System for purifying micro-polluted water flowing to reservoirs (lakes) and repairing ecological wetlands

Abstract

The invention discloses a system for purifying micro-polluted water flowing to reservoirs (lakes) and repairing ecological wetlands. The system comprises a hydraulic-power automatic control overturning gate, an artificial wetland and multistage stepped artificial wetland revetments, wherein the hydraulic-power automatic control overturning gate is arranged in a riverway to intercept the riverway into an upper stream and a lower stream; the artificial wetland is arranged in the riverway on the upper stream of the hydraulic-power automatic control overturning gate; the multistage stepped artificial wetland revetments are arranged on two sides of the riverway on the upper stream of the hydraulic-power automatic control overturning gate; each multistage stepped artificial wetland revetments comprise sheet pile members formed by non-fine concrete plates and piles; the sheet pile members are arranged on the bank slope of the riverway from high to low line upon line; and fillers and grown plants are filled between the two adjacent sheet pile members. The invention provides a technology for purifying micro-polluted water flowing to reservoirs (lakes) and repairing ecological wetlands. Polluted water in riverways is repaired through utilizing the ecological embankment and ecological wetland method, so that the contents of COD, BOD, TP and TN are reduced greatly.

Description

technical field [0001] The invention belongs to the technical field of river water purification, and in particular relates to a technology applied to the water purification of slightly polluted rivers entering a reservoir (into a lake) and restoration of ecological wetlands for river slope protection. Background technique [0002] With the rapid development of modern economy, the problem of river pollution is becoming more and more serious due to the influence of human factors such as industrial and urban wastewater and farmland surface runoff. At present, the main environmental problem of my country's lakes is water eutrophication. The main pollutants causing water eutrophication are nutrients such as nitrogen and phosphorus, and the rivers entering the lake are the main sources of pollution. The rivers entering the lake are mostly slightly polluted rivers, and the removal of nitrogen, phosphorus and organic matter is one of the keys to control the eutrophication of the lak...

AI Technical Summary

Problems solved by technology

(3) The coverage of the river system is large, and the concentration of pollutants in the incoming water varies greatly

[0005] Disadvantages: (1) Cannot solve the pollution problem fundamentally, but only partially improve the water quality of the river; (2) Cause secondary pollution, and the cost is high;

[0007] Disadvantages: (1) easy to cause secondary pollution

[0011] Disadvantages: (1) The proportion of artificial wetland filler is relatively high, the technology is relatively complicated, and the cost is high, which is not suitable for large-scale water treatment; (2) The daily maintenance is more complicated; (3) It is more affected by the ambient temperature and seasonality; ( 4) Large area, small hydraulic load, high engineering technical requirements

[0014] Disadvantages: (1) At present, the application of ecological floating beds generally belongs to in-situ water body restoration, which needs to occupy a large water surface area, affecting river navigation and flood control; (2) The growth of aquatic plants is greatly affected by environmental factors such as light, temperature, and seasons. The purification effect of the ecological floating bed fluctuates greatly throughout the year

[0017] There are many methods of ecological slope protection technology commonly used at present, such as the use of geotechnical material composite planting base, barbed wire and gravel composite planting base, geotechnical material soil-fixing planting base, vegetation-type ecological concrete, cement ecological planting base and soil curing agent, etc. Slope protection on the river bank and slope has a good effect on stabilizing the bank slope structure, and has improved the bank slope landscape to a certain extent, but has a very limited effect on intercepting surface pollutants from entering the river, and the cost is too high, so construction on the spot And the amount of construction is also very large, and the promotion and use are limited

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