基于OUR的垃圾渗滤液对城市污水厂活性污泥的抑制特征检测

Detection of Inhibition Characteristics of Activated Sludge in Urban Sewage Treatment Plants by Landfill Leachate Based on Oxygen Uptake Rate (OUR)

垃圾渗滤液污染物成分复杂,存在对活性污泥生理活动抑制的物质。在垃圾渗滤液量较少,需要与城市生活污水合并处理时,需要考虑垃圾渗滤液对城市生活污水厂活性污泥的抑制特征,以及活性污泥对垃圾渗滤液的适应情况。本文针对某垃圾渗滤液出水,应用测定活性污泥氧吸收速率(OUR)的方法,来表征活性污泥被垃圾渗滤液抑制和适应情况。实验结果表明垃圾渗滤液会对活性污泥正常的生理活动产生抑制,在活性污泥OUR测定反应器(2.0 L)中,投加200 ml垃圾渗滤液后,活性污泥的OUR值从40~45 mg O2/(L∙h)下降到25 mg O2/(L∙h)左右,减少约50%;另外活性污泥对此垃圾渗滤具有一定的适应性,在运行一段时间后可以适应垃圾渗滤液抑制作用;本文为指导垃圾渗滤液处理方式的选择,合理、经济、有效地处理垃圾渗滤液提供了一种评价手段。Landfill leachate has complex pollutant components, and there are substances that inhibit the physiological activities of activated sludge. When the amount of landfill leachate is small and needs to be treated in combination with activated sludge, it is necessary to consider the inhibition characteristics of landfill leachate on activated sludge and the adaptation of activated sludge to landfill leachate. In this paper, for a certain landfill leachate effluent, the oxygen uptake rate (OUR) method was used to characterize the inhibition and adaptation of activated sludge to landfill leachate. The experimental results show that landfill leachate can inhibit normal physiological activities, and the OUR value of activated sludge decreased from 40~45 mg O2/(L∙h) to 25 mg O2/(L∙h) after adding landfill leachate of 200 ml into the 2.0 L OUR measurement device, reducing by about 50%;activated sludge has a certain adaptability to this landfill percolation, and can adapt to the inhibition of landfill leachate after a period of operation;this paper is to guide the selection of landfill leachate treatment methods, which are reasonable, economical, and Effective treatment of landfill leachate provides an evaluation tool.