Method for governing ultrophication water body by using stalk of plants

A plant straw and eutrophication technology, applied in chemical instruments and methods, sustainable biological treatment, water aeration, etc., can solve problems such as secondary pollution, high cost, and low possibility, and achieve low investment and low cost low effect

Inactive Publication Date: 2007-10-10
TONGJI UNIV
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Problems solved by technology

Although the above three methods are applicable and can achieve certain results, there are also many shortcomings: physical technology methods, such as sediment dredging, are used more often, and can be applied to rivers and small lakes in urban landscapes; For example, Dianchi Lake, Taihu Lake, Chaohu Lake, etc., it is unlikely, and this method has obvious timeliness. Over time, the bottom mud will grow again; can't fundamentally solve the problem
The advantage of the chemical technology method is that it is easy to implement, the algicidal effect is obvious in a short period of time, and the effect is quick, but the biggest problem with this method is that it is easy to cause secondary pollution, and it will more or less produce toxins on aquatic animals and plants. and toxicity, and chemical substances will accumulate and remain in water, forming long-term hazards; biotechnology methods, that is, the method of adding biological bacteria, will produce a comprehensive effect of inhibiting algae, but this method is expensive, and long-term use will inhibit algae. The original aquatic organisms in the water body change the biological phase of the aquatic animals and plants in the original water body, forming an "exotic" tendency

Method used

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  • Method for governing ultrophication water body by using stalk of plants
  • Method for governing ultrophication water body by using stalk of plants

Examples

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Embodiment 1

[0016] Taking the landscape river of a certain university as an example, before the treatment, especially in summer and autumn, blue-green algae grew wildly, covered with algae blooms, and stinky to the sky, which not only affected the beauty of the campus, but also affected the physical and mental health of teachers and students; the water surface area of ​​the water body: 7567m 2 , with an average water depth of 1.1m; the water quality of the water body: before treatment: pH 9.0, chlorophyll 123mg / l, water temperature 25-27°C; in the project, 15 oxygenators were placed; barley straw was placed at a weight of 25g per cubic meter of water ;After 2 months of treatment, the water body has changed significantly, the transparency has increased from 30 cm before treatment to more than 60 cm, the dissolved oxygen in water has increased from 0-2 mg / l before treatment to more than 6 mg / l after treatment, and the pH is about 7.5 , the minimum chlorophyll reaches 10mg / l (the highest is l...

Embodiment 2

[0018] Taking a landscape water area in a residential area as an example, the area of ​​the water area is about 100 square meters, and the water depth is 1.0 to 1.1 meters. Since the residents of the community moved in, the pool was filled with tap water, and about 300 ornamental fish of various colors were stocked; Every year to the end of spring, summer and autumn, as the temperature rises in the pool, algae grow. When the temperature is high, the pool is full of blue algae, covered with blooms, foul smell, and goldfish die. To change the water once is laborious and time-consuming, and a lot of drinking water is wasted; the specific steps to treat the water body are: place 2 oxygenators in the pool and place 2.5 kg of barley straw; after nearly two months of treatment, the water quality in the pool is getting better every day Get up, until the end of September, the water in the pool is crystal clear, and red, yellow, and blue goldfish roam in the water. Water quality testing...

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Abstract

This invention relates to a method for treating eutrophic water with straw. The method comprises: putting 25-50 mm long straw (23-28 g / m3 water) in a net column bag with a diameter of 15-25 cm, putting the bag 10-15 cm above an aerator, aerating by introducing oxygen at 4-5 mg / L water, staying for 25-35 days at normal temperature, and leaching compounds from the straw to inhibit and kill toxic algae. The method has such advantages as abundant raw materials, and no secondary pollution.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to a method for treating eutrophic water bodies by using plant straws. Background technique [0002] With the advancement of urbanization and the development of industrial and agricultural production in China, a large amount of sewage rich in nitrogen, phosphorus and other pollutants is discharged into rivers and lakes, resulting in serious water pollution, algae growth, and algae blooms; The death of human beings has seriously affected the health of the people. [0003] According to surveys, lakes in my country are heavily polluted, and 50-60% of the water body is in a state of eutrophication; in order to control lake algae, Dianchi Lake spent more than 4 billion yuan, and Taihu Lake spent more than 10 billion yuan, but the effect is not obvious . [0004] At present: the treatment of lakes and rivers with severe eutrophication caused by pollution can ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50C02F7/00
CPCY02W10/10
Inventor 王茹静曹瑞钰刘涛赵旭
Owner TONGJI UNIV
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