土著微生物强化造粒原位修复城市黑臭河道底泥技术

In Situ Remediation Technology of Urban Black-smelly River Sediment by Intensive Granulation of Indigenous Microorganisms

随着社会经济的发展和城市化进程的加快,大量生活污水、工业废水排入城市的河流、湖泊,导致水体严重污染,形成黑臭水体。当废水和污染物进入河道水体之后,会产生两个相互关联的过程,即水体中污染扩散的过程和水体自净过程,在这两个过程中河道底泥都扮演了重要的角色。当河道水体的污染在自身的净化能力范围之内时,水体中的污染物会汇集至底泥中,即底泥的吸附效应;当河道水体污染超出自身净化能力范围时,底泥中的分解营养盐释放,在河道中不断向上层水体释放营养盐和有机物,会加重河道水体的污染,即底泥的释放效应。

With the development of social economy and the acceleration of urbanization, a large number of domestic sewage and industrial wastewater are discharged into rivers and lakes in cities, which leads to serious pollution of water bodies and forms black and smelly water bodies. When the waste water and pollutants enter the river water body, there will be two interrelated processes, that is, the process of pollution diffusion in the water body and the process of water body self-purification, in which the river sediment plays an important role. When the river body is within its own purification capacity, the pollutants in the water will be collected into the sediment, that is, the adsorption effect of the sediment. When the pollution of the river water body exceeds the range of its own purification ability, the decomposed nutrient salt in the sediment will be released, and the nutrient salt and organic matter will be released to the upper water body continuously in the river channel, which will aggravate the pollution of the river water body, that is, the release effect of the sediment.