CN102939806B - Method and system for desalting soil of coastal saline and alkaline land - Google Patents

Method and system for desalting soil of coastal saline and alkaline land Download PDF

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Publication number
CN102939806B
CN102939806B CN201210477260.9A CN201210477260A CN102939806B CN 102939806 B CN102939806 B CN 102939806B CN 201210477260 A CN201210477260 A CN 201210477260A CN 102939806 B CN102939806 B CN 102939806B
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micro
algae
soil
culturing
culturing microalgae
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CN201210477260.9A
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CN102939806A (en
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陈群
刘嘉
李彦
王淑娟
赵博
禚玉群
陈昌和
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清华大学
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management

Abstract

The invention provides a method and a system for desalting soil of coastal saline and alkaline land. The method for desalting the soil of the coastal saline and alkaline land includes the following steps of performing soil excavating and blocking up to the coastal saline and alkaline land to be desalted to form a platform field and bottom land; constructing a microalgae cultivating device in the bottom land and planting salt-tolerant plants on the platform field; subjecting the platform field to salt leaching by using underground salt water or natural rainfall to obtain salt-leached drained water with the salt content of 0.3-10 wt.%; and leading the salt-leached drained water in the microalgae cultivating device for microalgae cultivation. By means of the method and the system, the soil of the coastal saline and alkaline land can be effectively desalted, and simultaneously, the salt-leached drained water can be effectively used for cultivating microalgae.

Description

The soil of beach saline land is carried out to the method and system of desalination
Technical field
The present invention relates to the soil of beach saline land to carry out the method and system of desalination.
Background technology
More than 18000 kilometer of China's seashore line length.Mostly coastal saline-alkali area is to move back the ground in sea, and its soil major part is coastal saline-alkali soil, is development directly occurs on beach salt marsh mud.This class saline land quality is sticky heavy, and not only upper soll layer salification weight, and heart subsoil salt content is also very high, close with original salt marsh mud.Meanwhile, because coastal region bury of groundwater is shallow and phreatic water is salt water, high salinity underground water is accumulated in upper layer of soil with strong native face evaporation, and soil salt content is many between 0.4-3%, even reaches as high as 3-4%.The another one feature of coastal saline-alkali soil, that soil and groundwater chemical components of salt is consistent with seawater, sodium chloride salt has comparative advantage, soil sodium adsorption ratio is very high, add and be formed at salt marsh mud, cause that the soil texture is sticky heavy, structure is poor, gas permeability is bad, except the extremely strong minority halophytes of salt resistance, common crops, lawn, flowers, tree and shrubs etc. all can not be grown.
Transformation salinity ground also improves the agricultural production amount of Saline, it is one of vital task of China's agricultural development, and the salt discharge of at present relevant alkaline land soil research, particularly for the research overwhelming majority of coastal region saline land topsoil quick desalination also in engineering measure salt discharges such as " hidden pipe salt discharge ", " underground blocking-up salt discharge ", " fresh water pressure salt " and use the chemical salt discharges such as soil conditioner, it is not too practical that these measures lack fresh water area to coastal saline-alkali.
Yet the method for at present coastal region being carried out to alkaline land improving still haves much room for improvement.
Summary of the invention
The present invention one of is intended to solve the problems of the technologies described above at least to a certain extent or at least provides a kind of useful business to select.For this reason, one object of the present invention is to propose a kind of method that can effectively transform beach saline land that has.
In a first aspect of the present invention, the present invention proposes a kind of method of the soil of beach saline land being carried out to desalination.The method of according to an embodiment of the invention, the soil of beach saline land being carried out to desalination comprises the following steps: at the beach saline land for the treatment of desalination cut the earth padded formation raised fields and low-lying land; In described low-lying land, build both culturing microalgae equipment, on described raised fields, plant salt-tolerant plant; Utilize saline groundwater or natural precipitation to carry out the desalinization of soil by flooding or leaching to described raised fields, and obtain draining after the desalinization of soil by flooding or leaching, after the wherein said desalinization of soil by flooding or leaching, the salt content of draining is 0.3 ~ 10 % by weight; And draining after the described desalinization of soil by flooding or leaching is incorporated in described both culturing microalgae equipment and carries out both culturing microalgae.Method, can carry out desalination to the soil of beach saline land effectively according to an embodiment of the invention, meanwhile, can also effectively utilize the desalinization of soil by flooding or leaching after draining carry out cultivating microalgae.
