升流式厌氧污泥层反应器水力混合特性研究

对升流式氧污泥层反应器在常温下处理生活污水启动，培养颗粒污泥及运行的水力混合问题进行了系统研究，试验结果表明，当ＨＲＴ在４．２８－１１．７０ｈ时，死区容积只占反应器总容积的２．１％－６．７＾。反应器在实际运行中可忽略不良水力混合的影响，水力负荷和沼气容积产量共同影响水流流速在升流方向上的均匀性，它们在离散数Ｄ之间存在着如下关系；Ｄ＝０．００３３Ｌ＋０．０４５Ｇ＋０．０７３。

STUDY ON HYDRAULIC MIXING CHARAC-TERISTICS OF AN UPFLOW ANAEROBIC SLUDGE BLANKET REACTOR

In this paper,hydraulic mixing characteristics of an upflow anaerobic sludge blanket re-actor for treating domestic sewage at ambient temperature and the granulation of anaerobic sludge are strdied systematically;Experimental results demonstrate when HRT is 4.28-11.70 h, the dead zone of the reactor is about 2.1%-6.7%.The poor hydraulic mixing can be neglected.Both the hydraulic loading rate(L)and the biogas production volumetric rate(G)affect the homogenization in upflow velocity. The relationship among L,G and dispersion number D(non-dimension) is found to be:(D)=0.003L+0. 045G+0. 073.Dcan represent selection pressure quantitatively. The granular sludge is formed in this experi- ment as D approaches 0.088-0.095.