Method for removing or inhibiting alga in eutrophic water

Abstract

The invention discloses a method for removing or inhibiting alga in eutrophic water. The method is characterized in that clay and clayey soil are taken as primary raw materials to produce ceramsite, and the ceramsite is pre-processed; the pre-processed ceramsite is produced into phosphorous removal modified ceramsite and iron removal modified ceramsite; the phosphorous removal modified ceramsite and the iron removal modified ceramsite are filled into an alga removing device; the alga removing device is transported to the place where algal bloom takes place, the alga removing device in water issalvaged after soaking is conducted for 5-7 days, and the modified ceramsite which completely absorbed alga is poured out. The method has the advantages that on one hand sunlight can be shaded usingthe alga removing device so that the alga in the water cannot perform photosynthesis to inhibit the growth of the alga, on the other hand, the growth of alga cells is inhibited due to limited nutrients, the modified ceramsite which completely absorbed the alga can be used for producing fertilizers for potted flowers, the generation of rubbish is avoided, and resources are recycled, which is more environmentally friendly.

Description

technical field [0001] The invention belongs to the technical field of water body treatment, in particular to a method for removing or inhibiting algae in eutrophic water body. Background technique [0002] When the freshwater body is in a eutrophic state, suitable conditions such as temperature, light, climate and hydrology can easily induce algal blooms. Affected by global warming and human activities, the process of eutrophication in freshwater lakes, reservoirs, and even rivers around the world has accelerated in recent years, and algal blooms have continued to appear. Water blooms have occurred in important lakes such as Taihu Lake, Chaohu Lake and Dianchi Lake in my country for many times, and the density of algae cells even reached 10 in the worst case. 9 A / L, lost the normal function of the water body, posed a threat to the safety of drinking water for residents along the coast. [0003] Putting chemical reagents that can kill algae into water can kill algae in a s...

AI Technical Summary

Problems solved by technology

[0003] Putting chemical reagents that can kill algae into the water can kill algae in a short time, but this method is neither scientific nor economical. The chemical reagents put in will cause new environmental pollution or destroy other aquatic organisms. Ecological balance, and the algae killed by chemical reagents still exist in the water body, and will inevitably cause secondary pollution to the water body after decay

Although the physical algae removal method will not produce secondary pollution, it is expensive and cannot be applied to large-scale algae outbreaks

Images