation rate to initial-pH, leachate-level and ash-loading. Two process parameters were analyzed at centre-points while the third factor was set at low-, mid- and high-levels. The simulation results showed that at initial-pH of 5 (low-level), the biogas generation rate was more sensitive to ash-loading than at high-level of initial-pH values. The minimum and maximum attainable biogas generation rates due to perturbations in ash-loading were 0.79 and 1.89 mL/min, respectively, representing a difference of 1.10 mL/min. A comparison using sensitivity quotient revealed that decreasing leachate-level had a stronger effect on biogas generation rate than increasing it. It was also found that the biodegradation process was over four-times more sensitive to variations in initial-pH than in ash-loading while it was over seven-times more sensitive to variations in initial-pH than in leachate-level. It was concluded that the sensitivity of biogas generation rate was highest to variations in initial-pH and least to variations in leachate-level.
机译：在中温条件下，对固废食物残渣与水果废物混合进行厌氧生物降解。目的是对沼气产生速率对初始pH，渗滤液水平和灰分装载的敏感性进行建模。在中心点分析了两个过程参数，而将第三个因素设置为低，中和高水平。模拟结果表明，在初始pH值为5（低水平）时，沼气生成速率对灰分加载的敏感性比在初始pH值高水平时更为敏感。由于灰分负荷的扰动而导致的最小和最大可获得沼气产生速率分别为0.79和1.89 mL / min，相差1.10 mL / min。使用敏感度商进行的比较显示，降低渗滤液水平对提高沼气产生率的影响要大于增加渗滤液。还发现，生物降解过程对初始pH值变化的敏感性是灰分加载的四倍，而对初始pH值变化的敏感性是渗滤液水平的七倍。结论是，沼气产生速率对初始pH值变化的敏感性最高，而对渗滤液水平的变化的敏感性最低。

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