Pollution control method of eutrophic water body

Abstract

The invention discloses a pollution control method of eutrophic water body. The pollution control method comprises the following steps: setting a surface runoff ecological intercept purification engineering and a pre-tank purification engineering on a ravine stream, wherein the surface runoff ecological intercept purification engineering comprises the step of carrying out deeply digging treatment on a source segment of the ravine stream and paving a filter material; reinforcing a water and soil loss segment of ravine stream side slope craggedness position and carrying out revetment on a ravine stream side slope loess exposed segment; newly building a cutting filter ditch in a ravine stream tail segment; the pre-tank purification engineering comprises respectively setting pre-tanks on a main stream and a branch stream; setting settling areas in water inlets of the pre-tank; setting multilevel circuitous type snakelike extended galleries in the pre-tanks and setting artificial biological media areas in the galleries; and planting aquatic plants in the pre-tanks. The pollution control method of the eutrophic water body is used for controlling source pollution of ravine stream water body going into a lake to form a denitrification reaction condition beneficial to alternation of nitration and denitrification, chemical agents are not needed, secondary pollution does not exist, and problems can be solved fundamentally.

Description

technical field [0001] The invention belongs to the field of pollution treatment, in particular to a pollution control method for eutrophic water body. Background technique [0002] Eutrophication of water body refers to that under the influence of human activities, a large amount of nutrients such as nitrogen and phosphorus required by organisms enter slow-flowing water bodies such as lakes, estuaries, and bays, causing algae and other plankton to multiply rapidly, and the dissolved oxygen in water bodies decreases. Deterioration of water quality, massive death of fish and other organisms. Since the eutrophication of water bodies is caused by the nutrients discharged by human activities, the water bodies in the suburbs of cities, as the receiving water bodies of human activities, are more prone to eutrophication and the degree is particularly serious. At present, water eutrophication has become one of the major environmental problems attracting global attention. [0003] ...

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Problems solved by technology

[0005] The control method of prior art can all play certain effect to the control of water body eutrophication, also has some problems simultaneously, (1) chemical treatment method, it needs to use a large amount of chemicals, and cost is higher, easily produces secondary pollution , and it is terminal treatment, which cannot solve the root of the problem; (2) physical treatment methods, artificial dredging, sewage interception and other methods have the characteristics of stages, and will change with changes in policies; (3) biological treatment methods, due to microbial The length of time required for cultivation is not easy to grasp, and the maintenance of microbial activity is also uncertain, so this method is not sustainable

[0006] To sum up, in the current existing technology, there is no particularly good prevention and control method for the inflow of nitrogen and phosphorus in inner lakes in the suburbs of cities.

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