Tidal river ecological purification island and backflushing sludge discharge method thereof

Abstract

The ecological purification island comprises a clear water section, a rectification section, an ecological purification section and a water outlet section which are sequentially communicated in the length direction of the ecological purification island, and the clear water section comprises a one-way flow inlet, a sand settling area and a settling area, and the sand settling area and the settling area are sequentially arranged from bottom to top; the rectification section comprises water distribution holes; the ecological purification section comprises a water inlet distribution wall, a water inlet end filler protection layer, a purification filler, a water outlet end filler protection layer and a water outlet lattice wall which are sequentially arranged in the length direction of the ecological purification island; the water outlet section comprises a one-way outlet; the invention further provides a backflushing and sludge discharging method of the ecological purification island. According to the invention, the problem of stably purifying a tidal river channel is solved, an unpowered sequencing batch operation mode during operation is formed, a small amount of water pump electricity is required to be provided only during sludge discharge and backflushing, and meanwhile, clean water stored in the clean water section can be used for realizing backflushing on the purification filler in the ecological purification section, so that the system is energy-saving and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of ecological purification islands, in particular to an ecological purification island of a tidal river course and a recoil mud discharge method thereof. Background technique [0002] At present, the water bodies of most rivers in the country, especially the water bodies of rivers and lakes located in cities, have not yet reached the water function zoning target, and some water bodies are still in the state of black and odorous. Key goals of river management within a period of time. Due to the ebb and flow of tides, the water level of tidal rivers is constantly changing, and the water level changes greatly. For example, the annual average high tide level of Huangpu Park Station on the main stream of the Huangpu River is 3.14m, the annual average low tide level is 1.29m, and the historical highest tide level is 5.72m. The average high tide lasted 4 hours and 18 minutes, and the average low tide lasted 8 hour...

AI Technical Summary

Problems solved by technology

Although floating leaves or emergent plants can be planted on floating beds and floating islands, the planting area is small, and the removal of pollutants is limited, and the frame carriers of floating beds and floating islands are easily washed and damaged by water flow, and the purification effect is not stable; the ecological filter island adopts ecological stone It is made of stacked cages, which cannot intercept the sediment in the water body. The interception and removal effect on dead leaves and branches is better, but it is easy to be blocked by sediment deposition, and it is difficult to form biofilm, and the ecological filter island cannot treat biofilm and The sediment is washed, and the purification effect cannot be sustained

The biochemical side purification method is to lift the water body through the water pump to the purification facility next to the river, add coagulant and coagulant aid, carry out coagulation sedimentation and biological treatment, and discharge the treated water into the river. The method is simple. , high purification efficiency, and good water quality, but land acquisition is required, and the operating costs include electricity, labor, and pharmaceutical costs. Due to high land acquisition and operating costs, it is difficult to fully promote the use

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