Method for efficiently removing phosphorus in eutrophic water

Abstract

The invention discloses a method for efficiently removing phosphorus in eutrophic water. The method is concretely characterized in that cement and bentonite are used as a phosphorus removal agent, thephosphorus removal agent contains, by mass, 80% of cement and 20% of bentonite, and the amount of the phosphorus removal agent added to water to be treated is 0.025-0.2% of the mass of the water to be treated. The method comprises the following steps: adding the phosphorus removal agent to the water to be treated, performing uniform mixing, carrying out a reaction, and standing the obtained waterto complete the treatment of the water. The phosphorus removal agent is powdery, can be directly added into the water, and can be uniformly dispersed in and reacted with water, so the method does notneed other special facilities and makes phosphorus removal operation simple. The phosphorus removal agent used in the method of the invention has lower cost than conventional phosphorus removal agents currently used in the market, so the method has the advantages of easily available raw material, and easiness in industrialization realization. The total phosphorus content of the water treated through the method can quickly reach relevant standards.

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, relevant departments and agencies in my country have adopted a series of action plans and measures. However, the problem of eutrophication in water bodies has not been fundamentally resolved, and a large number of problems still exist. [0003] According to the national surface water environmental quality status reported by ...

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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 the ability to remove phosphorus are not aimed at eutrophic water bodies, so the effect of using them in eutrophic water bodies is not outstanding

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