Abstract The hydrodynamic of modified up-flow anaerobic sludge blanket (UASB) treating organic fraction of municipal solids wastes (OFMSW) was investigated using tracer test experiments and residence time distribution (RTD) based models. The modified UASB digester employing the up-flow reactor concept was composed of the sludge bed, localized at the bottom of the reactor, a buffer zone above the sludge bed, a section with the OFMSW, and an upper section with a solid–liquid–gas separator. The solid-state section with the OFMSW allows the separation of hydrolytic and methanogenic phases, reducing the acidification of the reactor. The hydraulic flow transports the faster biodegradable fraction from the packing section to the sludge bed, favoring the methane productivity. Residence time distribution curves were analyzed by three tracer test models (axial dispersion model ADM, tanks in series model TIS and a multiple parameter model MPM). The MPM was successfully fitted to the experimental data.

中文翻译：

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改进的上流式厌氧污泥床反应器处理城市固体废物有机部分的流体动力学

摘要 使用示踪剂测试实验和基于停留时间分布 (RTD) 的模型研究了改良上流式厌氧污泥床 (UASB) 处理城市固体废物有机部分 (OFMSW) 的流体动力学。采用上流式反应器概念的改进型 UASB 消化器由位于反应器底部的污泥床、污泥床上方的缓冲区、带有 OFMSW 的部分和带有固-液-液的上部组成。气体分离器。带有 OFMSW 的固态部分允许分离水解相和产甲烷相，从而减少反应器的酸化。水力流将更快的可生物降解部分从填料段输送到污泥床，有利于提高甲烷生产率。通过三个示踪剂测试模型（轴向扩散模型 ADM、串联罐模型 TIS 和多参数模型 MPM）分析停留时间分布曲线。MPM 成功地拟合了实验数据。