According to embodiments of the invention, said method can also have following additional technical feature:
In one embodiment of the invention, described salt-tolerant plant be selected from Bi Shi salicornia europaeal, Tamarix hispida, arrow-leaved oleaster, Chinese wax, salix monogolica, yellow horn, Hibiscus hamabo, Vitex rotundifolia and Chinese small iris one of at least.Thus, can further improve the effect of desalination, and can effectively conserve water and soil and effectively obtain salt-tolerant plant.
In one embodiment of the invention, described raised fields is 1 meter, plane above Ground, and wide is 5 ~ 20 meters, and length is 60 ~ 200 meters, and area is 300 ~ 4000m 2, described low-lying land is lower than 1 ~ 1.5 meter of ground level.Thus, can further improve the efficiency of carrying out Soil Desalting.
In one embodiment of the invention, form a plurality of raised fields, the spacing of wherein said raised fields is 5 ~ 20 meters.Thus, can further improve the efficiency of carrying out Soil Desalting.
In one embodiment of the invention, it is characterized in that, described both culturing microalgae equipment further comprises: micro-algae culture pond, is formed with micro algae growth space in described micro-algae culture pond; Micro algae culturing liquid, described micro algae culturing liquid is arranged in described micro algae growth space, and the water of described micro algae culturing liquid is draining after the saline land desalinization of soil by flooding or leaching of salt content 0.3 ~ 10 % by weight; And liquid stream drive unit, described liquid stream drive unit is arranged in described micro algae growth space and for driving the motion of described micro algae culturing liquid.Thus, can realize under the driving of liquid stream drive unit, the micro algae culturing liquid holding in micro algae growth space fully mixes, and can, so that micro algae culturing liquid circulates along raceway pond, strengthen gas-liquid and liquid-solid transmission.Thereby, further improved and utilized the efficiency of carrying out both culturing microalgae according to the both culturing microalgae equipment of the embodiment of the present invention.In addition, can utilize useless ground, turn waste into wealth, not occupy cultivated land, and can make full use of the abundant wind energy of coastal region and solar energy.Thereby, further improved and utilized the efficiency of carrying out both culturing microalgae according to the both culturing microalgae equipment of the embodiment of the present invention.
In one embodiment of the invention, described both culturing microalgae equipment further comprises top cover, and described top cover is arranged at described micro-algae culture pond top, for sealing described micro-algae culture pond.Thus, can seal in the winter time the micro-algae of heat insulating culture.
In one embodiment of the invention, further comprise TRT is set, described TRT is connected with described liquid stream drive unit, and for driving described liquid stream drive unit, wherein, described TRT is wind-light complementing power generation device.Thus, can utilize fully the abundant wind energy of coastal region and solar energy, for liquid stream drive unit provides energy source.
In one embodiment of the invention, further comprise: utilize biomass pyrolysis device, described salt-tolerant plant is carried out to pyrolysis to produce carbonic acid gas; And resulting carbonic acid gas is supplied in described both culturing microalgae equipment.For example, may further include biomass pyrolysis device is set, described biomass pyrolysis device is connected with described micro-algae culture pond, for providing carbon source to described micro algae growth space.Thus, can make full use of the living beings that grow after beach saline land improvement is raw material, produces carbonated flue gas, for micro-algae culture pond provides micro algae growth required carbon source, and provides thermal source for micro-algae culture pond is incubated in the winter time.
In one embodiment of the invention, described micro-algae be selected from spirulina, Dunaliella salina, the little Du Shi algae of pale red and green Du Shi algae one of at least.Inventor is surprised to find, this slightly algae can effectively after the saline land desalinization of soil by flooding or leaching of salt content 0.3 ~ 10 % by weight, in draining, grow.Thereby, further improved and utilized the efficiency of carrying out both culturing microalgae according to the both culturing microalgae equipment of the embodiment of the present invention.
