Method for treating landscape water body eutrophication pollution

Abstract

The invention relates to a method for treating eutrophication pollution of landscape water, and combines a physical-chemical technique and an ecological floating island technique, utilizing a constructed enclosure to divide an ecological purification area and a strengthening purification area in the landscape water and plant an ecological floating island in the ecological purification area. Besides the ecological floating island planted in the strengthening purification area, a medicine feeding system and an aeration system are also arranged in the strengthening purification area; by utilizing a diving pump, the landscape water is led to the purification areas; the medicine feeding system and the aeration system are opened; through the effects of physical-chemical adsorption and coagulation settlement, pollutants are rapidly removed; at the same time, the ecological floating island closely distributed on the water surface has good effects of wind and storm resistance and light screening, thus providing a good hydraulic condition for the settlement of the pollutants; due to a loss of light source, the algae settling under water can not float any more, thus dying gradually; in addition, a certain quantity of nutrition salt released in a decomposition of the pollutants and dying of the algae can be fully absorbed by the ecological floating island; the high quality water treated in the ecological purification areas flows back to the landscape water.

Description

technical field [0001] The invention relates to a method for treating eutrophication pollution of landscape water body, which combines physical and chemical technology with ecological floating island technology to effectively control the pollution of landscape water body. It belongs to the field of environmental engineering technology. Background technique [0002] In recent years, urban landscape water bodies such as large and small lakes and artificial lakes have become the focus of urban landscape construction. In order to meet the "water-friendly" needs of the residents of the residential quarters, the architects used borrowed scenery and landscaping to introduce waterscapes into the living quarters to create an elegant natural environment in the residential quarters. Landscape water has become the highlight of the city landscape, and also an important selling point of high-end residential quarters. Since landscape water is mostly static or closed slow-flowing water wi...

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Problems solved by technology

[0004] 1. Even if the concentration of nitrogen and phosphorus in landscape water (TP>0.02mg / L, TN>0.2mg / L) is extremely low, it is enough to cause excessive proliferation of algae, so it is difficult to prevent and control water blooms by reducing nutrients

[0005] 2. When the environmental conditions are suitable, the algae proliferation in the landscape water body is extremely fast, and the algae density can be more than doubled in less than 2 days. Conventional water treatment devices are difficult to cope with such a high pollution load

[0006] 3. It is difficult to coordinate the appearance of the water treatment device with the landscape water body

This method can achieve an immediate algae removal effect, but it has the most significant disadvantage, that is, although the algae condense and settle into the bottom of the water, they still survive, and the general landscape water body is relatively shallow, and the illuminance at the bottom is sufficient to support the growth and reproduction of algae. After a period of time, it will resume its activity and re-float, causing more serious water blooms; in addition, the precipitated pollutants and algae will also re-release nitrogen and phosphorus into the water after a long time

The shading method is also a practical technology that has received widespread attention recently. Its principle is to use physical shading materials to cover more than 1 / 3 of the water surface to inhibit the growth and reproduction of blue-green algae. The disadvantage is that it has no effect on removing nutrients such as nitrogen and phosphorus in the water. The required shading area is too large, seriously affecting the landscape effect

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