• 关键词：升流式厌氧污泥层反应器  厌氧颗粒污泥  水力混合特性  离散数

• 基金项目：

• 周琪
• 同济大学环境工程学院,上海 200092

• 胡纪萃
• 清华大学环境工程系,北京 100084

• 顾夏声
• 清华大学环境工程系,北京 100084

• 摘要：对升流式厌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4.28-11.7h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(L)和沼气容积产量(G)共同影响水流流速在升流方向上的均匀性,它们与离散数D(无因次)之间存在着如下关系：D=0.0033L+0.045G+0.073.提出了用D定量地表示升流筛分强度,在本试验条件下,当D在0.088-0.095时,形成了颗粒污泥。

• Abstract：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.

• Key words：upflow anaerobic sludge blanket reactor  anaerobic granular sludge  hy-draulic mixing characteristics  dispersion number

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