In a second aspect of the present invention, the present invention proposes a kind of system of the soil of beach saline land being carried out to desalination.According to embodiments of the invention, this system comprises: raised fields, and described raised fields is in the padded formation of cutting the earth of the beach saline land for the treatment of desalination; Both culturing microalgae equipment, described both culturing microalgae equipment is formed at builds the formed low-lying land of described raised fields, and described both culturing microalgae equipment further comprises: micro-algae culture pond, is formed with micro algae growth space in described micro-algae culture pond; Micro algae culturing liquid, described micro algae culturing liquid is arranged in described micro algae growth space, and the water of described micro algae culturing liquid is draining after the saline land desalinization of soil by flooding or leaching of salt content 0.3 ~ 10 % by weight; And liquid stream drive unit, described liquid stream drive unit is arranged in described micro algae growth space and for driving the motion of described micro algae culturing liquid.Utilize this system, can effectively implement foregoing method of the soil of beach saline land being carried out to desalination, can effectively to the soil of beach saline land, carry out desalination, meanwhile, can also effectively utilize the desalinization of soil by flooding or leaching after draining carry out cultivating microalgae.
According to embodiments of the invention, this system can also have following additional technical feature:
In one embodiment of the invention, both culturing microalgae equipment further comprises TRT, and described TRT is connected with described liquid stream drive unit, and for driving described liquid stream drive unit, wherein, described TRT is wind-light complementing power generation device.Thus, can utilize fully the abundant wind energy of coastal region and solar energy, for liquid stream drive unit provides energy source.
In one embodiment of the invention, both culturing microalgae equipment further comprises biomass pyrolysis device, and described biomass pyrolysis device is connected with described micro-algae culture pond, for providing carbon source to described micro algae growth space.Thus, can make full use of the living beings that grow after beach saline land improvement is raw material, produces carbonated flue gas, for micro-algae culture pond provides micro algae growth required carbon source, and provides thermal source for micro-algae culture pond is incubated in the winter time.
In one embodiment of the invention, described micro-algae be selected from spirulina, Dunaliella salina, the little Du Shi algae of pale red and green Du Shi algae one of at least.Inventor is surprised to find, this slightly algae can effectively after the saline land desalinization of soil by flooding or leaching of salt content 0.3 ~ 10 % by weight, in draining, grow.Thereby, further improved and utilized the efficiency of carrying out both culturing microalgae according to the both culturing microalgae equipment of the embodiment of the present invention.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 has shown the structural representation of both culturing microalgae equipment according to an embodiment of the invention;
Fig. 2 has shown the schematic diagram of beach saline land raised fields desalinization of soil by flooding or leaching improving technology according to an embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
In description of the invention, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as limitation of the present invention.
In the present invention, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but contact by the other feature between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under Second Characteristic and tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
In a first aspect of the present invention, the present invention proposes a kind of method of the soil of beach saline land being carried out to desalination.The method of according to an embodiment of the invention, the soil of beach saline land being carried out to desalination comprises the following steps:
First, at the beach saline land for the treatment of desalination cut the earth padded formation raised fields and low-lying land.According to one embodiment of present invention, raised fields is 1 meter, plane above Ground, and wide is 5 ~ 20 meters, and length is 60 ~ 200 meters, and the area of raised fields is 300 ~ 4000m 2, low-lying land is lower than 1 ~ 1.5 meter of ground level.Thus, can further improve the efficiency of carrying out Soil Desalting.In one embodiment of the invention, can form a plurality of raised fields, wherein the spacing of raised fields is 5 ~ 20 meters.Thus, can further improve the efficiency of carrying out Soil Desalting.
Next, in low-lying land, build both culturing microalgae equipment, on raised fields, plant salt-tolerant plant.In one embodiment of the invention, described salt-tolerant plant be selected from Bi Shi salicornia europaeal, Tamarix hispida, arrow-leaved oleaster, Chinese wax, salix monogolica, yellow horn, Hibiscus hamabo, Vitex rotundifolia and Chinese small iris one of at least.Thus, can further improve the effect of desalination, and can effectively conserve water and soil and effectively obtain salt-tolerant plant.
