山西大同某煤矿污水处理设备工程案例分析

山西大同某煤矿污水处理设备工程案例分析：

工艺流程

　　生产废水---调节池---初沉池---玻璃污水处理设备 ---回用水池

该系统采用PLC控制，减少人为干预因素。设备故障率降到低，了生产设备的连续运行。

操作简单：该设备采用一体化控制系统，避免了异地作业的发生，操作简单方便。

本系统出水浊度<1NTU，悬浮物<30mg/l，色度<30倍。完全满足生产用水的要求，感官可与自来水相媲美。

比中国的能源结构中煤炭占70%。煤矿开采过程中排放大量的废水。如果不经处理直接排放，会对环境造成严重污染，同时造成大量的水资源浪费。

煤矿废水是复杂的，在同一矿山废水中含有铁、锰等重金属、硫、氟、氯等非金属和有机污染物和悬浮固体，有些矿山废水的酸性较弱，即使是同一矿山，不同性质的废水也不同，甚至极不相同。这给煤矿废水处理技术的选择带来了很大的困难。

煤矿污水处理的设计要比活性污泥法好。由于污水中有机物含量较低，微生物在运行过程中不能得到低的营养物质，不能形成活性污泥，不能正常运行。氧化沟废水处理工艺也存在同样的问题。回流活性污泥不能回流，使原有的氧化沟系统成为带状曝气平板沉淀池，不能达到所要求的处理目标。许多矿山采用了两段生物接触氧化工艺处理煤矿生活污水，效果非常好。该技术的特点是能适应矿区污水浓度低、变化大的特点。同时，投资、运行、维护也比活性污泥法简单，但对脱氮除磷效果不佳。废水生物处理新技术、新技术的研究、开发和应用取得了很大成就。许多新技术应运而生。这些新工艺的共同特点是：、稳定、节能、脱氮除磷等多功能。

Coal mine wastewater is complex, containing iron, manganese and other heavy metals, sulfur, fluorine, chlorine and other non metals and organic pollutants and suspended solids in the same mining wastewater, some weak acid mine wastewater, even the same mine wastewater with different properties are also different, even very different. This has brought great difficulties to the selection of the technology for the treatment of coal mine wastewater.

The design of the sewage treatment in coal mine is better than that of the activated sludge process. Because of the low organic matter content in the sewage, the microorganism can not get the lowest nutriment during operation, and can't form activated sludge, so it can't run normally. There are also the same problems in the treatment process of oxidation ditch wastewater. The reflux activated sludge can not be reflued and the original oxidation ditch system becomes a strip aerated flat sedimentation tank, which can not reach the required treatment target. Many mines have adopted two stages of biological contact oxidation process to treat coal mine domestic sewage, and the effect is very good. The characteristic of this technology is that it can adapt to the low concentration of sewage and big change in the mining area. At the same time, investment, operation and maintenance are also simpler than activated sludge process, but the effect of nitrogen and phosphorus removal is not good. Great achievements have been made in the research, development and application of new technology and new technology of wastewater biological treatment. Many new technologies have come into being. The common features of these new processes are: high efficiency, stability, energy saving, nitrogen and phosphorus removal and other functions.