SYSTEM AND METHOD FOR RESTORING RIVER AND LAKE WATER BODY BY FLOATING TYPE WATER PURIFICATION PLANT

Abstract

The present invention relates to the field of water environment treatment, and particularly discloses a system and method for restoring a river and lake water body by a floating type water purification plant. The method comprises: (1) under the action of a water pump, enabling the river and lake water body to pass through a grille to be filtered; (2) lifting the filtered water body to an ss sedimentation tank by the water pump through a water inlet pipe, and carrying out pre-magnetization on the water body in the water inlet pipe by a pre-magnetization device arranged in the water inlet pipe; (3) enabling the water body subjected to pre-magnetization treatment to enter the ss sedimentation tank so as to remove particles in the water body; (4) enabling the water body treated by the ss sedimentation tank to enter a magnetizer to be subjected to magnetization treatment under a magnetic field intensity of 50 mT to 2,000 mT; and (5) distributing the water body subjected to magnetization treatment at the upper part of the floating type purification plant. According to the present invention, for the river and lake water body, for different growth periods of aquatic plants, the magnetic field intensity of the magnetizer for carrying out magnetization treatment on the water body is regulated for inducing growth of plants and beneficial indigenous microorganism communities, so that the purifying capacity and reliability of an ecological floating bed technology are reinforced.

Claims

1. A system for restoring a river and lake water body, comprising: a grille to filter large-particle rubbish, plant residues, and large-sized phytoplankton in the river and lake water body; a pre-magnetization device to carry out pre-magnetization on the river and lake water body entering an ss sedimentation tank, wherein the pre-magnetization device is placed in a water inlet pipe of the ss sedimentation tank; the ss sedimentation tank to settle particles in the water body; a water pump that enables the water body to pass to the ss sedimentation tank through the grille; a magnetizer to carry out magnetization treatment on the water body treated by the ss sedimentation tank; and a floating type water purification plant to carry out purification or restoration on a natural water body utilizing the water body treated by the magnetizer.

2. The system according to claim 1, wherein the pre-magnetization device comprises a multi-stage permanent magnetic type magnetization device.

3. A method for restoring a river and lake-water body, comprising: enabling, using a water pump, the river and lake water body to pass through a grille; filtering the water body using the grille; pumping the filtered water body to an ss sedimentation tank by the water pump through a water inlet pipe carrying out pre-magnetization on the filtered water body in the water inlet pipe by a pre-magnetization device placed in the water inlet pipe; enabling the water body subjected to treated in the water inlet by the pre-magnetization device to enter the ss sedimentation tank; removing particles in the water body using the ss sedimentation tank; enabling the water body treated by the ss sedimentation tank to enter a magnetizer; carrying out, by the magnetizer, a magnetization treatment on the water body treated by the ss sedimentation tank, wherein the magnetization treatment is carried out under a magnetic field intensity of 50 mT to 2,000 mT; and distributing the water body treated using the magnetization treatment at an upper part of a floating type water purification plant, wherein aquatic plants are planted in the floating type water purification plant.

4. The method according to claim 3, wherein in a seed germination period, the magnetic field intensity is 50 mT to 100 mT; wherein in a plant growth period, the magnetic field intensity is 100 mT to 1,000 mT; and wherein in a plant decline period, the magnetic field intensity is 500 mT to 2,000 mT.

5. The method according to claim 3, wherein a magnetization time is between 1 min and 30 min.

6. The method according to claim 3, wherein when an ss content of the water body is greater than or equal to 150 mg/m.sup.3, a flocculant is added to carry out flocculating sedimentation.

7. The method according to claim 3, further comprising adding an algicide to remove phytoplankton in the water body wherein when a chlorophyll content of the water body is greater than or equal to 10 mg/m.sup.3.

8. The method according to claim 3, wherein the floating type water purification plant uses an expanded polystyrene as a carrier, wherein the floating type water purification plant uses a PVC pipe as a structural framework of a floating type purification bed, and wherein the floating type water purification plant is subject to gravity type fixing by a concrete cone.

9. The method according to claim 8, wherein the upper part of the floating type water purification plant is an aquatic plant planting area, and wherein a lower part of the floating type water purification plant is a dispersed particle filler area, and wherein the aquatic plants further comprise canna indica, phragmites australis, yellow iris and iris tectorum, and a planting density of the aquatic plants is 1 to 2 Kg/m.sup.2.