Then, utilize saline groundwater or natural precipitation to carry out the desalinization of soil by flooding or leaching to raised fields, and obtain draining after the desalinization of soil by flooding or leaching, wherein after the desalinization of soil by flooding or leaching, the salt content of draining is 0.3 ~ 10 % by weight.
Finally, draining after the desalinization of soil by flooding or leaching is incorporated into and in both culturing microalgae equipment, carries out both culturing microalgae.Method, can carry out desalination to the soil of beach saline land effectively according to an embodiment of the invention, meanwhile, can also effectively utilize the desalinization of soil by flooding or leaching after draining carry out cultivating microalgae.
According to embodiments of the invention, can further include and utilize biomass pyrolysis device, salt-tolerant plant is carried out to pyrolysis to produce carbonic acid gas; And resulting carbonic acid gas is supplied in described both culturing microalgae equipment.
With reference to figure 1, according to embodiments of the invention, can comprise for both culturing microalgae equipment of the present invention: micro-algae culture pond 100, micro algae culturing liquid (not shown) and liquid stream drive unit 2.According to embodiments of the invention, in micro-algae culture pond 100, be formed with micro algae growth space 1, micro algae culturing liquid is arranged in micro algae growth space 1, and liquid stream drive unit 2 is arranged in micro algae growth space 1 and for driving the motion of micro algae culturing liquid.Thus, can realize under the driving of liquid stream drive unit, the micro algae culturing liquid holding in micro algae growth space fully mixes, thereby be convenient to micro-algae, in micro algae culturing liquid, grows, and realizes cultivating microalgae effectively.
According to embodiments of the invention, the form in micro algae growth space 1 is also not particularly limited.With reference to figure 1, according to one embodiment of present invention, micro algae growth space 1 is the form of raceway pond ringwise.Thus, can realize under the driving of liquid stream drive unit 2, the micro algae culturing liquid holding in micro algae growth space 1 fully mixes, and can, so that micro algae culturing liquid circulates along raceway pond, strengthen gas-liquid and liquid-solid transmission.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.
According to one embodiment of present invention, micro-algae culture pond 100 utilizes beach saline land to improve formed low-lying land formation.Thus, can utilize useless ground, turn waste into wealth, not occupy cultivated land, and can make full use of the abundant wind energy of coastal region and solar energy.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.In addition, when utilizing beach saline land to improve formed low-lying land formation micro-algae culture pond 100, can be easily by arranging along its length in the middle of micro-algae culture pond 100, cut off 110 micro-algae culture pond 100 is separated, thereby form the micro algae growth space 1 of ring-like raceway pond form.According to one embodiment of present invention, at the bottom of the pond of micro-algae culture pond, lower than 1 ~ 1.5 meter of ground level, the degree of depth of micro algae culturing liquid is 30 ~ 50 centimetres.Thus, can utilize easily existing beach saline land to improve formed low-lying land and form micro-algae culture pond, thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.According to one embodiment of present invention, further comprise top cover, described top cover is arranged at described micro-algae culture pond top, for sealing described micro-algae culture pond.Thus, can seal in the winter time the micro-algae of heat insulating culture.
According to one embodiment of present invention, the water of micro algae culturing liquid is draining after the saline land desalinization of soil by flooding or leaching of salt content 0.3 ~ 10 % by weight.Inventor is surprised to find, and after the saline land desalinization of soil by flooding or leaching of employing salt content 0.3 ~ 10 % by weight, draining can be effectively for cultivating micro-algae, especially from spirulina, Dunaliella salina, the little Du Shi algae of pale red and green Du Shi algae.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.About the alkaline land improving desalinization of soil by flooding or leaching, after in beach saline land raised fields desalinization of soil by flooding or leaching improving technology, will be described in detail.
