Method and device for purifying water body with heavy-metal pollution
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A technology for purifying water and heavy metals, applied in water pollutants, chemical instruments and methods, biological water/sewage treatment, etc. It can solve the problems of long ecological restoration system cycle, lack of universality, and inability to purify water heavy metal pollution in a timely manner. , to achieve the effect of purifying water heavy metal pollution, high removal rate and high coverage rate
Inactive Publication Date: 2013-09-18
ZHEJIANG UNIV
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Biological treatment is effective, cheap, and easy to implement, but it lacks the universality of wide application, and it t
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[0037] Example 1:
[0038] The present invention will be further described below in conjunction with the drawings.
[0039] Such as figure 1 As shown, this embodiment discloses a device for purifying heavy metal pollution in water. The device is composed of a housing 3, a column of Scenedesmus tetracystis located inside the housing 3, and a blower 10 for ventilation and oxygen supply.
[0040] Among them, the shell 3 is 35cm high and has a volume of 990ml; there are 7 layers of carbon fiber filter 8 on the Scenedesmus tetracervus column with a distance of 3.5 to 4.0 cm. Each layer of the multilayer carbon fiber filter 8 has four For Scenedesmus cerevisiae biofilm, a sieve plate 9 is arranged under the multi-layer carbon fiber filter screen 8.
[0041] The housing 3 is provided with a water inlet and three water outlets. The three water outlets are respectively the upper water port 5, the middle water port 6 and the lower water port 7. The three water outlets are equipped with valves; ...
Example Embodiment
[0049] Example 2
[0050] The culture temperature of Scenedesmus tetracera in Example 1 was adjusted to 25°C, and the same experiment as in Example 1 was performed. The specific sampling time is as follows Figure 7-11 Shown.
[0051] From Figure 7-11 It can be seen that under the condition of 25°C and the light-to-dark ratio of 12h:12h, the removal rate of 5mg / L copper, cadmium, lead, and zinc is 91%, 90%, 63%, 50% by using the method and device of this embodiment. %, see sampling time and adsorption results Figure 7-11 . The basic equilibrium time of heavy metal adsorption of copper, cadmium, lead, and zinc is 5h, 21h, 21h, 21h, and the removal rate is 91%, 90%, 63%, 50%.
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Abstract
The invention discloses a method for purifying a water body with heavy-metal pollution. The method comprises the following steps of: (1) putting scenedesmus quaclricauda in culture solution, placing a film-hanging carrier in the culture solutin, culturing under the conditions that the temperature is 20-25 DEG C and the light and dark ratio is 12h:12h, and forming a biological film of the scenedesmus quaclricauda which covers the film-hanging carrier basically and completely; and (2) contacting wastewater containing heavy metals and the biological film of the scenedesmus quaclricauda and fully reacting. The invention also discloses a device for purifying the water body with heavy-metal pollution. The device comprises a shell, scenedesmus quaclricauda columns positioned in the shell, and oxygen supplying equipment for supplying oxygen to the scenedesmus quaclricauda columns. The method and the device disclosed by the invention have the advantages that the biological film is obtained by the scenedesmus quaclricauda with easily-obtained algae seeds, the biological film of the scenedesmus quaclricauda is utilized for carrying out adsorption treatment on the wastewater containing the heavy metals, the specific surface area of the biological film is large, the absorption rate to the heavy metals is high, and the water body with heavy-metal pollution can be effectively purified.
Description
technical field [0001] The invention relates to the technical field of heavy metal removal, in particular to a method and device for purifying heavy metal pollution in water. Background technique [0002] Heavy metal pollution in water has always been one of the main water environmental problems to be solved urgently, and its toxicity and mobility in the environment have also increased the difficulty of purifying heavy metals in water. At the same time, because heavy metals are not degradable, they can be enriched in water animals and plants, and endanger human health through food chains and other channels. How to effectively control heavy metal pollution in water has become an urgent water treatment issue. [0003] The technologies currently used to purify heavy metal pollution in water mainly include physical, chemical and biological treatment methods. [0004] Physical and chemical treatment mainly include coagulation-flocculation method, activated carbon adsorption proc...
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