Riverbed type percolation filtration water quality purification technique for renovation of municipal pollution river water

Abstract

The invention discloses a river bed infiltration water purification technology used for repairing the water body of polluted city rivers, which follows that below the river beds of city rivers, the purification structure of a filler infiltration bed (3) is built, by utilizing water head (the height of water formed by artificial construction rubber dam or the natural height of water of river channels), polluted river water is transported to a water distribution system (2) by adopting a floating type water getting device (1), the river water to be treated is evenly distributed to the whole purification unit of the filler infiltration bed (3) by the water distribution system (2), and the river water after a purification treatment is discharged into the lower reaches of river channels by a water collecting system (4). The purification technology of the invention realizes an effective purification treatment on the river water simultaneously without occupying limited land resources at the two sides of the river channels, thus not changing the shape of the river channels, not influencing the flow of the river water, nor having any negative impact on the landscape effect of the two banks of the river channels.

Description

technical field [0001] The invention belongs to the field of water environment pollution control engineering, and relates to a river bed type percolation water quality purification technology used for water restoration of urban polluted rivers. Background technique [0002] In recent decades, with the continuous increase of urban population and the shortage of land area, as well as people's unreasonable transformation and improvement of urban rivers (such as cutting bends and straightening, channelizing, hardening, etc.), the form of river banks and the flow of rivers have become monotonous. , The ecological system has been severely damaged, and the self-purification ability of the river has been greatly weakened. In addition, due to the lag in the construction of urban sewage collection and treatment systems, a large amount of domestic sewage, industrial wastewater, and rainwater are directly discharged into urban rivers, causing river pollution. At present, most urban riv...

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Problems solved by technology

[0004] At present, the main characteristics of my country's urban rivers are: the river channel is hardened and rehabilitated, the channel form is single, there is no river beach, the available land around the river bank is in short supply, there is no riverside aquatic plant belt, the ecosystem is severely damaged, very fragile, and the self-purification ability is poor

A variety of biological / ecological restoration technologies for ordinary river pollution introduced above are often not used in the treatment of urban rivers, or the efficiency is too low

For example, due to limited urban land resources, there is often no large area of ​​land available for use near urban rivers, so it is not suitable to adopt water purification technologies that require a large area such as artificial wetlands and inter-gravel contact oxidation technology

Aquatic plants can absorb part of nitrogen, phosphorus and other pollutants, but their effect is relatively weak. The main function is to restore the landscape effect of the river and assist in the establishment of the ecosystem of the river.

In addition, since the hardened river courses are all constructed with concrete, mortar block stones and other materials, completely removing the hardened river courses, rebuilding multi-natural river courses and building ecological revetments will have problems such as huge engineering volume, difficult construction, and high reconstruction costs. difficult to achieve in our country

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