According to one embodiment of present invention, can may further include water supply installation (not shown) for both culturing microalgae equipment of the present invention, this water supply installation is connected with micro-algae culture pond 100, for 1 water supply to micro algae growth space.Thus, can be continuously to draining after the desalinization of soil by flooding or leaching of saline land is provided in micro algae growth space.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.
According to embodiments of the invention, the type of the liquid stream drive unit adopting in can be for both culturing microalgae equipment of the present invention is also not particularly limited, and it can be paddle board wheel that direct current generator drives.For example, can, by paddle board wheel carrier in the top of micro-algae culture pond runway, at both sides runway, respectively set up a paddle board wheel, liquid in culturing pool is axially fully mixed, to guarantee that the micro-algae in liquid is subject to light sufficient, and liquid in pond is flowed along raceway pond, strengthen gas-liquid and liquid-solid transmission.
According to embodiments of the invention, this can also have some auxiliary equipment for both culturing microalgae equipment of the present invention can be for the efficiency of both culturing microalgae equipment cultivating microalgae of the present invention for further improving utilization.According to one embodiment of present invention, can may further include TRT 3 for both culturing microalgae equipment of the present invention, this TRT 3 is connected with liquid stream drive unit 2, for driving liquid stream drive unit 2, wherein, TRT 3 is wind-light complementing power generation device.According to embodiments of the invention, the generated output of this wind-light complementing power generation device can be 100 ~ 1000W.Thus, can utilize fully the abundant wind energy of coastal region and solar energy, for liquid stream drive unit provides energy source.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.According to one embodiment of present invention, can may further include biomass pyrolysis device 4 for both culturing microalgae equipment of the present invention, this biomass pyrolysis device 4 is connected with micro-algae culture pond 100, for providing carbon source to micro algae growth space 1.Thus, can make full use of the living beings that grow after beach saline land improvement is raw material, produces carbonated flue gas, for micro-algae culture pond provides micro algae growth required carbon source, and provides thermal source for micro-algae culture pond is incubated in the winter time.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.According to one embodiment of present invention, can utilize according to micro-algae that can cultivate for both culturing microalgae equipment of the present invention of the embodiment of the present invention be selected from spirulina, Dunaliella salina, the little Du Shi algae of pale red and green Du Shi algae one of at least.Inventor is surprised to find, this slightly algae can effectively after the saline land desalinization of soil by flooding or leaching of salt content 0.3 ~ 10 % by weight, in draining, grow.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.
In a second aspect of the present invention, the present invention proposes a kind of system of the soil of beach saline land being carried out to desalination.According to embodiments of the invention, this system comprises: raised fields 200 and both culturing microalgae equipment 1000.According to embodiments of the invention, raised fields 200 is in the padded formation of cutting the earth of the beach saline land for the treatment of desalination, and both culturing microalgae equipment 1000 is formed at builds the formed low-lying land of raised fields 200.With reference to figure 1, according to embodiments of the invention, can comprise for both culturing microalgae equipment of the present invention: micro-algae culture pond 100, micro algae culturing liquid (not shown) and liquid stream drive unit 2.According to embodiments of the invention, in micro-algae culture pond 100, be formed with micro algae growth space 1, micro algae culturing liquid is arranged in micro algae growth space 1, and liquid stream drive unit 2 is arranged in micro algae growth space 1 and for driving the motion of micro algae culturing liquid.Thus, can realize under the driving of liquid stream drive unit, the micro algae culturing liquid holding in micro algae growth space fully mixes, thereby be convenient to micro-algae, in micro algae culturing liquid, grows, and realizes cultivating microalgae effectively.Thus, utilize this system, can effectively implement foregoing method of the soil of beach saline land being carried out to desalination, can effectively to the soil of beach saline land, carry out desalination, meanwhile, can also effectively utilize the desalinization of soil by flooding or leaching after draining carry out cultivating microalgae.
