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WO2000055094A1 - Procede et dispositif de reduction ou de limitation de la multiplication d'algues dans des lacs et des etangs eutrophises - Google Patents

Procede et dispositif de reduction ou de limitation de la multiplication d'algues dans des lacs et des etangs eutrophises Download PDF

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Publication number
WO2000055094A1
WO2000055094A1 PCT/JP2000/001605 JP0001605W WO0055094A1 WO 2000055094 A1 WO2000055094 A1 WO 2000055094A1 JP 0001605 W JP0001605 W JP 0001605W WO 0055094 A1 WO0055094 A1 WO 0055094A1
Authority
WO
WIPO (PCT)
Prior art keywords
algae
light
lake
water
lakes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2000/001605
Other languages
English (en)
Japanese (ja)
Inventor
Sadao Kojima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kureha Techno Engineering Co Ltd
Original Assignee
Kureha Techno Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kureha Techno Engineering Co Ltd filed Critical Kureha Techno Engineering Co Ltd
Publication of WO2000055094A1 publication Critical patent/WO2000055094A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G33/00—Cultivation of seaweed or algae
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K61/00—Culture of aquatic animals
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
    • A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
    • A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
    • 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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/80—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in fisheries management
    • Y02A40/81—Aquaculture, e.g. of fish
    • 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
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Definitions