10. The method according to claim 9, wherein a filler comprises at least one of a conventional elastic filler or a soft filler.

Description

DETAILED DESCRIPTION

[0031] Preferred embodiments of the present invention will be illustrated in detail below in connection with embodiments. It should be understood that embodiments given below are merely used for illustration, rather than limiting the scope of the present invention. Those of ordinary skill in the art, without departing from the purpose and the spirit of the present invention, can make various modifications and replacements to the present invention.

[0032] Experimental methods used in the below-mentioned embodiments, unless otherwise specifically illustrated, are all conventional methods.

[0033] Materials, reagents and the like used in the below-mentioned embodiments, unless otherwise specifically illustrated, all can be obtained by commercial approaches.

Embodiment 1

[0034] Provided is a system for restoring a river and lake water body by a floating type water purification plant. The system sequentially comprises: a grille, a water pump, a pre-magnetization device, a water inlet pipe, an ss sedimentation tank, a magnetizer, a drainage pipe, a water distributing pipe and a floating type purification plant; wherein:

the grille is used for filtering large-particle rubbish, plant residues and large-sized phytoplankton in the river and lake water body; and the specification of a rake tooth grille gap of the grille is 5 mm to 50 mm, and the grille has an installation angle of 60° to 70°, a maximum water passing flow rate of greater than or equal to 160 m.sup.3/h and a maximum liquid flow rate of greater than or equal to 0.3 m/s.

[0035] The water pump is used for enabling the water body to pass through the grille and lifting the water body passing through the grille to the ss sedimentation tank; the pre-magnetization device is arranged in the water inlet pipe of the ss sedimentation tank, and used for carrying out pre-magnetization on the water body entering the ss sedimentation tank; the pre-magnetization device is a multi-stage permanent magnetic type magnetization device;

the ss sedimentation tank is used for rapidly settling particles in the water body;
the magnetizer is used for carrying out magnetization treatment on the water body treated by the ss sedimentation tank; and
the floating type purification plant utilizes the water body subjected to magnetization treatment by the magnetizer and combines with the plants on the floating type purification plant to carry out purification or restoration on a natural water body.

[0036] The floating type purification plant is a cuboid device, and has a size of 3.0 m*1.5 m, an available water depth of 1.5 m and an effective volume of 6.75 m.sup.3; aquatic plants, including six plants of canna indica, six plants of phragmites australis, six plants of yellow iris and six plants of iris tectorum, are planted at the upper part of the floating type purification plant, and a planting density is 0.5 to 1 Kg/m.sup.2; and the lower part of the floating type purification plant is a dispersed particle filler area.

[0037] In a system of constructing the magnetization floating type purification plant to collaborate to reinforce restoration on the river and lake water body, magnetized water formed by regulating different magnetic field intensities in different growth phases of the aquatic plants uniformly enters the movable type purification plant from the upper part through a water outlet pipe and a water distributing pipeline, and has a water inlet flow rate of 1 m.sup.3/h and hydraulic retention time of 6 h. After being percolated by a floating type purification bed and passing through the bottom dispersed filler area, the magnetized water is discharged out of the floating type purification plant and enters the river and lake natural water body.

[0038] An application method of the system is that:

(1) under the action of the water pump, the river and lake water body passes through the grille to be filtered;
(2) the filtered water body is lifted to the ss sedimentation tank by the water pump through the water inlet pipe, and is subjected to pre-magnetization in the water inlet pipe by the pre-magnetization device arranged in the water inlet pipe;
(3) the water body subjected to pre-magnetization treatment enters the ss sedimentation tank so as to remove particles in the water body;
(4) the water body treated by the ss sedimentation tank enters the magnetizer to be subjected to magnetization treatment under the conditions of a magnetic field intensity of 50 mT to 2,000 mT and magnetization time of 1 min to 30 min; and
(5) the water body subjected to magnetization treatment is distributed at the upper part of the floating type purification plant.

