Advanced purification method for enclosed water area

Abstract

The invention provides an advanced purification method for an enclosed water area. The method comprises the following steps: (A1) water drawing step, namely water is drawn from at least two water drawing positions in the enclosed water area and is delivered to a coagulating basin, wherein the water drawing positions are located in the bottom of the enclosed water area, and water flows from a water distribution position to the water drawing positions; (A2) purification step, namely colloid and suspended solids in the water are coagulated into a flocculating constituent in the coagulating basin under the action of water and a coagulating agent, bubbles having a diameter of 1-10mu m are introduced into the water, and foam or scummings are formed on the water surface; water without foam or scummings flows through a filter material, the filter material is compacted, suspending solids in the water are entrapped, and a reactive bio-film is formed on the surface of the filter material; and (A3) water distribution step, namely the purified water is returned to the water distribution position of the enclosed water area, and the water distribution position is located in the upper part of the enclosed water area. The method has the advantages of low operation cost, high efficiency and the like.

Description

technical field [0001] The invention relates to water purification, in particular to a deep purification method for closed water areas. Background technique [0002] In the process of city formation and development, urban rivers, as important resources and environmental carriers, are related to urban survival, restrict urban development, and are important factors that affect urban style and beautify urban environment. The water in urban rivers in our country turns black and smelly, and the phenomenon of algae breeding is becoming more and more serious. According to the survey, about 50% of the urban rivers in our country are polluted to varying degrees. It is an urgent need for social and economic development and the construction of urban landscape and ecological environment to repair these water bodies. Water pollution in urban rivers in my country mainly includes nitrogen, phosphorus and other nutrients and organic pollution, and the sources of pollutants are complex, inc...

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Problems solved by technology

The physical method mainly includes diversion of water to scour silt (referring to the introduction of external clean water sources to improve the water quality of river water. This method not only requires the availability of clean water sources nearby, but also has no advantages in terms of residence time control, diversion flow control, and energy consumption), Pollution interception and pollution control (refers to collecting the sewage that was originally discharged directly into the urban river water body to the sewage treatment plant for treatment and then discharging it. The disadvantage of this method is that there are no sewage interception and management facilities in relatively scattered residential areas, and it is necessary for the already The polluted black and odorous water body needs to be repaired by other processes); the chemical method mainly refers to the use of chemical agents to remove pollutants in water, such as adding different types of new polymer synthetic agents to water to remove pollutants in water bodies. The application of this method is more suitable for emergency treatment, but not suitable for establishing a long-term ecological environment; ecological-biological methods mainly include biofilm method, aquatic plant system, biological agent, river aeration, biological manipulation and other technologies, ecological-biological The method is a very friendly method to the environment, but only relying on this method requires a long period of time

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