CN107906462B - Method and device for promoting growth of submerged plants in polluted low-transparency water body - Google Patents

Method and device for promoting growth of submerged plants in polluted low-transparency water body Download PDF

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Publication number
CN107906462B
CN107906462B CN201710960214.7A CN201710960214A CN107906462B CN 107906462 B CN107906462 B CN 107906462B CN 201710960214 A CN201710960214 A CN 201710960214A CN 107906462 B CN107906462 B CN 107906462B
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water body
submerged
lighting device
light
growth
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CN107906462A (en
Inventor
陈雪初
龙腾
孙彦伟
戴雅奇
杨华蕾
彭琳
夏菁
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Shanghai Construction Land And Land Consolidation Business Center
East China Normal University
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Shanghai Construction Land And Land Consolidation Business Center
East China Normal University
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S11/00—Non-electric lighting devices or systems using daylight
    • F21S11/002—Non-electric lighting devices or systems using daylight characterised by the means for collecting or concentrating the sunlight, e.g. parabolic reflectors or Fresnel lenses
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
    • C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
    • Y02P60/12—Technologies relating to agriculture, livestock or agroalimentary industries using renewable energies, e.g. solar water pumping

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Biotechnology (AREA)
  • Botany (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Microbiology (AREA)
  • Sustainable Development (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Cultivation Of Plants (AREA)
  • Hydroponics (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention discloses a method for accelerating the growth of submerged plants in a polluted low-transparency water body. The light guide technology is used for supplying and adjusting the illumination intensity in the low-transparency water body to enhance the photosynthesis of the submerged plant, so that the growth of the submerged plant is promoted. The method specifically comprises the steps that sunlight is collected by a specially-made lighting device, transmitted to the water through a light guide pipe and uniformly scattered by a diffuse reflection device, so that the requirement of underwater submerged plants on the sunlight is met, the physiological requirement of photosynthesis is maintained, the limiting effect of low transparency in a polluted water body on the recovery and growth of the submerged plants is solved, and the purification capacity of the submerged plants is promoted to be exerted.