  • the present invention provides a method for improving the water quality of lakes and marshes by reducing the number of algae that have become eutrophic and mature and reducing the growth of algae. And the equipment used to carry out this method.
  • lakes and marshes are lakes, marshes, ponds,
  • This earlier application was based on the viewpoint that the surface of lakes and marshes is shielded from light by a light-blocking material, thereby suppressing the photosynthesis of algae under the light-blocking material and suppressing its growth. It was intended only for relatively shallow lakes with a water depth of less than 5 m.
  • the algae and other floating algae are breeding and floating, regardless of the size or depth of the lake, regardless of the size of the lake or its depth. Up to the surface water depth of about 5 to 6 m, mixing with the deeper water that is deeper than that did not occur, and the solar water did not reach the lower water. Algae do not breed, and furthermore, the surface water at a depth of 5 to 6 m moves by wind, but the water in the lower layer hardly moves. Suspended algae and plankton, such as aquatic plants, located below the members are inhibited from activating and lose their reproductive power, and do not reproduce when exposed to sunlight again, and die. I learned to do it.
  • the water depth may be more than 5 to 6 m, for example, about 10 m.
  • floating algae such as cocoa may be developed, the present invention can of course be applied effectively even in such places. .
  • the present invention is based on the above-mentioned knowledge and based on the depth and size of lakes and marshes. It is an object of the present invention to provide a method for reducing or suppressing the growth of algae in eutrophic lakes and mars, and a device therefor, and a device therefor. It is something.
  • the constitution of the present invention aimed at solving the above-mentioned problems is to reduce the number of algae that flourish due to eutrophication or to suppress the growth of algae.
  • a buoyant light-blocking member is floated on the water surface of the lake, and the water surface in the lake is blocked from light so as to have a required light-shielding rate, thereby inhibiting the photosynthesis of algae.
  • the present invention is characterized in that the algae is reduced or its growth is suppressed, and the configuration of an apparatus for performing the method is a plus.
  • a suitable number of buoyant light-blocking members formed in an appropriate plane shape from a buoyant material such as a chip or a tree are connected loosely to each other individually or to each other. Is formed in an area that can be accommodated in the frame member to obtain the required light blocking ratio.
  • the feature is that the water surface of the lake is made to float on the surface of the lake so that the water surface of the lake is partially shaded.
  • FIG. 1 is a plan view of a first example of a buoyant light shielding member used in the present invention
  • FIG. 2 is a cross-sectional view of the member of FIG. 1
  • FIG. 3 is a plan view of a second example of a light shielding member
  • FIG. 3 is a cross-sectional view of the member
  • FIGS. 5 and 6 are plan views of third and fourth examples of the light shielding member
  • FIGS. 7, 8 and 9 show examples of use of the light shielding member of FIG. 3, respectively.
  • FIG. 10 is a plan view of FIG. 9 taken along line A—A in FIG. 9,
  • FIG. 11 is a plan view of an example of using a light shielding member
  • FIG. 12 is a plan view of FIG. B—B view, FIG.
  • FIG. 13 is a plan view of the light shielding member of FIG. 11 in a united state
  • FIG. 14 is a cross-sectional view of FIG. 13
  • FIG. 15 is used in the present invention.
  • FIG. 16 is a perspective view of a fifth example of the light shielding member
  • FIG. 16 is a plan view of an example in which the light shielding member of FIG. 15 is formed in a raft-shaped light shielding member unit
  • FIG. 17 is a third view of the arrangement of the light shielding member of FIG.
  • FIG. 18 is a plan view showing a second example of the arrangement of the light shielding member in FIG. 16
  • FIG. 19 is a view taken along line C--C in FIG. 18, and
  • FIG. 20 is an arrangement of the light shielding member in FIG.
  • FIG. 21 is a plan view showing the third example of FIG. 20, and FIG. 21 is a view taken along line D-D in FIG.
  • la to Id are buoyant light-blocking members formed into a square, rectangular, or hexagonal shape when viewed from a plane force, respectively, and here, as an example, polyethylene. It is molded to float on the water surface with hollow or air bubbles by using a polyolefin plastic such as polypropylene or polypropylene. In this case, it is desirable that the specific gravity be such that when the light-shielding members la to Id are floated on the surface of the water, the waterline is approximately near the center of the height (thickness) of the float. .
  • the light-shielding members la to Id are swirled or blown by the wind, they are stably floated on the water surface without being inverted.
  • the light shielding members lb to Id shown in FIGS. 3 to 5 are formed such that the center of each of the front and back surfaces is formed at a middle height h, so that the members overlap due to ripples and wind. In addition to being able to recover naturally, it is formed so that rainwater and sand do not accumulate on the upper surface. For this reason, a hole 2 may be provided in the center of the member.
  • the light-shielding members la to ld may be made of plastic molded products such as wood, other fibers, or medium. Any material can be used as long as it is formed in the same manner as the above-mentioned light shielding member and floats on water, such as an air body.
  • the light-shielding members la to Id thus formed are appropriately placed on the left half side of the whole water surface WL in the lake L as shown in FIG. 7 so that the left half side has a required light-shielding rate. And put them in a floating state without connecting them individually.
  • the light shielding members lb are floated on the water surface in a free state without being connected or restrained to each other, so that the light shielding member group is caused by the flow of wind or water blowing on the lake or marsh.