Embodiment 2

[0039] The system and method for restoring the river and lake water body by the floating type water purification plant according to Embodiment 1 are utilized, a floating type purification plant is formed by combination of canna indica, phragmites australis, yellow iris and iris tectorum, and different magnetic field intensities are provided in different growth phases of the canna indica, the phragmites australis, the yellow iris and the iris tectorum, so as to research an induction effect of magnetized water on plant biological hormones in different growth phases of plants.

TABLE-US-00001 TABLE 1 Seed Germination Period Magnetic Field Change Rate Change Rate Plant Name Intensity (mT) (%) of Cytokinin (%) of auxin canna indica, 0 18.7 21.3 phragmites 50 71.2 81.7 australis, 100 77.3 77.8 yellow iris and 300 59.2 61.7 iris tectorum 500 56.2 69.9 800 57.4 66.2 1,000 53.2 67.1

[0040] In the seed germination period, cytokinin (CK), gibberellins (GA), abscisic acid (ABA) and auxin (IAA) have very high positive correlation to germination of seeds, and control germination of seeds. Therefore, in the seed germination period, an optimal germination magnetic field intensity is explored by researching influence of different magnetic field intensities on the biological hormones such as the cytokinin.

[0041] By experiments, it is found that when a magnetic field intensity range is 50 to 100 mT, the biological hormones such as the cytokinin (CK) are effectively induced to be increased, are increased by over 12% compared to other magnetic field intensities, and are increased by over 70% with respect to a case of no magnetic field.

TABLE-US-00002 TABLE 2 Plant Growth Period Change Rate Change Rate Magnetic Field (%) of Fv/Fm (%) of Indoleacetic Plant Name Intensity Value Acid Oxidase canna indica, 0 5.7 0.2 phragmites 50 19.2 3.7 australis, 100 19.3 5.1 yellow iris and 300 21.7 7.4 iris tectorum 500 28.8 12.9 800 33.7 12.1 1,000 32.8 10.7 1,200 27.6 8.7 1,500 18.4 7.2 1,800 19.1 8.7 2,000 17.3 6.7

[0042] In the plant growth period, an optimal magnetic field intensity for promoting plant growth is explored by measuring secretion amounts of chlorophyll fluorescence and indoleacetic acid oxidase of the plants under different magnetic field intensities.

[0043] An experimental result shows that Fv/Fm values of the aquatic plants are all increased to varying degrees under the action of magnetized water of different magnetic fields, and an increase amplitude is 17.3% to 33.7%, wherein the maximum photosynthetic capacities of four kinds of plants all show maximum values in a range of 800 to 1,000 mT, and the final magnetic field intensity should be selected by monitoring photosynthetic activities of four kinds of plants and timely regulating the magnetic field intensity of the magnetized water in two phases of a low temperature and a high temperature so as to determine the optimal magnetic field intensity of a movable type purification plant formed by four kinds of plants. In the magnetic field, secretion of indoleacetic acid oxidase is increased to varying degrees, and is increased by 12.9% under a magnetic field intensity of 500 mT to the greatest degree.

TABLE-US-00003 TABLE 3 Plant Decline Period Change Rate Magnetic Field Change Rate (%) of photosynthetic Plant Name Intensity (%) of SOD activity canna indica, 0 12.1 −18.1 phragmites 800 −33.1 11.2 australis, 1,000 −37.3 13.7 yellow iris and 1,200 −34.4 15.2 iris tectorum 1,500 −47.1 18.8 1,800 −46.2 17.8 2,000 −21.0 8.7

[0044] In the plant decline period, an optimal magnetic field intensity for inhibiting plant decline is explored by measuring the chlorophyll fluorescence and SOD (superoxide dismutase) of the plants under different magnetic field intensities.

[0045] An experimental result shows that the photosynthetic activities of the aquatic plants are all increased to varying degrees in different magnetic fields, and an increase amplitude is 8.7% to 18.8%; and the SOD is reduced to varying degrees, and it illustrates that the magnetic field has a good removal effect on the SOD and can effectively inhibit decline of the plants.

Embodiment 3

[0046] The system and method for restoring the river and lake water body by the floating type water purification plant according to Embodiment 1 are utilized, and induction of restoration of a functional flora by different magnetic field intensities is explored by researching influence of different magnetic field intensities on a microorganism flora structure.

