Algae-eater is a kind of lower crustacean zooplankton, whose scientific name is Daphnia magna, which is distributed all over the world. According to the salinity of waters, it is mainly divided into three geographical subspecies: freshwater population, salt lake population and seawater population. After domestication, they can specialize in eating cyanobacteria and become natural enemies of cyanobacteria.
After fifteen years of domestication, purification and rejuvenation of cyanobacteria, the research team of Professor He of Shanghai Ocean University found that domesticated algae-eating insects can fundamentally solve the problem of removing cyanobacteria from eutrophic water, and obtained the invention patent authorization from the United States and China. In China, more than 500 cases of ecological restoration of black and smelly rivers and lakes have been successfully implemented by using "algae-eating insect technology".
Beneficial microorganisms carried by algae-eating insects can improve the survival rate of submerged plants in the early stage of planting, promote the construction of submerged plant communities, and fundamentally solve the problem of removing cyanobacteria in eutrophic water.
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Using "algae-eating insect technology" to restore water ecology means using "algae-eating insects" to eat all kinds of algae and organic debris in lake water and quickly improve the transparency of water body; Re-plant and restore underwater plants, and put aquatic animals such as fish, shrimp, snails and shellfish into the water body to form a healthy and complete clean water ecosystem.
The adoption of "algae-eating insect technology" does not require dredging, and the effect is quick. After 60 days of centralized management, submerged plants gradually grew, and the water transparency reached 1 m. After 90 days of centralized management, the ecosystem is basically stable, and the water transparency reaches 1.5-2 meters; After 12 months of centralized management, an "underwater forest" was formed, and it was crystal clear within 3 meters.
After the underwater ecosystem is formed, there is no need to change water regularly, the water quality is stable and does not rebound, and the later maintenance is simple. The longer the time, the better the water quality, and the maintenance cost is reduced year by year.
People's Network-the first pilot project of biological water purification technology for algae-eating insects in Chongqing (photos)
People's Network-Eating algae and insects makes Bijin Lake clear.