Treatment method of river polluted bed mud

Abstract

The invention discloses a treatment method of river polluted bed mud, comprising: adding oxidant into a polluted river to ensure that the bed mud on the surface layer is in the oxidation state; and preferably, adding water-solubility calcium salt and ferric salt. The invention ensures that the whole self-cleaning process of the river is in the aerobic state all the time by improving the oxidation reduction property of the polluted bed mud, thus creating conditions for aerobic microorganisms, amplifying bed mud aerobic microorganisms, and leading the aerobic microorganisms to digest organic pollutants; and in addition, the organic pollutants are completely oxidized and degraded into complete oxides such as CO2, H2O, NO2, SO4<-2> and the like, blackening and odor-causing substances, such as H2S, methyl mercaptan, FeS and the like produced during the anaerobic degradation of organic matters can be quickly oxidized, and the black and odor degree of water body can be effectively improved and remitted. Meanwhile, the calcium salt, the ferric salt and phosphorus-deposited nutritive salt are simultaneously added to lower river pollution degree and eutrophy level. The method of the invention has simple operation and strong selective pertinence, can treat in situ, almost does not damage the ecological balance of the original river and has favorable treatment effect.

Description

technical field [0001] The invention relates to a treatment method for river polluted bottom mud, in particular to a treatment method for polluted rivers with organic pollutants as main pollutants. Background technique [0002] With the rapid development of industrial production and cities, a large amount of industrial wastewater and domestic sewage are discharged into rivers, resulting in the deterioration of river water quality and increasingly serious river sediment pollution, and the river bed is generally raised. Taking Guangzhou as an example, according to the data in 2002, the rivers in Guangzhou are mainly polluted by organic pollutants such as petroleum and polycyclic aromatic hydrocarbons, which often make the rivers in an anaerobic state and produce many toxic and harmful substances, including volatile sulfides and methane. [0003] The treatment of polluted rivers is a difficult point in pollution control in the world. Since the 1950s, developed countries such a...

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Problems solved by technology

There are several problems in dredging: first, the cost is high;

The study also found that improper dredging of the bottom sediment may cause the loss of the original ecological functions of the water body, which are relatively environmentally friendly, such as

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