在 UASB 反应器中颗粒污泥的培养与应用研究

七十年代以来,世界各国出现了一批高速废水厌氧处理工艺,其中上流式厌氧污泥床(简称UASB)反应器是应用最广泛的装置之一。由于在UASB反应器中污泥的沉降性能不仅影响反应器结构,而且直接决定了反应器能否高负荷、高效率地运行,因此近几年来国内外一些学者都开始对具有优良沉降性能和高活性的颗粒污泥进行研究,但在我国,目前几乎所有的生产性UASB装置内污泥都是絮状的,处理负荷和效率都较低,本文研究了在UASB反应器中污泥颗粒化的条件和培养技术,并在此基础上对有关颗粒污泥实用性等方面的问题也进行了一定的探讨。

Acclimatization and Application of the Granular Sludge in an Upflow-Anaerobic-Sludge-Blanket (UASB) Reactor

In this paper, the acclimating techniques, the nutritional conditions and the environmental factors about the First Start-up granular sludge in an Upflow Anaerobic Sludge Blanket reactor have been studied. The Secon-dary Start-up process has been discussed, too. The results show that the anaerobic sludge can be granulated within 65 days in the laboratory by controlling the sludge loading, when it is seeded with conventional digested sludge and cultivated in synthetic waste water. The granulation process will be shortened for 17 days if 6.2% matured granular sludge is added to the seed. In addition, it only takes 10 days for the granular sludge cultivated in synthetic wastewater to be adapted to treat industrial wastewater while increasing its concentration.