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近年来,我国农村和乡镇面临的环境污染问题日益突出,村镇污水处理率较低的问题备受关注.目前村镇污水厂的进水有机物浓度较低,出水水质难以稳定达标.为此,详细阐述了村镇污水厂的低浓度生活污水现象,分析了低浓度生活污水现象的成因及其危害,并建议按照如下3种情况分别处理:1)采取系列措施预防低浓度生活污水现象的出现; 2)将现有传统活性污泥法工艺改造成MBBR工艺; 3)对于尚未建成污水处理厂的地区,建议考虑SBR、生物转盘、生物接触氧化、曝气生物滤池等工艺.“,”In recent years, the environmental pollution problems in villages and towns in China became more and more serious, and the problem of low wastewater treatment rate in villages and towns received much attention. However, wastewater treatment plants in many villages and towns had difficulty in achieving stable and standard effluent water quality because of the low influent concentration of organic matters. Therefore, in this paper, the phenomenon of low concentration wastewater in villages and towns was discussed in details, and the causes and harms of low concentration phenomenon were analyzed.Countermeausures were given according to the following three situations respectively: 1) taking series measures to prevent the phenomenon of low concentration wastewater; 2) upgrading the existing traditional activated sludge process to MBBR process;3) for areas where wastewater treatment plants have not yet been built, SBR, rotating biological contactor, biological contact oxidation tank, biological aerated filter, etc. should be considered in priority.