Method and system for ecologically controlling cyanobacterial bloom in pond culture water

Abstract

The invention provides a method and system for ecologically controlling cyanobacterial bloom in pond culture water. The method comprises the following step: the system is arranged in the pond culture water, an anode in an electrode combination of the system is iron, and a cathode is iron or copper; the electrode combination and an underwater propeller are respectively connected with a power supply, and the electrode combination snorkels in the culture water through a buoyancy device; the electrode combination is located in the net cage, the underwater propeller is located in the net cage, a underwater fixing piece is fixed to the bottom of a pond, and the net cage is connected with the underwater fixing piece through a rope; and after electrification, the anode of the electrode combination continuously generates iron ions, and the iron ions and phosphate in aquaculture water are subjected to precipitation reaction, flocculation and precipitation for continuous and stable phosphorus reduction, so that the population growth and interspecific competitive advantage of cyanobacteria are reduced, and the cyanobacterial bloom is ecologically controlled. The system has the advantages of being capable of reducing the mass concentration of phosphorus in aquaculture water and the relative density of cyanobacteria, small in size, low in energy consumption cost, free of secondary pollution, easy and convenient to manage and the like.

Description

【Technical field】 [0001] The invention relates to a method and a system for ecologically controlling cyanobacteria blooms in pond culture water bodies. 【Background technique】 [0002] my country is a big aquaculture country, and its aquaculture production accounts for about 68% of the world's aquaculture production, of which pond aquaculture production accounts for about 45%. Due to the feeding of a large amount of feed, in the middle and late stages of pond culture, the concentration of nitrogen and phosphorus in the water often increases rapidly and the water quality deteriorates, which affects the survival and growth of farmed animals. The increase in population density often leads to the outbreak of cyanobacteria blooms, which exacerbates the deterioration of aquaculture water quality; in addition, the tail water of pond aquaculture is basically discharged directly without treatment, resulting in varying degrees of eutrophication pollution to the surrounding water enviro...

AI Technical Summary

Problems solved by technology

However, they all have relatively large application limitations, such as biological floating beds, micro-ecological preparations, and biofilm technologies, which generally have insufficient control effects, and even when affected by factors such as climate, the effects are often uncertain or even invalid; High cost, unsustainable use, may have a negative impact on other water quality factors (such as using copper sulfate to kill cyanobacteria and kill all other beneficial algae in the water body), and even endanger the survival and growth of farmed animals, etc., if long-term The use of a large amount of chemicals may lead to secondary pollution and other problems

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