Method for collecting blue algae and purifying water quality

Abstract

The invention discloses a method for collecting blue algae and purifying water quality by breeding algae-eating fishes in a water body. The method provided by the invention is characterized in that a plurality of uniformly distributed net cages used for breeding algae-eating fishes are arranged in an algae-controlling water area; the bottom of each net cage is equipped with a fish manure collector which is made from a dense net; the algae-eating fishes are bred in the net cages; and an algae manure interception net is arranged on the edge of the water area in which the net cages are disposed.According to the invention, the algae manure interception net, a fish-interception and blue algae-capture module and an ecological floating-island water quality purification module are arranged in local water areas, so as to effectively control the biomass of blue algae in water source areas, effectively reduce the content of N and P in a water body, improve the safety of water consumption, and obtain the cycling support economically.

Description

technical field [0001] The invention relates to a method for treating lake water quality, in particular to a method for ecologically treating lake cyanobacteria and purifying water quality. Background technique [0002] Classic "biomanipulation" relies on zooplankton to control algae. In shallow lakes, zooplankton quickly decompose and release algae after eating them, and then enter the material cycle. After the algae are ingested by zooplankton, N and P do not leave the ecosystem; in my country's large shallow lakes, the number of zooplankton is generally not large, and zooplankton have a great impact on the environment. Phytoplankton feeding pressure is not high; zooplankton are also ineffective in controlling filamentous algae and colony-forming cyanobacterial blooms. In addition, zooplankton are important trophic pathways between phytoplankton and economical aquatic animals such as fish. If the zooplankton are not utilized, the energy of the phytoplankton will not be ut...

AI Technical Summary

Problems solved by technology

[0005] 2) The distribution of cyanobacteria in large eutrophic lakes is uneven

It is not possible to control blue-green algae by stocking silver carp and bighead carp. If the threshold density is not reached, blue-green algae may increase;

[0007] 4) Fish can control cyanobacteria, but they cannot control all algae, nor can they reduce N and P to control eutrophication, let alone form a stable and benign ecosystem

[0010] The existing floating bed technology used to improve water quality is single, and it is generally difficult to carry out in open waters with strong waves. A single water purification technology can solve a certain problem, but it is rarely targeted from the perspective of ecosystem structure and function design

Many current water ecological restoration measures cannot maintain the re-operation of ecological restoration engineering facilities because they cannot directly obtain economic benefits or less

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