Method for systematically controlling rapid proliferation of cyanobacteria cells in lakes in spring

[0024]From March to June 2017, the area within a semi-closed weir in the west half of the Chaohu Lake was selected to carry out a demonstration of algae control technology for the rapid growth period of cyanobacteria.

[0025]Flexible enclosures were used to close three control water areas, each with an area of 600 m2, 1800 m2 in total.

[0026]After completion of the closure of the control water areas, algae control measures were taken for the rapid growth period of cyanobacteria; environmentally friendly chemicals were used first, 40% FeCl3+CaCO3 was injected into the surface sediment to make Fe3+ reach about 300 g / m2 and then 50% Ca(NO3)2 was injected into the surface sediment to make NO3—N reach 10 g / m2 to control the release of phosphorus in the bottom sediment and promote the denitrification process on the sediment surface;

[0027]After completion of the above measures, 10 mg / L H2O2 was used to kill algae cells and then 20 mg / L chitosan modified soil was added to the water body t

[0034]From March to June 2015, the experimental enclosure ecosystem of the Taihu Station, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences was selected to carry out a demonstration of algae control technology for the rapid growth period of cyanobacteria. The control effect was observed until August.

[0035]Flexible enclosures were used to close three control water areas, each with an area of 100 m2, 300 m2 in total.

[0036]After completion of the closure of the control water areas, algae control measures were taken for the rapid growth period of cyanobacteria; environmentally friendly chemicals were used first, 40% FeCl3+CaCO3 was injected into the surface sediment to make Fe3+ reach about 300 g / m2 and then 50% Ca(NO3)2 was injected into the surface sediment to make NO3—N reach 12 g / m2 to control the release of phosphorus in the bottom sediment and promote the denitrification process on the sediment surface;

[0037]After completion of the above measures, 15 mg /

[0044]From March to June 2016, the estuary water area of the Nanfei River into the Chaohu Lake was selected to carry out a demonstration of algae control technology for the rapid growth period of cyanobacteria.

[0045]Flexible enclosures were used to close a control water area, with an area of 10,000 m2. The control effect was observed until September.

[0046]After completion of the closure of the control water area, algae control measures were taken for the rapid growth period of cyanobacteria; environmentally friendly chemicals were used first, 40% FeCl3+CaCO3 was injected into the surface sediment to make Fe3+ reach about 300 g / m2 and then 50% Ca(NO3)2 was injected into the surface sediment to make NO3—N reach 11 g / m2 to control the release of phosphorus in the bottom sediment and promote the denitrification process on the sediment surface; After completion of the above measures, 12 mg / L H2O2 was used to kill algae cells and then 30 mg / L chitosan modified soil was added to the w