Description

Method and device for promoting growth of submerged plants in polluted low-transparency water body
Technical Field
The invention belongs to the field of environmental ecological engineering, and particularly relates to a method and a device for accelerating the growth of submerged plants in a polluted low-transparency water body.
Background
Since the industrial revolution, the environment has been becoming more and more severe. The problems of black and odorous river channels caused by domestic sewage, domestic garbage and industrial wastewater and eutrophication of water bodies cause the recession and disappearance of aquatic plants, particularly submerged plants.
The problem of polluted water body restoration is imminent. At present, the treatment modes mainly comprise: physical remediation, chemical remediation and biological ecological remediation. The physical remediation method mainly means that pollutants in water are removed through measures of dredging, water diversion, mechanical algae removal and the like. However, the method needs a large amount of manpower and physics, is high in cost, can only temporarily solve the problem of river pollution, and cannot fundamentally solve the problem of river pollution. The chemical remediation method utilizes the chemical and physicochemical actions of chemical agents to convert contaminants into another phase. However, the method does not fundamentally eliminate pollutants, and the added medicament is easy to cause secondary pollution to the water body. The bioremediation mode characterized by environmental friendliness and ecological energy conservation is a measure for realizing water environment purification and ecological effect recovery by utilizing specific organisms (plants, microorganisms or protozoa) to absorb, convert, eliminate or degrade water environment pollutants. Is highly favored. The recovery and reproduction of aquatic plants as an effective low-investment high-return treatment mode become the key of the polluted water eutrophication treatment.
The illumination is a limiting factor for the growth of submerged plants and determines the photosynthesis and distribution of submerged plants under water. The extinction effect of the polluted low-transparency water body inhibits the biomass and the density of the submerged plants. The importance of illumination to the growth of aquatic plants is self-evident, and submerged plants can be promoted to grow rapidly only under the conditions of sufficient illumination, temperature and nutrient substances. However, the polluted low-transparency water body such as a black and odorous riverway has poor water quality condition and deficient illumination condition, influences the absorption and utilization of submerged plants to light and is not beneficial to the growth of aquatic plants, thereby failing to achieve the aim of treating and purifying water quality. Therefore, the difficulty of how to supply illumination to the polluted water body with low transparency becomes the growth of the submerged plants.
Disclosure of Invention
The invention aims to design a method for accelerating the growth of submerged plants in a low-polluted low-transparency water body by a special light guide pipe lighting device, which is to transmit the light above the water body to the dark water body in a river channel to supply sufficient lighting conditions for the submerged plants, so that the submerged plants are propagated in the water body with sufficient lighting. Therefore, the sunlight transmitted to the water body not only provides illumination conditions for photosynthesis of the aquatic plants, but also enables the water body to store heat energy to improve the water temperature. The supplied illumination and temperature, and the original nutrient substances ensure the normal photosynthesis of the aquatic plants.
In order to achieve the above object, the present invention provides a lighting device for accelerating the growth of submerged plants in a low transparency water body, comprising: the light guide pipe is penetratingly arranged on the floating plate, a light-collecting cover is arranged at the top end of the light guide pipe, and a diffuser is arranged at the bottom end of the light guide pipe; the floating plate is a flat plate with the density smaller than that of the water body, and the bottom of the floating plate is connected with at least one sinker with the density larger than that of the water body.
In the lighting device provided by the invention, the lighting cover is hemispherical, has the diameter of 30-80cm and is made of optical-grade PC materials.
In the lighting device provided by the invention, the light guide pipe is of a cylindrical structure, the depth of water entry can be adjusted, the diameter is 30-80cm, and the height is 50-150 cm.
The lighting device provided by the invention further comprises an illuminometer arranged beside the light guide pipe.
In the lighting device provided by the invention, the illuminometer comprises a digital display and a probe; the digital display is fixed on the floating plate, the probe is positioned at the top of the underwater submerged plant, the digital display is used for displaying the underwater illumination intensity detected by the probe, and the underwater depth of the light guide pipe can be adjusted, so that the illumination intensity required by the growth of the submerged plant is met.
In the lighting device provided by the invention, the digital display is provided with a power supply module, and the power supply module is a solar power supply.
The invention also provides a method for accelerating the growth of the submerged plants in the low-transparency water body by using the dimming device, which comprises the following steps:
sampling and investigating, and analyzing the optimal illumination condition of the submerged plant of the target polluted water body and the data of the optical compensation point of the submerged plant;
placing the lighting device in the target polluted water body, and transmitting sunlight on the surface of the water body to a dim water body below the water surface by using the lighting device to supply sufficient illumination conditions for submerged plants;
the light intensity in the water body is measured and adjusted, so that the submerged plant can grow under the optimum condition of light.
The invention has the beneficial effects that:
the daylighting device does not need electric power, utilizes sunlight for illumination, does not have electric power hidden danger, and is a simple, convenient, efficient, green, environment-friendly and sustainable project. The lighting device can be provided with a light quantity regulator, and the light quantity can be regulated according to the actual condition (water quality condition, depth, submerged plant characteristics and the like) of the black and odorous riverway to be treated.
Drawings
