At present, the landscape water body is an important part of the urban ecosystem. With the acceleration of China's industrialization process, its pollution problem is becoming more and more prominent. Based on this background, this paper proposes the concept of effectively integrating water circulation treatment with garden landscape. Thereby obtaining good ecological and social benefits.
1 Introduction
In the urban ecosystem, the landscape water body is an important part of it. However, with the acceleration of the current industrialization process, the pollution of the landscape water body is getting heavier and heavier. How to effectively treat the polluted water body is very necessary. . At present, there are many methods for water purification treatment, but the traditional treatment methods gradually highlight its drawbacks. In this paper, the idea of ??effectively integrating water circulation treatment with garden landscape is proposed, which can not only effectively treat contaminated water bodies, but also It can increase the landscape effect, and finally obtain certain ecological and social benefits, which is worthy of promotion in practical applications.
2. Current pollution status of urban garden landscape water bodies
With the rapid development of China's industry, many urban water bodies have suffered from different degrees of pollution, which not only reduces their aesthetic value, but also weakens the function of tourism and tourism, and can not obtain the social and environmental benefits they deserve. At present, due to the slower flow rate of water in the city, it gradually causes serious pollution of eutrophication, and even some urban water bodies have reached the level of supernutrition. Moreover, this serious trend has already occurred in many cities in China, and there is even a tendency to spread.
In addition to the eutrophication problem in large water bodies in cities, other small garden landscapes have outstanding problems such as low water capacity, poor self-purification capacity, wide pollution sources and small water area. Make it more susceptible to pollution and damage.
At present, in addition to a small number of water bodies that are directly discharged as domestic sewage, the landscape water body is seriously polluted. The water quality of most landscape water bodies is low in pollution level compared with domestic sewage, farmland discharge water, etc., which is micro-polluted water body or light. Degree of pollution of water bodies, therefore, should be given full attention and attention, and take effective governance and management work.
Before dealing with water bodies in urban landscapes, it is necessary to understand the main sources of pollution in urban landscape waters. In general, the source of pollution in urban waters is mainly a source of pollution and non-point source pollution. For point source pollution sources, there are mainly urban industrial wastewater, domestic sewage, sewage treatment plant effluent and landfill leachate, etc., while point source pollution mainly includes urban runoff and agricultural runoff from urban upstream agricultural areas. At present, for non-point source pollution, due to the high pollution load, the control is very difficult and has received more and more attention.
3. The idea of ??water circulation treatment and garden landscape integration
In view of the shortcomings of traditional gardening methods such as drug spraying and filtration, the use of microbial degradation, chemical action of plants and physical effects of fillers will enable deep purification of wastewater and recycling of water resources. There is no odor in the treatment process, and the low temperature in winter does not affect the water treatment effect. The schematic diagram of its processing is as follows:
For the constructed wetland, firstly, the raw water needs to be recharged in the artificial wetland. The source of the raw water supply is mainly the rainwater or the construction precipitation of the surrounding buildings. Before the replenishment, the water quality of the raw water needs to be monitored. If the water body needs to be purified, The pump is used to pump the raw water to be treated to the water circulation treatment system of the landscape.
In the garden landscape where the raw water enters into the water circulation system, it will first be treated with oxygen in the water aeration tank, and then flow through the first-class biological pool, the first-stage gravel bed, the second-level biological pool, and the second. The gravel bed is filtered, dephosphorized and nitrogened, and finally flows back into the landscape lake through the underground pipeline.
The raw water treated by the water circulation treatment system can be applied in many aspects. On the one hand, it can be used for waterscape and irrigation in urban garden landscapes, on the other hand, it can effectively achieve the effect of improving regional climate and improving local ecological environment. Promote in practice.
4. The principle of water purification of the garden landscape
Through the integration of the water cycle and the garden landscape adopted in the above paper, it can be seen that the purification of water quality mainly plays an important role in the triple coordination of biology, physics and chemistry. In the process, various water treatment methods such as absorption, filtration, plant absorption, microbial degradation and filtration are effectively utilized. Under the combined action, the contaminated water is effectively purified, and the pollutants in the water are also obtained. Efficient decomposition. The water purification system not only removes organic matter, but also removes nitrogen and dephosphorizes and removes heavy metals, which can achieve very good treatment results.
The falling water aeration tank and the descaling filter are mainly used for derusting iron ions in the polluted water body. Under normal circumstances, the pollutants in the sewage can be mainly divided into three categories, the first type of pollutants are suspended matter, the second type of pollutants are organic pollutants, and the third type of pollutants are inorganic salt nitrogen and phosphorus. For the treatment of suspended solids in the first type of pollutants, the adsorption and precipitation are mainly used. In this system, the comprehensive ecological treatment process based on the plant gravel bed can achieve good results, and the removal rate can be generally achieved. More than 90%. For the organic pollutants in the second type of pollutants, the root system of the higher water plant ponds and the plant roots and the biofilm on the gravel surface in the plant gravel bed are mainly used, and the method of first adsorption and post biodegradation is adopted. Effectively eliminated. Finally, in the elimination of the third type of pollutants as inorganic salts nitrogen and phosphorus, the former is mainly accomplished by the absorption of plants, microbial accumulation and the coordination of gravel beds. For the elimination of the latter, part of it is effectively absorbed by the plant roots, and the other part is escaped from the system by the action of denitrifying bacteria under anaerobic conditions.
5. Water circulation treatment and garden landscape complement each other
The garden landscape itself is a beautiful landscape in the city. The effective combination of water circulation treatment can achieve good results. The two complement each other and are indispensable. On the one hand, the water circulation treatment system needs to meet the water treatment requirements of the urban garden landscape. On the other hand, the water circulation treatment system adopted in this paper can also meet the landscape requirements of the garden itself. Therefore, in practice, the factors of the two should be considered in depth. In general, the water circulation system is distributed under the greening.
In the perfect integration of water circulation treatment and garden landscape, it will surely create beautiful ecological and landscape effects on the basis of meeting the requirements of water treatment, for example, planting a variety of aquatic garden plants and enriching the landscape in the garden. Diversity can also play an important role in the ecological balance of the garden.
The middle sedimentation tank is mainly planted with aquatic plants such as reed and cattail, which are lush and windy; the outer layer is reasonably planted with various garden plants, and the landscape effect is outstanding. The water system is the main line of the entire garden landscape, thus creating a beautiful landscape of the landscape, making people forget to return.
6, the conclusion
In summary, water resources are related to China's national economy and people's livelihood, which is the material basis for human survival. Without water, there is no life. Based on the current serious pollution situation of urban landscape waters, this paper proposes an idea based on the in-depth integration of water recycling and garden landscape. After practical application, it has achieved good ecological and environmental benefits. The author believes that with the progress of China's water recycling technology in the future, the quality of urban landscape water treatment will certainly reach a new level.
