Method for controlling whole process of cyanobacterial bloom development in large shallow lake

Abstract

The invention discloses a method for controlling a whole process of cyanobacterial bloom development in a large shallow lake. According to the method, the cyanobacterial bloom development is divided into five stages, namely cyanobacterial wintering period, a recovery period, a rapid growth period, an outbreak period and a cyanobacterial decline period, the spatial distribution characteristics of cyanobacteria in different stages of the cyanobacterial bloom development are determined, and different treatment methods are adopted for different stages of the cyanobacteria bloom development. By themethod, a method for systematically preventing and controlling the whole process of the cyanobacteria bloom development is provided for the first time, prevention and control of the cyanobacteria areextended all the year around, the current situation that the effect is very weak because the prevention and control of the cyanobacteria only aims at cyanobacterial bloom in summer is overcome, and the occurrence intensity and the probability of the cyanobacterial bloom can be effectively reduced throughout the whole year and in the whole process.

Description

technical field [0001] The invention belongs to the technical category of water environment treatment and cyanobacteria bloom control in the fields of environmental science, environmental engineering and ecological engineering, and specifically relates to eutrophication treatment of large shallow lakes, reservoirs and their water sources, lake bays, etc., control of cyanobacteria blooms and other technologies. Ecological Restoration Technology. Background technique [0002] The control of cyanobacteria blooms in existing large shallow lakes is mainly during the period of cyanobacteria blooms in summer. At this time, the cyanobacteria biomass is large and the distribution area is wide. The common emergency measures are salvage, including manual salvage, using cyanobacteria salvage boats, and algae fishing. Platforms and algae-water separation stations collect and dispose of cyanobacteria blooms. The amount of cyanobacteria that can be processed is very limited, and it is diff...

AI Technical Summary

Problems solved by technology

[0002] The control of cyanobacteria blooms in existing large shallow lakes is mainly during the period of cyanobacteria blooms in summer. At this time, the cyanobacteria biomass is large and the distribution area is wide. The common emergency measures are salvage, including manual salvage, using cyanobacteria salvage boats, and algae fishing. Platforms and algae-water separation stations collect and dispose of cyanobacteria blooms. The amount of cyanobacteria that can be processed is very limited, and it is difficult to effectively change the current situation of high-biomass cyanobacteria accumulation.

Chinese patent CN101456603B discloses a method for controlling algal blooms in eutrophic reservoirs, which combines water flow baffles, ecological floating islands, physical shading, and in-situ aeration technology, and uses water flow baffles to divide light control separation areas in water intakes And the enhanced purification area, the source water flows through the water flow partition and then enters the light control separation area. Due to the lack of light in this area, harmful algae quickly float on the water surface and are intercepted and captured by the roots of floating island plants, which is very important for reducing algal blooms. Cyanobacteria have a certain effect, but it does not involve the harvesting and disposal of blooming cyanobacteria, and the water area of ​​its effect is relatively limited

The content disclosed in this invention technology is mostly a conceptual method. Except for the total number of fish and snails stocked, it does not specify the stocking ratio, the density of zooplankton stocking and regulation, the density of algae-eating microorganisms, and the number of aquatic plants planted. difficulty

There is also the use of microorganisms such as cyanophages and alginolytic bacteria to control cyanobacterial blooms, such as CN102134126B, CN102206605B, CN102352326B, CN103509744B, CN103509745B, etc., which play a good role in controlling algae in small water bodies and landscape water bodies, but for the application of large lakes There are risks and the effect is not ideal

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