Preparation method of ecological security flocculating agent for effectively removing phosphorus and algae in eutrophic water body

Abstract

The invention relates to a preparation method of an ecological security flocculating agent for effectively removing phosphorus and algae in a eutrophic water body. The preparation method comprises the following steps of preparing materials, uniformly mixing original clay with water to obtain clay suspension, adjusting the basicity to 50-90% by dropping dilute acid into the clay suspension, uniformly mixing aluminium polychlorid powder with water to prepare aluminium polychlorid solution, adjusting the basicity to 50-90% by dropping dilute acid or dilute alkali into the aluminium polychlorid solution, pouring the aluminium polychlorid solution into the clay suspension, standing and curing at 50-80 DEG C to obtain curing solution, drying the curing solution at 50-80 DEG C, and crushing and sieving to obtain the flocculating agent. According to the invention, the removal rate of total phosphorus is 93% or more; the removal rate of CODCr is 53% or more; the removal rate of total nitrogen is also above 3%; the removal rate of water-blooming cyanobacteria is 96% or more; the removal rate of algal toxin MC-LR is 7% or more; and the risk in rapidly releasing algal toxin is not caused.

Description

technical field

[0001] The invention relates to a preparation method of an ecologically safe flocculant applied to eutrophic water bodies for in-situ efficient phosphorus and algae removal, and belongs to the technical field of water treatment. Background technique

[0002] As far as the applicant knows, since the 1980s in my country, due to the rapid economic development and the relative lag in environmental protection, many lakes and rivers have entered a state of eutrophication, even severe eutrophication, which is inferior to the "Environmental Quality Standards for Surface Water" "(GB3838-2002) Class V. Along with the eutrophication of water bodies, frequent outbreaks of cyanobacteria blooms cause a large number of fish and other aquatic organisms to die, and a large amount of algae toxins are released, resulting in damage to water body functions. In recent years, the restoration of eutrophic water bodies has become a challenging environmental problem all over the world...

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