How to maintain landscape water system?

Villa water systems are generally artificial ponds (artificial lakes) or streams, mostly completely closed unnatural water bodies, with extremely low self-purification ability and easy deterioration of water quality. Because there are many pollution factors in open waters, the water treatment of villa water system is also very difficult and requires high technical content. On the other hand, due to the lack of environmental protection knowledge of some property personnel, the water quality was destroyed unconsciously, which further aggravated the pollution of villa water system. To maintain the water system well, we need to start from two stages: maintenance and management, and it is also very important for relevant personnel to further learn and strengthen environmental protection knowledge.

First, the maintenance phase

1) It is forbidden to put feed into the water to prevent the water quality from deteriorating artificially. Fish will never starve to death. Fish should eat fish, insects, geese, ducks and eat small fish, forming a natural biological chain. Because excessive feed and excreta of fish, geese and ducks will rot into high-concentration pollutants in water, the pollution load will increase greatly, and the pollution indexes such as total nitrogen, total phosphorus and COD will rise sharply. We can do a simple experiment: raise fish in a fish tank and feed them regularly every day. It can be found that the water in the fish tank will become smelly and turbid in less than a week.

According to "China Pollution Investigation Bulletin" issued by the state, the source of water pollution in China mainly comes from agriculture, among which livestock breeding is the most serious. The chemical oxygen demand, total nitrogen and total phosphorus of livestock and poultry farming account for 42%, 265, 438+0.74% and 37.74% of the water body respectively.

It is reported that in East Lake, Wuhan, the whole aquatic ecosystem was unbalanced and the water pollution was extremely serious because fish farming was once advocated and a large number of herbivorous fish were released, and it cost 2 billion yuan to control the water pollution again. Qingshui River in Hubei Province also caused a series of water pollution problems because of a large number of cage fish farming. Even tap water from river water smells like fish. Later, under the strong protest of local residents, cage fish farming was banned.

It is precisely because of the serious pollution of livestock and poultry breeding to water bodies that it has risen to the legal level, and it is forbidden to breed in water sources and key protected waters. Article 58 of the Law on Prevention and Control of Water Pollution in People's Republic of China (PRC), which was implemented in 2008, clearly stipulates that "cage culture, tourism, fishing or other activities that may pollute water bodies are prohibited in drinking water source protection areas". It can be seen that this behavior of putting a lot of feed into the water is also a violation of the water pollution prevention and control law.

2) Avoid using reclaimed water as far as possible as the supplementary source water, because the water quality standard of reclaimed water is far from the national standard requirements of landscape water, mainly because ammonia nitrogen, total nitrogen and total phosphorus seriously exceed the standard, which further aggravates water pollution.

3) Fish breed very fast and have no natural enemies. Every year, the property should catch fish in time and control the number of fish not to exceed the standard;

4) It is forbidden to put the cut grass into the water to feed the fish, so as to prevent the grass from rotting in the water, increase the organic matter content and cause serious pollution of the water body.

5) Use pesticides and fertilizers as little as possible in the process of planting lawns and trees on the shore green space, so as not to flow into the lake with rainwater and cause lake pollution.

6) Reclaimed water in residential areas should be directly used to irrigate green space, instead of injecting reclaimed water into the lake and pumping water from the lake to irrigate the land. Because in this process, the high concentration of nitrogen and phosphate fertilizer in the water has diffused into the lake, causing eutrophication of the lake and the outbreak of cyanobacteria, which is harmful to everyone.

7) Do a good job in regularly salvaging solid wastes (garbage and leaves) on the water surface.

Second, the governance stage.

In the whole process of water system maintenance, the selection of pretreatment technology is very important. If the previous management work is not done well, it is futile to make further efforts in the follow-up maintenance. Generally speaking, landscape water treatment methods can be roughly divided into indirect purification methods (air flotation technology and filtration technology) and direct purification methods (animal and plant ecological treatment technology and HDP direct purification method).

1) The * * same mode adopted by the indirect purification method is mainly to extract water from the lake, purify it in the external water treatment machine room and then inject it into the lake. Common filtration method and air flotation method belong to indirect purification method. The biggest problem of this model is the bottleneck of the cycle. Due to the construction cost and land limitation by the lake, the water treatment machine room cannot be very large. When the water volume reaches several thousand cubic meters or even tens of thousands of cubic meters, the cycle of water treatment will be very long, only once every few days. In summer, the lake water is polluted quickly, and it becomes dirty without waiting for further treatment. Even though the effluent quality of the treatment machine room is good, the whole lake water is still dirty after being mixed with the water of the Great Lake. On the other hand, pumping water from the lake requires a lot of electricity, and building a treatment room also requires more expenses.

2) Direct purification method is the direct treatment of water in water body, which mainly includes the traditional methods of planting aquatic plants, raising fish and applying chemicals and the latest generation technology of HDP direct purification method. Planting aquatic plants and raising fish have a weak effect on water control, so dosing is a short-term emergency, not a long-term solution. HDP direct purification method draws lessons from the biological purification principle of sewage treatment plant, and constructs a powerful biological purification system inside the water body. By providing carriers to cultivate a large number of indigenous microorganisms in the water, a large number of microorganisms aerobic decompose organic pollutants in the water in an environment with sufficient dissolved oxygen and running water, and realize sewage purification. Therefore, the lake water has a very high self-purification ability, which can decompose and digest foreign organic pollutants in time and keep the water clean all the year round.

In addition, the "super-large-flow aerator" used in HDP direct purification method, through the principle of energy conversion, amplifies the flow of water pump by 20 times, creates a huge oxygen-enriched circulating water flow, makes the water flow sufficient, and realizes the highest state of natural purification of "flowing water is not rotted". The lake water can be circulated 10-20 times a day, which is several times faster than the indirect purification method, completely eliminating the bottleneck of the circulation period of the indirect purification method.

HDP direct purification method does not need to pump water from the lake, which saves a lot of energy to some extent. Moreover, this technology of direct restoration of raw water does not need to occupy additional land, saving land resources and civil engineering investment.

Compared with indirect purification method, HDP direct purification method has great comparative advantages in terms of cycle, treatment effect, investment saving, land occupation saving and operation cost saving, and can be called the latest generation technology in landscape water treatment industry.

Third, summary.

In order to maintain a clear and clean villa water system for a long time, we need to do two things: one is to choose the appropriate water treatment method, and the other is to learn environmental protection science knowledge in future management and maintenance to avoid polluting the water environment. Both are indispensable. Basically, it can be said that a successful villa water system has seven points in governance (advanced rationality of governance methods) and three points in maintenance (nondestructive maintenance of water system).