生活污水的厌氧处理实验研究

Study on Anaerobic Treatment of Municipal Sewage

生活污水的污染面相当广,如直接排入水体不能得到很好的净化,必定加重水体的受污染程度。生活污水作为一种低浓度综合污水,其处理方法相当多。好氧法处理生活污水效果较好,技术成熟,已经得到了广泛的应用,但运行费用较高。利用厌氧UASB对生活污水的厌氧处理进行研究,实验结果表明,用UASB处理生活污水是可行的,在常温下运行,使厌氧水力停留时间在8小时,处理效率达到80%,并可较大地降低生活污水的吨水投资及直接运行费用。厌氧菌能够在一定条件下长时间保存,再启动时只需较合适的环境,在短时间内即可恢复活性。

Pollution of municipal sewage spreads in extensive range. If sewage isn＇t treated well to discharge water body, it certainly aggravates water quality of water body. Municipal sewage is low concentration of comprehensive sewage, and its treat- ment method is quite a few. Aerobic treatment of municipal sewage has better removal efficiency. As a mature technology, the method is widely used in municipal sewage. However, the method has higher operation costs. The paper introduces anaerobic pilot plant test of municipal sewage in UASB reactor. The results indicate that the removal efficiency reaches 80% when hydraulic retention time amounts to 8 hours, Anaerobic method could obviously reduce investment and operation costs per tons of sewage. Anaerobic bacterium could be preserved for a long time under certain condition. The bacterium will reactive in a short time under appropriate circumstance when startup.