A method for efficiently removing phosphorus in eutrophic water

Abstract

The invention discloses a method for efficiently removing phosphorus in nutrient-rich water bodies. Specifically, cement and bentonite are used as phosphorus removal agents, and the mass ratio is 80% of cement and 20% of bentonite. The addition amount of the above-mentioned phosphorus removal agent in the water body to be treated is 0.025%-0.2% in parts by mass. The above phosphorus removal agent is added to the water body to be treated, mixed, reacted, and left to stand, and the treatment of the water body can be completed. The dephosphorization agent of the present invention is in powder form and can be directly added into the water body. After being added, it can be evenly dispersed in water and reacted with water. Therefore, the present invention does not need to add other special facilities and equipment, and the dephosphorization operation is simple and convenient. The cost of the phosphorus removal agent used in the method of the invention is lower than that of the conventional phosphorus removal agent currently used in the market, and the raw materials are easy to obtain and easy to realize industrialization. After being treated by the method, the total phosphorus in the water body can quickly reach the relevant standard.

Description

technical field [0001] The invention relates to a method for removing phosphorus from water bodies, in particular to a method for efficiently removing phosphorus in nutrient-rich water bodies using Portland cement or ordinary Portland cement as the main raw material. Background technique [0002] With the rapid development of social economy, water eutrophication has become a challenge to the environmental management of rivers, lakes and reservoirs, as well as urban and agricultural waters around the world. Due to the social and economic losses and ecological damage caused by it, it has become the focus of attention at home and abroad. . Since the 1980s, my country's relevant departments and agencies have adopted a series of action plans and measures. However, the problem of water eutrophication has not been fundamentally solved, and a large number of problems still exist. [0003] According to the national surface water environmental quality status reported by the Ministry ...

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Problems solved by technology

[0014] 1. The composition of chemical reagents is complex, and a variety of chemical reagents are used to cause secondary pollution to water bodies;

[0015] 2. The time of interaction with water is short, and it sinks to the bottom of the water quickly, which is not conducive to the removal of phosphorus from eutrophic water bodies such as rivers and lakes;

[0016] 3. The cost of phosphorus removal agent is high and the required facilities are complicated;

[0017] 4. Some phosphorus removal agents and phosphorus removal methods with phosphorus removal ability are not aimed at eutrophic water bodies, so the effect of using them in eutrophic water bodies is not outstanding

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