A method for treating black and odorous water in cities and towns

Abstract

The invention discloses an urban black and odorous water body treatment method. Firstly, black and odorous water is drained and then is filtered through a mechanical grille, output water of the mechanical grille is led to an ionization ion cluster treatment device for materialized strengthening treatment, then the sewage is led to a coagulative precipitation tank, a pH value is regulated to 7.0-8.0, then a coagulant is added for coagulating reaction, then the sewage is led to a rapid settling tank for sludge-water separation, landfill or incineration disposal is performed after sludge drying, then the output water of the rapid settling tank is led to an ion rod treatment system, materialized strengthening treatment is performed, the sewage is led to a microporous ozone aeration treatment tank for oxygen increase treatment, and output water of an ozone generator flows back to an urban river. The black and odorous water body is subjected to purification and oxygen increase by adopting an ionization ion cluster coagulation technology and a special-effect oxygen increase technology, a self-purifying function of the water body can be effectively recovered, the treatment speed is high, the efficiency is high, the cost is low, the occupied area of devices is small, no secondary pollution is caused, and flowing water supplementing is not needed.

Description

technical field [0001] The invention relates to a treatment method for black and odorous water bodies in cities and towns, and belongs to the technical field of treatment of polluted water bodies. Background technique [0002] Black and odorous water bodies in cities and towns refer to water bodies in urban rivers that are obviously discolored (usually black or blackish) due to pollution and emit disgusting odors. In the process of urbanization and industrialization in our country, due to the direct discharge of industrial, agricultural and domestic wastewater into rivers, large-scale pollution of urban water bodies, eutrophication of water bodies, and finally the formation of black and odorous water bodies. In recent decades, the scope of urban water pollution has continued to expand and the degree of pollution has continued to deepen. Water bodies in most urban river sections across the country have been polluted to varying degrees, and it has become an urban disease. [...

AI Technical Summary

Problems solved by technology

Interception of external sources: Taking pollution interception measures such as pollution source engineering treatment at the watershed scale to substantially reduce the pollution load entering the river is the primary measure to eliminate black and odor problems. Only the country's material and financial resources can be implemented, and other treatment technologies are still needed to prevent the formation of black and odorous water bodies; internal source control: remove sediment, garbage, biological residues and other solid pollutants in the water through measures such as dredging and salvage, and use Water conservancy projects realize the control of endogenous pollution. This method can speed up the treatment process of black and odorous water bodies, but the large amount of engineering investment cannot solve the problem of black and odorous water bodies in cities and towns for a long time. Therefore, it can only be used as an auxiliary method for the treatment of black and odorous water bodies; Ecology Restoration: Eliminate dissolved pollutants in water bodies through ecological restoration and biological purification measures, but this method is slow to take effect, especially for black and odorous water bodies in cities and towns with a lot of suspended solids, the treatment effect is extremely unsatisfactory, and the implementation requires a lot of effort Land space or water body space is mostly used for rural domestic sewage treatment and coastal wastewater treatment. However, the urban population is concentrated and land resources are limited, which is not conducive to the implementation of this method; hydrodynamic improvement: by adding clean water to urban black and odorous water bodies, increasing water quality Mobility, dilution of pollutants, this method is mostly only used as a temporary treatment measure, especially in cities where water resources are scarce, this method is difficult to implement; water quality purification: add iron salt and aluminum salt coagulant to black and odorous water bodies in cities and towns, Promote the precipitation of suspended solids. This method has quick results and high efficiency. However, a single chemical treatment method cannot completely purify and treat black and odorous water bodies, and a large amount of chemical substances need to be added during the treatment process, which is likely to cause secondary pollution and cannot fundamentally Purify black and odorous water

[0005] The types of pollutants in black and odorous water bodies in cities and towns are complex, but the current treatment methods are relatively single, the effect is poor, the treatment cost is high, the energy consumption is high, and there are still periodic and repeated problems in many places

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