  • the light-blocking member group moves in a state in which the entire light-blocking member is substantially united, and the water on the surface layer where the air floats is also moved by the above-mentioned wind and water flow.
  • the light shielding effect of the surface of the surface water in which the cocoon floats due to the group of the light shielding members lb is not substantially impaired because it moves in the same direction as the group. confirmed.
  • the present invention by arranging the light-shielding members lb in the manner shown in FIGS. 7 to 9, as shown in FIG. Floating algae such as seaweed float in the surface water Hw that is shaded by the morphology, but due to shading, these algae do not proliferate, but are reduced or killed. It can improve the water quality in some areas. Then, the surface water Hw including the water under the light shielding member lb moves due to the wind and the waves, and the water entering under the light shielding member lb by this movement causes the water and the like to move. When suspended, as described above, the cocoa and the like are unable to photosynthesize, have a reduced activity, and are proliferated without being activated even when exposed again to sunlight.
  • Figures 8 to 10 show other examples of arranging a light-blocking member lb on the surface of lake water.
  • 3 and 4 indicate that the light-blocking member lb is It is an oil-fence-like partitioning fence that restrains free floating on the lake water.
  • the surface of the lake is roughly divided into half, and in Fig. 9, a loop is formed. It is arranged so that it draws.
  • the partition fences 3 and 4 may be attached to the lake shore, or may be provided with a sufficient length of cable 5 in order to keep themselves at a substantially fixed position on the lake water. And moored at anchor or weight 6.
  • the buoyant light-shielding member 1b or 1a, 1c, 1d is placed on the surface of the lake, covering a part of the entire surface, and within a certain range, It is thrown in and placed in such a way that it can be floated relatively freely, and it can be placed between the surface of the light shielded by the light-shielding member and the water depth of about 5 to 6 m.
  • the photosynthesis of suspended algae is cut off, whereby the growth of the algae can be significantly reduced or suppressed.
  • the arrangement of the light-shielding members la to Id which can inhibit the activation of the algae and suppress the growth of the algae as described above is not limited to the arrangement shown in FIGS. 7 to 10. However, the arrangement may be the one illustrated in FIGS. 11 to 14 and will be described.
  • the light shielding member 1b is used as in the previous example, but the same applies to the case of using the light shielding members 1a, lc, and Id.
  • a number of light shielding members lb, ie, 64 light shielding members lb are arranged and arranged inside a light shielding float frame F in which the float tube 7 is formed into a square as shown in FIG.
  • the light frame F is one unit, and the light shielding frame F of 25 units is arranged in a square shape.
  • Figure 11 shows an example.
  • Fig. 11 is suitable for shading a part of the surface of a large lake, and is useful for shading surface water in a large lake with a large surface area. It is. 11 to 13, the same reference numerals as those in FIGS. 1 to 10 denote the same members or the same parts.
  • FIGS. 11 to 14 although it is a part of the water surface in lakes and marshes, it is a particularly preferable light shielding member for forming a light shielding part on a wide surface layer.
  • a large light shielding member le as shown in FIGS. 15 and 16 is used. That is, this light-shielding member le has a middle-height h similar to the light-shielding member lb in FIG. 4 in cross-section, but the entire light-shielding member le is formed to have a long cross-sectional shape.
  • the long type light blocking member le is formed by arranging a plurality of the light blocking members le in parallel, and loosely connecting the adjacent light blocking members le with a connecting member 8 such as a connecting cable. It is formed on a raft-shaped light shield Fp (see Fig. 16), and this light shield Fp is regarded as one unit, and a plurality of light shields Fp are formed in lakes and marshes as shown in Figs. 17 to 21. It is placed on the water surface. When the light shield Fp is provided in such an arrangement, the water surface of the lake can be shielded on a large scale, and thus the efficiency is extremely high. 17 to 21, the same reference numerals as those in FIGS. 1 to 12 indicate the same members or the same parts.
  • any of the light-shielding members la to le or a mixture of these light-shielding members is used to create a surface layer where floating alga such as aquatic organisms float in the lakes and marshes.
  • the water surface of the part, The algae and other floating algae can be removed from the lake water by shielding 100% of the aquatic organisms, etc. It describes how to effectively suppress abnormal growth due to nutrients.
  • the present invention depends on the water level and the geographical environment of the place where the lake is located, about 5 to 6 m from the surface of the lake where the floating algae such as seaweed float.
  • a light-blocking member By covering the water surface of the surface up to a depth of about 10 m with a light-blocking member, it becomes possible to purify the lake irrespective of the depth and scale of the lake.
  • the present invention is as described above, wherein a required number of buoyant light-blocking members are floated on the water surface of a lake where algae are abnormally breeding due to eutrophication, and a part of the water surface of the lake is appropriately changed.
  • a shading rate By shading at a shading rate, the activity of suspended algae such as cocoa floating in the shaded surface water is reduced or killed.
  • Abnormal occurrence of floating algae such as cocoa due to eutrophication can be effectively and efficiently suppressed without using any artificial energy, and lakes and marshes can be purified. You.

