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Brief Introduction of Landscape Water Treatment

2016-10-22 02:47:18

        Exquisite water features can be pleasant to the human spirit, but also has increased air humidity, reduce dust, increase the content of negative oxygen ions, in a small range of climate regulation and other functions. But because of the landscape water mostly static or poor mobility of the closed slow flow of water, the water environment capacity is small, vulnerable to pollution, prompting the proliferation of algae and other aquatic organisms, water transparency decreased, and even the formation of "water", water quality deterioration, resulting in odor , A serious impact on the surrounding natural environment and the living environment of residents, which has become the city's ecological environment in the construction of a problem.

        1. Mechanism of landscape water pollution.
        Landscape water pollution generally due to the following several, one is the landscape water itself is not liquidity, poor reoxygenation, bio-oxidation of organic matter is weak, so the water body self-purification capacity is poor. Second, foreign pollution, such as garbage, debris, dust, leaves, rain into the pollutants, other wastewater discharge, etc., these substances in water decay, diffusion, dissolution, precipitation, or directly into a large number of organic matter, inorganic Material, so that further deterioration of water quality. Third, the landscape water purification of biological organisms in a single, not the formation of the corresponding biological chain, resulting in purification of biological growth difficulties. Fourth, the landscape of water pollution, many of the original harmless substances into the water body into the sediment which, after a period of time, the harmless substances between the chemical reaction to produce harmful pollutants, the water body worse.
        2. Landscape water treatment methods.
        Once the pollution of landscape water, you need to conduct water quality maintenance, water quality maintenance is to control the water COD, BOD5, TN, TP and other pollutant content and growth of algae, to keep the water clear and clean.
Existing landscape water treatment methods are generally biochemical technology, air flotation technology, water aeration, filtration technology, animal and plant ecological treatment technology, artificial wetland technology and so on. The current common engineering methods include: water diversion, circulation filtration, aerated oxygen treatment, chemical dosing, aquatic biological treatment, adding microbial method, HDP direct purification method.
        (1) water diversion law:
        When the water in the suspended matter (such as mud, sand) increased water transparency decreased water quality muddy. Can divert water, the way the water dilution of impurities in the concentration, in order to reduce the concentration of impurities, but the need to replace a lot of water, and water resources in China is quite scarce, is bound to waste valuable water resources.
        (2) loop filter method:
        In the early stages of water feature design, the filter sand and the circulating water pump are designed according to the size of the water body, and the piping for circulation is buried for daily water quality maintenance. If the water area is large, will extend the cycle of the filter cycle, so that water quality can not achieve the desired results. The method of organic matter, algae inhibition and treatment effect is not large, adding chemicals easy to produce secondary pollution of water bodies, the general cycle of filtration technology is only applicable to small water area of ​​the landscape fountain water features.
        (3) aeration oxygen treatment method:
        Aeration is mainly to add oxygen to the water, in order to ensure the life of aquatic life and microbial oxidation of organic matter required for the decomposition of oxygen, while stirring water to achieve the purpose of water circulation, reducing the occurrence of bloom. The main methods of aeration are natural water-fall aeration and mechanical aeration. The former has low oxygen-ejection efficiency, but no energy consumption, simple maintenance and management. The latter is more efficient and flexible, and is widely used in fish ponds Of oxygenation. But the aeration method can only delay the occurrence of eutrophication of water bodies, and can not fundamentally solve the problem of eutrophication of water bodies.
        (4) chemical dosing method:
        By adding water treatment agent - sterilization algicide, kill water in the algae and bacteria, is a temporary solution.
        (5) aquatic biological treatment:
        To ecological principles as a guide, artificial breeding pollution and strong purification of aquatic animals and plants. Such as the use of large-scale aquatic plants to absorb nutrients to control eutrophication; vote to add algae fish; river planted Canna, calamus, water lilies, the use of biological floating bed purification and control of water pollution. This design and operation and maintenance more difficult.
        (6) adding microbial method:
        In the deterioration of landscape water quality, appropriate dosage of appropriate microorganisms (various types of bacteria), to accelerate the decomposition of water pollutants, play a role in water purification. Microbial growth rate is amazing, showing a geometric growth, each breeding are more or less will produce some varieties of variation, resulting in microbial ability to reduce water quality, and difficult to control the number of its growth and affected by the environment, Such as temperature, pressure, and the like. At the same time microbial decomposition products, will cause a large number of algae breeding, once again lead to deterioration of water quality.
        Therefore, microbial treatment of water quality, microbial screening must be carried out regularly, preservation, rejuvenation, and so a series of professional treatment process, and can not guarantee long-term water quality in good condition.
        (7) HDP direct purification method:
        The use of one-flow aeration device, in the closed landscape to create a huge water body of water, and efficient aeration, so that the flow of dead water into living water, to achieve "water does not rot." Day can make the lake water cycle 10 to 20 times, the water cycle times greatly improved. At the same time, in the water body placed a special microbial carrier, the original indigenous microorganisms in the water attached to it, a large number of growth and reproduction, efficient decomposition of water pollutants, enhanced water purification capacity, and can prey decomposition algae, does not produce secondary pollution. Water needs a lot of recycling, running costs are high.
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