River channel purification structure for reducing pollutant quantity and construction method thereof

Abstract

The invention discloses a river channel purification structure for reducing pollutant quantity. The river channel purification structure comprises a river channel, the river channel is alternately arranged into pebble shoal areas, sinking type planting areas and purification devices along the water flow direction, pebbles are laid in the riverbed of the pebble shoal areas to form a pebble layer, and the pebble layer is used for slowing down the water flow speed and acting as a biological film substrate, the riverbed of the sunken planting areas is lower than the riverbed of the pebble shoal areas, submerged plants with a water purifying function are planted on the riverbed of the sunken type planting areas, the purification devices are arranged at the junctions of the sunken type plantingareas and the pebble shoal areas, and a biological ceramsite infiltration layer, an activated zeolite filler layer and a gravel layer are arranged in the purification device. The river channel purification structure has the advantages that the river channel water body purification effect is good, the submerged plant growth amount is ensured in a drought period, the damage of high-speed water flowto the submerged plants can be effectively avoided in the flood season, the removal rate of CODCr is higher than 50%, the removal rate of B2O3 is higher than 40%, the SS removal rate is higher than 70%, the TN removal rate is higher than 30%, and the TP removal rate is higher than 30% when the river channel purification structure is used for river channel purification.

Description

technical field [0001] The invention relates to the technical field of river water treatment and purification, in particular to a river purification structure for reducing pollutants and a construction method thereof. Background technique [0002] As important carriers of natural resources and the environment, rivers and lakes have economic functions such as flood control and drainage, irrigation of farmland, water supply, shipping and breeding, provide biological habitats to reflect biodiversity, regulate climate, improve the environment, conserve water sources and shape landscapes, etc. The ecological function of the city has important practical and future significance for the rise and fall of the city, economic development and prosperity. [0003] Although the protection of the water environment has long been the consensus of the people, due to the limitations of various subjective and objective conditions, a large number of industrial and urban domestic tail waters are d...

AI Technical Summary

Problems solved by technology

However, pollution interception and treatment can only solve external pollution, while internal pollution still exists, and the ecological functions of rivers still cannot be restored.

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