According to embodiments of the invention, the form in micro algae growth space 1 is also not particularly limited.With reference to figure 1, according to one embodiment of present invention, micro algae growth space 1 is the form of raceway pond ringwise.Thus, can realize under the driving of liquid stream drive unit 2, the micro algae culturing liquid holding in micro algae growth space 1 fully mixes, and can, so that micro algae culturing liquid circulates along raceway pond, strengthen gas-liquid and liquid-solid transmission.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.According to one embodiment of present invention, micro-algae culture pond 100 utilizes beach saline land to improve formed low-lying land formation.Thus, can utilize useless ground, turn waste into wealth, not occupy cultivated land, and can make full use of the abundant wind energy of coastal region and solar energy.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.In addition, when utilizing beach saline land to improve formed low-lying land formation micro-algae culture pond 100, can be easily by arranging along its length in the middle of micro-algae culture pond 100, cut off 110 micro-algae culture pond 100 is separated, thereby form the micro algae growth space 1 of ring-like raceway pond form.According to one embodiment of present invention, at the bottom of the pond of micro-algae culture pond, lower than 1 ~ 1.5 meter of ground level, the degree of depth of micro algae culturing liquid is 30 ~ 50 centimetres.Thus, can utilize easily existing beach saline land to improve formed low-lying land and form micro-algae culture pond, thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.According to one embodiment of present invention, further comprise top cover, described top cover is arranged at described micro-algae culture pond top, for sealing described micro-algae culture pond.Thus, can seal in the winter time the micro-algae of heat insulating culture.According to one embodiment of present invention, the water of micro algae culturing liquid is draining after the saline land desalinization of soil by flooding or leaching of salt content 0.3 ~ 10 % by weight.Inventor is surprised to find, and after the saline land desalinization of soil by flooding or leaching of employing salt content 0.3 ~ 10 % by weight, draining can be effectively for cultivating micro-algae, especially from spirulina, Dunaliella salina, the little Du Shi algae of pale red and green Du Shi algae.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.About the alkaline land improving desalinization of soil by flooding or leaching, after at beach saline land raised fields desalinization of soil by flooding or leaching improving technology, will be described in detail.According to one embodiment of present invention, can may further include water supply installation (not shown) for both culturing microalgae equipment of the present invention, this water supply installation is connected with micro-algae culture pond 100, for 1 water supply to micro algae growth space.Thus, can be continuously to draining after the desalinization of soil by flooding or leaching of saline land is provided in micro algae growth space.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.According to embodiments of the invention, the type of the liquid stream drive unit adopting in can be for both culturing microalgae equipment of the present invention is also not particularly limited, and it can be paddle board wheel that direct current generator drives.For example, can, by paddle board wheel carrier in the top of micro-algae culture pond runway, at both sides runway, respectively set up a paddle board wheel, liquid in culturing pool is axially fully mixed, to guarantee that the micro-algae in liquid is subject to light sufficient, and liquid in pond is flowed along raceway pond, strengthen gas-liquid and liquid-solid transmission.According to embodiments of the invention, this can also have some auxiliary equipment for both culturing microalgae equipment of the present invention can be for the efficiency of both culturing microalgae equipment cultivating microalgae of the present invention for further improving utilization.According to one embodiment of present invention, can may further include TRT 3 for both culturing microalgae equipment of the present invention, this TRT 3 is connected with liquid stream drive unit 2, for driving liquid stream drive unit 2, wherein, TRT 3 is wind-light complementing power generation device.According to embodiments of the invention, the generated output of this wind-light complementing power generation device can be 100 ~ 1000W.Thus, can utilize fully the abundant wind energy of coastal region and solar energy, for liquid stream drive unit provides energy source.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.According to one embodiment of present invention, can may further include biomass pyrolysis device 4 for both culturing microalgae equipment of the present invention, this biomass pyrolysis device 4 is connected with micro-algae culture pond 100, for providing carbon source to micro algae growth space 1.Thus, can make full use of the living beings that grow after beach saline land improvement is raw material, produces carbonated flue gas, for micro-algae culture pond provides micro algae growth required carbon source, and provides thermal source for micro-algae culture pond is incubated in the winter time.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.According to one embodiment of present invention, can utilize according to micro-algae that can cultivate for both culturing microalgae equipment of the present invention of the embodiment of the present invention be selected from spirulina, Dunaliella salina, the little Du Shi algae of pale red and green Du Shi algae one of at least.Inventor is surprised to find, this slightly algae can effectively after the saline land desalinization of soil by flooding or leaching of salt content 0.3 ~ 10 % by weight, in draining, grow.Thereby, further improved to utilize and can carry out for both culturing microalgae equipment of the present invention the efficiency of both culturing microalgae according to the embodiment of the present invention.