FIG. 1 is a schematic structural view of a light guide lighting device;
FIG. 2 is a schematic diagram of a light pipe lighting device;
in the figure, 1 is a light guide tube lighting device, 2 is a lighting cover, 3 is a light guide tube, 4 is a diffuser, 5 is a floating plate, 6 is a sinker, 71 is a digital display, and 72 is a probe. The lighting cover of the light pipe lighting device has the inner diameter D and the height H.
Detailed Description
The present invention will be described in further detail with reference to the following specific examples and the accompanying drawings. The procedures, conditions, experimental methods and the like for carrying out the present invention are general knowledge and common general knowledge in the art except for the contents specifically mentioned below, and the present invention is not particularly limited.
As shown in fig. 1, the lighting device for accelerating the growth of submerged plants in a low-transparency water body of the present invention comprises: a light pipe 3 penetratingly arranged on the floating plate 5, a lighting cover 2 is arranged at the top end of the light pipe 3, and a diffuser 4 is arranged at the bottom end of the light pipe 3; the floating plate 5 is a flat plate with the density smaller than that of the water body, and the bottom of the floating plate 5 is connected with at least one sinker 6 with the density larger than that of the water body.
In the lighting device provided by the invention, the lighting cover 2 is hemispherical, the diameter is 30-80cm, the lighting cover is made of optical PC material, and the full-transparent lighting technology enables the device to efficiently collect natural light no matter in haze days or rainy days.
In the lighting device provided by the invention, the light guide pipe 3 is of a cylindrical structure, the diameter is 30-80cm, and the height is 50-150 cm.
In the lighting device provided by the invention, the floating plate 5 is spherical plastic foam with the diameter of 0.5m, the sinker 6 is a cement block with the single weight of 5kg, and the number of the floating plate 5 and the sinker 6 is determined by the flow velocity of the water body in the river channel.
In the preferred embodiment of the present invention, an illuminometer is further arranged beside the light pipe 3, and comprises a digital display 71 and a probe 72; the digital display 71 is fixed on the floating plate 5, the probe 72 is positioned at the top of the underwater submerged plant, the digital display 71 is used for displaying the underwater illumination intensity detected by the probe 72, and the depth of the light guide pipe 3 entering the water can be adjusted, so that the illumination intensity required by the growth of the submerged plant is met. The digital display is provided with a power supply module, the power supply module is a solar power supply and can provide electric energy required by the work of the digital display and the probe.
The method for accelerating the growth of the submerged plants in the polluted low-transparency water body comprises the following specific implementation steps:
1) sampling the submerged plant of the polluted low-transparency water body to a laboratory, setting different illumination conditions to observe the growth condition of the submerged plant, and analyzing the optimum illumination condition for growth.
2) A specially-made light guide pipe lighting device is placed in a polluted low-transparency water body of a target, and the light above the water body is transmitted to a dark water body at the lower part, so that sufficient light conditions are supplied for submerged plants.
3) The illumination intensity in the water body is adjusted, so that the submerged plants can grow rapidly in the water body with the most suitable illumination intensity.
The following is a specific application example of the present invention.
In one embodiment of the invention, the experimental site is a fish pond in a certain rural area in Zhejiang. The area of the water area is about 2000m2Average water depth 15 m. As the fishpond receives the domestic and industrial sewage and garbage of peripheral residents, causes the water body to be black and smelly, is not suitable for aquatic organisms to live, the submerged plants (aquatic plants) are seriously degraded, and the primary productivity is about 42gC/m 2/y. Sampling the aquatic weeds in the fish pond to a laboratory in 3 months, setting different illumination conditions for observationThe growth condition shows that the aquatic weeds have the strongest photosynthetic capacity under the light intensity of 800umol/m2/s, and grow most rapidly.
And 9, placing a special light guide pipe lighting device in the fishpond, wherein the light guide pipe lighting device 1 is of a cylindrical structure and mainly comprises a lighting shade 2, a light guide pipe 3, a diffuser 4 and an illuminometer. The lighting shade 2 is hemispherical, has a diameter of 50cm and is made of optical PC material; the light pipe 3 has a diameter of 50cm and a height of 120 cm. 10 plastic foam floating plates 5 with the diameter of 0.5m are hung around the lighting cover 2, two sides of the bottom of the light guide pipe 3 are connected with 4 cement sinkers 6 with the single weight of 5kg, and the floating plates 5 and the sinkers 6 are adjusted to ensure that the light guide pipe lighting device 1 is vertically erected in water and keeps fixed in position. And opening the light pipe lighting device 1, transmitting the illumination above the fish pond to the dark water body, and supplying sufficient illumination conditions for the aquatic weeds.
Setting the illumination intensity in the water body to 800umol/m by using an illuminometer2And s. Primary productivity in the pond is measured periodically and at fixed points. After the light guide pipe lighting device 1 continuously runs for 7 days, the primary productivity of the aquatic weeds is obviously improved to 780gC/m2Y is calculated as follows. After the device is continuously operated for 14 days, the primary productivity of the aquatic weeds reaches 1000gC/m 2/y. The light pipe light device 1 is then moved to another location. In 12 months in 2014, the detected water quality index of the fishpond reaches the IV type standard of surface water, and the water quality is kept stable all the time. The surrounding of the pond is odorless, and the water body is clear. The water quality of the pond can be restored for fish culture. Therefore, the device and the method can effectively accelerate the growth of the submerged plants in the polluted low-transparency water body.
The protection of the present invention is not limited to the above embodiments. Variations and advantages that may occur to those skilled in the art may be incorporated into the invention without departing from the spirit and scope of the inventive concept, and the scope of the appended claims is intended to be protected.

