Removal of Provenance Sources of Overwintering Bloom Cyanobacteria in Large Shallow Lakes

Abstract

A removing method of overwintering water-blooming cyanobacteria provenances in large-scale shallow lakes is disclosed. In the overwintering period and the recovery period, algae-controlling agents are respectively used in distribution areas of overwintering water-blooming cyanobacteria provenances twice to perform background removal of overwintering cyanobacteria provenances in water and sediment, wherein the first background removal is performed in the overwintering period, and the second background removal is performed in the recovery period before cyanobacteria recover; and the algae-controlling agent comprises rice straw and H2O2 with effective concentrations. The invention is based on the self-growth and recovery rule of algae; environment-friendly algae-controlling agents are used for prevention and control treatment at provenance regions for cyanobacteria growth and in bottleneck periods - the overwintering and the recovery periods; overwintering water-blooming cyanobacteria provenances in large-scale shallow lakes can be effectively removed; cyanobacteria water bloom can be treated from the source; and the method is a new approach for the prevention and control of the generation of harmful algae water bloom.

Description

technical field [0001] The invention relates to a treatment method for harmful algae blooms in large shallow lakes, in particular to a method for removing the provenance of overwintering algae blooms in large shallow lakes, and effectively removes the provenance of overwintering blooms of cyanobacteria in large shallow lakes through an environmentally friendly biochemical approach. removal, thereby preventing the occurrence of cyanobacteria blooms. Background technique [0002] The frequent occurrence of harmful algal blooms has become an environmental problem of widespread concern at home and abroad. Since the eutrophication level of large shallow lakes cannot be reduced in the short term, it is important to discuss the prevention and control of algal blooms under eutrophic conditions for a long time to come. [0003] At present, the ways to control algae blooms mainly include physical, chemical and biological methods. The physical method is fast and simple, such as the m...

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Problems solved by technology

[0007] However, so far, there is no simple method that can completely successfully prevent and control cyanobacterial blooms. The comprehensive application of multiple approaches such as physics, chemistry, and biology will be the direction of controlling algal blooms in the future; The control period of algal blooms is almost all focused on the imminent occurrence or after the occurrence of algae blooms, which belong to emergency control. However, few studies have combined the occurrence rules of algae itself to prevent and control the bottleneck period of algal bloom formation-the overwintering and recovery stages. It is economical and important to control from the source to prevent and control the dominant algal species of algal blooms before the algae blooms

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