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Morphological study of the granules in UASB and hybrid reactors

机译：UASB和混合反应堆中颗粒的形态研究

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Morphology of the granules formed in anaerobic digestion of distillery wastewater was studied in two laboratory scale bioreactors i.e., upflow anaerobic sludge blanket reactor and hybrid reactor. The effects of two different inoculum sludges in early granulation and start-up were studied. Study revealed that earlier start-up and granulation of biomass could be achieved using mixed sludge (anaerobic digested sludge: cowdung and aerobic sludge) than anaerobically digested sludge. Scanning electron microscope (SEM) study of the granules showed predominance of Methanosarcina and Methanothrix type of species on the surface of granules. The change in the morphology and other physical parameters of the granules due to increase in organic loading rate were also studied. The size distribution of granules across the height of the sludge bed showed that the granules of larger diameter having higher settling velocity are mainly concentrated at the lower active zones while smaller sized granules having less settling velocity were found at the top and middle zones of the sludge bed.
机译：在两个实验室规模的生物反应器，即上流式厌氧污泥床反应器和混合反应器中，研究了酿酒厂废水厌氧消化过程中形成的颗粒的形态。研究了两种不同接种污泥在早期制粒和启动过程中的作用。研究表明，与厌氧消化污泥相比，混合污泥（厌氧消化污泥：牛粪和好氧污泥）可以更早地启动和造粒。颗粒的扫描电子显微镜（SEM）研究表明，在颗粒表面上主要存在甲烷菌和甲烷菌型物种。还研究了由于有机负载率增加而引起的颗粒形态和其他物理参数的变化。污泥床整个高度的颗粒尺寸分布表明，沉降速度较高的大直径颗粒主要集中在较低的活性区，而沉降速度较小的小尺寸颗粒则位于污泥的顶部和中间区域。床。

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