城镇沟渠污水的原位生态净化试验研究

Study on In-situ Ecological Purification of Town Ditch Sewage

针对城镇河道沟渠污水横流、黑臭不堪的状况,设计了一种城镇沟渠污水原位生态净化装置,它主要由厌氧系统、人工湿地、增氧过滤净化系统和太阳能集热系统组成。在清苑县某镇沟渠的支渠段构建了该原位生态净化系统,考察了对水质的改善效果。结果表明,该工艺可以有效利用城镇沟渠空间对污水进行原位生态净化,出水COD、NH3-N、SS分别为(16～37)、(2.2～8)、(1.2～3.5)mg/L,达到了中水回用标准,这可以有效恢复城镇河道沟渠的生态功能。该工艺的太阳能集热系统可对太阳能进行采集和蓄存,保证了系统在环境温度较低时仍能正常高效运行。

Aimed at the flooding and serious odor of town ditch sewage, an in-situ ecological purification process was designed. It is composed of anaerobic system, constructed wetland system, aerobic filtration and purification system and solar collector system. An in-situ ecological purification system was set at Qingyuan County in Hebei Province to investigate the improvement efficiency of sewage quality. The results show that the process can effectively use ditch space to perform in-situ ecological sewage puri- fication. The effluent COD, ammonia and SS are 16 to 37 mg/L, 2.2 to 8 mg/L and 1.2 to 3.5 mg/L respectively, reaching the reclaimed water reuse standard. The ecological functions of town ditches are effectively recovered. Utilizing the solar energy, the sewage treatment system can properly operate in low temperature environment.