Method for in situ repairing eutrophication surface water

Abstract

The invention discloses a method for in-situ restoration of eutrophic surface water, which comprises the following steps: 1) plant pre-cultivation: after washing the yellow-flowered water dragon collected from the field, the Hoagland plant of the international hydroponic standard is used in the greenhouse. 9~11 days of domestication and cultivation of nutrient solution; 2) Sewage treatment: Transplant the yellow flower water dragon after the above-mentioned domestication and cultivation to the surface of the treated waters, and utilize its stolons and roots to absorb excess nitrogen and phosphorus nutrients in the water; Place the described yellow flower water dragon whose fresh weight is 5~20kg. By adopting the method of the invention, the biological in-situ restoration of the eutrophic surface water can be realized.

Description

technical field

[0001] The invention relates to a method for treating eutrophic surface water. Background technique

[0002] With the rapid development of the city, the corresponding sewage treatment technology has not adapted to it; resulting in serious pollution of the urban water environment and deteriorating water quality. The sewage discharge standard of urban sewage treatment plant GB18918-2002 total nitrogen discharge standard A and B standards are 15 and 20 mg / L, and the total phosphorus A and B standards are 1.0 and 1.5 mg / L, far exceeding GB3838-2002 V water Standards for total nitrogen 2.0mg / L, total phosphorus 0.4mg / L for rivers, and 0.2mg / L for lakes and reservoirs. The existing secondary treatment of sewage does little to remove N and P, and the treated tail water discharge, rainwater runoff, sediment, etc. will become the main cause of polluting the water environment. The input of N, P and other nutrient elements and the dissolved oxygen status have a great ...

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