Before it will be appreciated by those skilled in the art that, for the described feature and advantage of method of the soil of beach saline land being carried out to desalination, be applicable to natch the soil of beach saline land to carry out the system of desalination, do not repeat them here.
In the description of this specification, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, those of ordinary skill in the art can change above-described embodiment within the scope of the invention in the situation that not departing from principle of the present invention and aim, modification, replacement and modification.

Claims (7)

1. the soil of beach saline land is carried out to a method for desalination, it is characterized in that, comprise the following steps:
At the beach saline land for the treatment of desalination cut the earth padded formation raised fields and low-lying land;
In described low-lying land, build both culturing microalgae equipment, on described raised fields, plant salt-tolerant plant;
Utilize saline groundwater or natural precipitation to carry out the desalinization of soil by flooding or leaching to described raised fields, and obtain draining after the desalinization of soil by flooding or leaching, after the wherein said desalinization of soil by flooding or leaching, the salt content of draining is 0.3~10 % by weight; And
Draining after the described desalinization of soil by flooding or leaching is incorporated in described both culturing microalgae equipment and carries out both culturing microalgae,
Wherein, further comprise:
Utilize biomass pyrolysis device, described salt-tolerant plant is carried out to pyrolysis to produce carbonic acid gas; And
Resulting carbonic acid gas is supplied in described both culturing microalgae equipment.
2. method according to claim 1, it is characterized in that, described salt-tolerant plant be selected from Bi Shi salicornia europaeal, Tamarix hispida, arrow-leaved oleaster, Chinese wax, salix monogolica, yellow horn, Hibiscus hamabo, Vitex rotundifolia and Chinese small iris one of at least, described micro-algae be selected from spirulina, Dunaliella salina, the little Du Shi algae of pale red and green Du Shi algae one of at least.
3. method according to claim 1, is characterized in that, described raised fields is 1 meter, plane above Ground, and wide is 5~20 meters, and length is 60~200 meters, and area is 300~4000m 2, described low-lying land is lower than 1~1.5 meter of ground level.
4. method according to claim 3, is characterized in that, forms a plurality of raised fields, and the spacing of wherein said raised fields is 5~20 meters.
5. the soil of beach saline land is carried out to a system for desalination, it is characterized in that, comprising:
Raised fields, described raised fields is in the padded formation of cutting the earth of the beach saline land for the treatment of desalination;
Both culturing microalgae equipment, described both culturing microalgae equipment is formed at builds the formed low-lying land of described raised fields, and described both culturing microalgae equipment further comprises:
Micro-algae culture pond, is formed with micro algae growth space in described micro-algae culture pond;
Micro algae culturing liquid, described micro algae culturing liquid is arranged in described micro algae growth space, and the water of described micro algae culturing liquid is draining after the saline land desalinization of soil by flooding or leaching of salt content 0.3~10 % by weight; And
Liquid stream drive unit, described liquid stream drive unit is arranged in described micro algae growth space and for driving the motion of described micro algae culturing liquid,
Described both culturing microalgae equipment further comprises biomass pyrolysis device, and described biomass pyrolysis device is connected with described micro-algae culture pond, for providing carbon source to described micro algae growth space.
6. system according to claim 5, is characterized in that, described both culturing microalgae equipment further comprises TRT, and described TRT is connected with described liquid stream drive unit, for driving described liquid stream drive unit,
Wherein,
Described TRT is wind-light complementing power generation device.
7. system according to claim 5, is characterized in that, described micro-algae be selected from spirulina, Dunaliella salina, the little Du Shi algae of pale red and green Du Shi algae one of at least.
CN201210477260.9A 2012-11-21 2012-11-21 Method and system for desalting soil of coastal saline and alkaline land CN102939806B (en)

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