A combined restoration method for eutrophic lakes

Abstract

The invention relates to the technical field of ecological engineering and water treatment, and particularly discloses a combined restoring method for a eutrophic lake. The combined restoring method comprises the following steps: using a biological filter, a biologic nest, a flow generating system, a biologic membrane purification system, an aquatic ecosystem and an ecological floating island in a combined manner to treat the eutrophic lake water, providing necessary conditions for water body ecological restoration, constructing a healthy lake ecosystem, and improving the self-cleaning capacity of the lake water body, so as to achieve the targets of purifying the lake water body and restoring the aquatic ecology; when in the rainstorm process, a lot of sewage is discharged into the lake to cause impact pollution, or a lot of alga emerges in the lake, a bacterial purifying preparation can be sprayed to the lake, so that blue-green alga and green alga outburst can be effectively prevented or inhibited. The combined restoring method disclosed by the invention is free of secondary pollution, low in operating cost in the later period, good in restoration effect, and long-lasting in purifying effect, and can meet the large-scale engineering treatment requirements.

Description

technical field [0001] The invention relates to the technical fields of ecological engineering and water treatment, in particular to a combined restoration method for eutrophic lakes. Background technique [0002] Eutrophication is a water pollution phenomenon caused by excessive plant nutrients such as nitrogen and phosphorus. Under natural conditions, as the river entrains alluvium and the remains of aquatic organisms continue to settle and deposit on the bottom of the lake, the lake will transition from a flat nutrient lake to a eutrophic lake, and then evolve into a swamp and land. This is an extremely slow process. However, due to human activities, after a large amount of industrial wastewater, domestic sewage, and plant nutrients in farmland runoff are discharged into slow-flowing water bodies such as lakes, reservoirs, estuaries, and bays, aquatic organisms, especially algae, will multiply in large numbers, making the population of biomass The number of species chang...

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Problems solved by technology

[0004] The present invention aims at the problems of low processing efficiency, secondary pollution and high operating cost in the existing lake repair and treatment technology, and provides a method for eutrophic lakes, which has good repair effect, more environmentally friendly process, easy operation and management, less investment in the later stage and A joint repair method that can meet the requirements of scale and engineering

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