Claims (5)

1. A lighting device for accelerating the growth of submerged plants in a low-transparency water body is characterized by comprising: the light guide pipe is penetratingly arranged on the floating plate, a light-collecting cover is arranged at the top end of the light guide pipe, and a diffuser is arranged at the bottom end of the light guide pipe; the floating plate is a flat plate with the density smaller than that of the water body, and the bottom of the floating plate is connected with at least one sinker with the density larger than that of the water body;
the illumination meter is arranged beside the light guide pipe; the illuminometer comprises a digital display and a probe; the digital display is fixed on the floating plate, the probe is positioned at the top of the underwater submerged plant, and the digital display is used for displaying the underwater illumination intensity detected by the probe, adjusting the water inlet depth of the light pipe and meeting the illumination intensity required by the growth of the submerged plant.
2. A lighting device according to claim 1, wherein said lighting cover is hemispherical, 30-80cm in diameter, and is made of optical grade PC.
3. A daylighting device according to claim 1, wherein the light pipe is of a cylindrical structure, and has an adjustable depth of penetration, a diameter of 30-80cm, and a height of 50-150 cm.
4. A daylighting device according to claim 1, wherein the digital display has a power module, and the power module is a solar power supply.
5. A method for accelerating the growth of submerged plants in a low transparency body of water by using a lighting device according to any one of claims 1 to 4, comprising:
sampling and investigating, and analyzing the optimal illumination condition of the submerged plant of the target polluted water body and the data of the optical compensation point of the submerged plant;
placing the lighting device in the target polluted water body, and transmitting sunlight on the surface of the water body to a dim water body below the water surface by using the lighting device to supply sufficient illumination conditions for submerged plants;
the light intensity in the water body is measured and adjusted, so that the submerged plant can grow under the optimum condition of light.
CN201710960214.7A 2017-10-16 2017-10-16 Method and device for promoting growth of submerged plants in polluted low-transparency water body Active CN107906462B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112176942B (en) * 2020-10-29 2022-09-20 南京信息职业技术学院 Corridor structure with river course purification performance
CN112616487A (en) * 2020-12-22 2021-04-09 湖北工业大学 Device for assisting growth of submerged plants

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186013A (en) * 1986-02-05 1987-08-05 Andrew Brett Davis Aqualight-submersible heater and light
CN106764923A (en) * 2016-11-30 2017-05-31 重庆大学 A kind of light compensating apparatus for hanging bed pasture and water

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106718243A (en) * 2017-01-04 2017-05-31 无锡金利达生态科技股份有限公司 A kind of automatic-lifting type environment-friendly materials submerged plant planting platform

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186013A (en) * 1986-02-05 1987-08-05 Andrew Brett Davis Aqualight-submersible heater and light
CN106764923A (en) * 2016-11-30 2017-05-31 重庆大学 A kind of light compensating apparatus for hanging bed pasture and water

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Address after: 200241 No. 500, Dongchuan Road, Shanghai, Minhang District

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Address before: 200062 No. 3663, Putuo District, Shanghai, Zhongshan North Road

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