Sludge processing system for watercourses and lakes and processing method thereof

Abstract

The invention relates to an environmental-friendly system, in particular to a sludge processing system for watercourses and lakes. The sludge processing system comprises a control system, a sludge hoisting device, a sludge water preprocessing device and a sludge water magnetic separation drying device, wherein the sludge hoisting device, the sludge water preprocessing device and the sludge water magnetic separation drying device are sequentially connected, the sludge hoisting device comprises a hoisting pump and a sludge suction head part, the sludge water preprocessing device comprises a dosing system, a coarse screen, a sand removing device and a coagulating device which are sequentially connected through pipelines, and the sludge water magnetic separation drying device comprises a magnetic separation device and a squeezing device. According to the sludge processing system disclosed by the invention, the water content ratio of processed sludge is less than 75%, the sludge body is reduced by nine tenths, the water body color of a black, smelly and high watercourse is obviously changed, the COD (Chemical Oxygen Demand) and the BOD (Biological Oxygen Demand) for processing outlet water are reduced by 40-45 %, and the water quality is clear. The sludge processing system disclosed by the invention is suitable for processing sludge and sewage of city landscape watercourses, artificial lake water bodies and city buildings and protecting the reservoir water source.

Description

technical field [0001] The invention relates to an environmental protection system, in particular to a river channel and lake sludge treatment system and a treatment method thereof. Background technique [0002] The pollution of urban rivers and lakes is shocking. Some rivers have even become domestic sewage and domestic waste discharge ditches. [0003] In recent years (since 2007), the urban water management department has carried out interception and management of sewage along rivers and lakes (including centralized garbage removal), revetments have been greened, rivers have been dredged, and the image of urban civilization has been greatly improved. Improved, but fell short of the Clearwater City target. [0004] A lot of money (tens of billions) has been invested. Why hasn’t the river been cleared up? From in-depth analysis, we can see that the pollutants in river water include external source pollution and internal source pollution. External source pollution includes ...

AI Technical Summary

Problems solved by technology

The research found that the river mud is divided into three layers: the bottom mud layer (the original river bed), the silt layer (sand and dead mud), the floating mud layer (the main release layer of pollutants). After suction, it is transported to the storage yard by boat for sedimentation treatment. The excavator and grab bucket mainly clean up the solid waste (twigs, weeds, construction waste, stone sand, bottom mud), which is very effective in dredging the river channel and leveling the river bed. It contributes very little to the removal of the main pollution layer ----- river floating mud, and the disturbance is great, and the short-term water quality of the river deteriorates; the cutter suction can remove the river mud and floating mud, but the water content of the mud is extremely high, and the transportation cost is high. The area of ​​mud sedimentation stockpile is large, and the inland river in the city is narrow and has many bridges, so the cutter suction ship is more restricted

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