TABLE-US-00004 TABLE 4 Microorganism Detection Indexes Change Rate Change Rate Magnetic Field (%) of Abundance (%) of Abundance Intensity of Nitrifying Bacteria of Ammonifying Bacteria 0 −5.2 1.3 50 11.2 10.2 100 11.4 11.1 300 17.7 15.8 500 24.5 15.9 800 24.1 14.7 1,000 23.3 11.2 1,200 13.4 5.1 1,500 7.1 −1.7 1,800 1.2 −4.7 2,000 −3.7 −13.4

[0047] An experimental result shows that magnetized water which is magnetized under different magnetic field intensities has an obvious induction effect on nitrifying bacteria and ammonifying bacteria, wherein the maximum abundance of the nitrifying bacteria is 500 mT to 800 mT; and the maximum abundance of the nitrifying bacteria appears in a range of 300 mT to 500 mT.

Embodiment 4

[0048] The system and method for restoring the river and lake water body by the floating type water purification plant according to Embodiment 1 are utilized, and performances of a novel floating type purification plant system are explored by researching the optimal magnetic field intensity for inducing plant growth and increasing an abundance of a functional microorganism flora and doing a comparative study with a conventional ecological floating bed.

TABLE-US-00005 TABLE 5 Water Quality Comparison Change Rate Magnetic (%) of Removal Removal Removal Removal Field Trans- Rate (%) Rate (%) Rate (%) Rate (%) Intensity parency of TN of TP of BOD of COD 0 18.2 11.2 5.1 23.7 11.8 100 21.7 23.7 33.3 54.2 43.1 300 28.4 24.7 27.1 56.8 44.8 500 38.7 30.6 24.8 59.7 48.3 800 39.1 29.9 29.3 64.8 50.2 1,000 38.2 28.7 30.1 61.2 48.9

[0049] An experimental result shows that compared to the conventional floating bed, a movable type purification plant subjected to magnetization induction is obviously enhanced in the aspect of the pollutant removal capacity, wherein the highest removal rates of TN, TP, BOD and COD respectively can achieve 30.6%, 33.3%, 64.8% and 50.2%, and are respectively increased by 19.4%, 28.2%, 41.1% and 38.4%.

Embodiment 5

[0050] The system for restoring the river and lake water body by the floating type water purification plant according to Embodiment 1 is utilized, and in order to reflect influence of optimal magnetization solutions in different plant growth phases on river and lake water quality and a microorganism flora, the performance of a novel floating type purification plant system is explored by researching changes of indexes such as transparency, TN, TP, BOD, COD, Ammonifying Bacteria and Nitrifying Bacteria of the water body.

TABLE-US-00006 TABLE 6 Performance Comparison Change Rate Change Rate (%) of (%) of Magnetic Change Rate Removal Removal Removal Removal Abundance of Abundance of Field (%) of Rate (%) Rate (%) Rate (%) Rate (%) Nitrifying Ammonifying Growth Phase Intensity Transparency of TN of TP of BOD of COD Bacteria Bacteria Germination 50 5.7 10.1 13.7 17.2 9.7 10.1 8.9 Period 80 5.8 13.7 17.5 19.4 10.2 10.5 9.7 100 5.7 16.7 19.2 21.2 11.7 10.8 10.5 Growth Period 500 40.3 39.8 32.4 61.2 48.2 23.9 15.1 800 45.2 41.3 33.3 64.7 54.7 26.1 16.2 1,000 42.7 40.1 30.4 63.9 50.1 24.1 14.7 Decline Period 1,500 27.5 16.9 19.7 41.8 34.9 7.6 −2.3 1,650 27.1 20.1 20.1 46.4 37.1 5.1 −4.7 1,800 25.4 17.4 17.8 34.3 30.8 0.2 −15.2

[0051] An experimental result shows that in different phases of plant growth, a pollution removal effect of a movable type purification plant can be obviously improved by regulating the magnetic field intensity of magnetized water so as to promote transparency of the water body, and growth of indigenous functional microorganisms is induced by magnetization so as to reinforce the purifying capacity of the purification plant.

[0052] Although the present invention has been described above in great detail with general descriptions and specific embodiments, on the basis of the present invention, various modifications or improvements may be made, which is apparent to those of ordinary skill in the art. Therefore, all such modifications and improvements without departing from the spirit of the present invention are within the scope of the claims of the present invention.