Deep purification pond chain treatment process for dredging tail water

Abstract

The invention belongs to the technical field of water treatment, and relates to a deep purification pond chain treatment process for dredging tail water. The process adopts a first-stage sedimentationpond, a second-stage sedimentation pond, a muddy water pond, a clear water pond and an ecological landscape pond. The ponds of the process are connected in an overflow weir mode. When the distance between ponds is large, the ponds are connected through pipelines, pipeline silting prevention measures are adopted, when the concentration of suspended particles in tail water is smaller than or equalto 200 mg / L, the second-stage sedimentation pond is not arranged, effluent of the first-stage sedimentation pond directly enters the muddy water pond, and aquatic plants are planted in the ecologicallandscape pond. The provided process has the advantages that no power facility is needed; the process is energy-saving and environmentally-friendly; organic matters, N, P and other pollutants in waterare adsorbed and degraded step by step through the combined action of matrixes, plants, and microorganisms in the ponds, an ecological landscape is created, and tail water is deeply purified.

Description

technical field [0001] The invention belongs to the technical field of water treatment, in particular to a deep purification pond chain treatment process for dredged tail water. Background technique [0002] Existing techniques and drawbacks: [0003] Dredging and dredging is an important means for environmental protection projects to control the endogenous pollution of river, lake and reservoir bottom sediment, and it is also the main measure for developing and maintaining waterways. However, dredging and dredging, especially the wet dredging method, will generate a large amount of dredging tail water, and the pollutants in the sediment will diffuse into the water body after stirring, so the tail water must be treated before it can be discharged. Dredged tail water has the characteristics of large water volume and unstable water quality. Compared with surface water, dredged tail water generally has a higher concentration of suspended particulate matter, while other water q...

AI Technical Summary

Problems solved by technology

At present, the tail water treatment of dredging projects mainly adopts the process of dosing coagulation sedimentation and porous material adsorption for treatment, but the subsequent use of tail water effluent is limited due to dosing coagulation sedimentation; porous material adsorption method consumes a lot of adsorption materials and costs Therefore, the environmental protection treatment of dredging and dredging tail water is an important research direction for dredging and dredging projects and the control of internal source pollution of rivers, lakes and reservoirs

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