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  • Life Sciences & Earth Sciences (AREA)
  • Environmental Sciences (AREA)
  • Marine Sciences & Fisheries (AREA)
  • Animal Husbandry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Zoology (AREA)
  • Cleaning Or Clearing Of The Surface Of Open Water (AREA)
  • Aeration Devices For Treatment Of Activated Polluted Sludge (AREA)

Abstract

L'invention concerne un procédé de réduction ou de limitation de la multiplication d'algues dans des lacs et des étangs eutrophisés, indépendamment de la taille et de la profondeur des lacs et des étangs, ainsi qu'un dispositif afférent. On fait flotter des éléments (1a à 1e) flottants de filtrage de lumière à la surface de l'eau (WL) d'un lac (L), où on cherche à réduire ou à limiter la multiplication d'algues croissant en abondance à cause d'un phénomène d'eutrophisation, afin de protéger la surface de l'eau du lac (L) de la lumière. On obtient ainsi un taux de filtrage spécifié, permettant de gêner la photosynthèse des algues et de réduire ou de limiter leur multiplication.
PCT/JP2000/001605 1999-03-16 2000-03-16 Procede et dispositif de reduction ou de limitation de la multiplication d'algues dans des lacs et des etangs eutrophises Ceased WO2000055094A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11/70990 1999-03-16
JP07099099A JP4856801B2 (ja) 1999-03-16 1999-03-16 富栄養化した湖沼等における藻類を減少又はその増殖を抑制する方法、及びそのための装置

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Publication Number Publication Date
WO2000055094A1 true WO2000055094A1 (fr) 2000-09-21

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JP (1) JP4856801B2 (fr)
WO (1) WO2000055094A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005091701A3 (fr) * 2004-03-23 2005-11-10 Pascual Antonio Jose Maestre Module flottant destine a couvrir des reservoirs d'eau a l'air libre
CN101595793B (zh) * 2009-06-09 2011-03-16 南京大学 一种入湖河口芦竹种植培育方法
CN107555623A (zh) * 2017-10-19 2018-01-09 南京瑞盛环保技术有限公司 基于水面漂浮光伏发电站的控藻系统
CN116409832A (zh) * 2023-03-13 2023-07-11 中国科学院生态环境研究中心 一种利用悬浮颗粒物投加抑制目标藻类生长的方法

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004263371A (ja) * 2003-02-12 2004-09-24 Ichiro Imai 藻類の抑制方法
JP4330350B2 (ja) * 2003-02-13 2009-09-16 株式会社クレハエンジニアリング 水質汚濁防止方法及び水流遮断フェンス
JP4546211B2 (ja) * 2004-10-07 2010-09-15 株式会社ベリタス 湖沼等における藻類の制御方法および装置
JP5197019B2 (ja) * 2005-12-26 2013-05-15 株式会社クレハ環境 水上フロートおよびその連結体
EP2205482A2 (fr) * 2007-10-09 2010-07-14 Leslie A. Field Systèmes pour changements environnementaux utilisant des matériaux de régulation climatique et des couvertures
WO2009048628A2 (fr) * 2007-10-09 2009-04-16 Field Leslie A Procédés pour changements environnementaux utilisant des matériaux de régulation climatique et des couvertures
US20100282860A1 (en) * 2007-11-15 2010-11-11 Field Leslie A Systems for environmental modification with climate control materials and coverings
KR200460631Y1 (ko) 2011-10-13 2012-07-03 허종형 조류증식 억제장치
KR101169558B1 (ko) * 2011-11-21 2012-07-27 허종형 조류증식 억제장치

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0326306A (ja) * 1989-06-21 1991-02-04 Kurita Water Ind Ltd 浄水場の沈殿池での藻類発生防止方法
WO1996028387A1 (fr) * 1995-03-14 1996-09-19 Yutaka Tokunaga Appareil de purification d'eau pour bassin
JPH08243538A (ja) * 1995-03-13 1996-09-24 Aqua Tec Kk 植物プランクトンの増殖抑制方法及び装置
JPH0999283A (ja) * 1995-10-04 1997-04-15 Marsima Aqua Syst Corp 池水等の浄化装置
JPH10309765A (ja) * 1997-05-13 1998-11-24 Japan Vilene Co Ltd 発泡樹脂遮光体
JPH11319798A (ja) * 1998-05-07 1999-11-24 Velitas Kk 水質改善用遮光部材

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0326306A (ja) * 1989-06-21 1991-02-04 Kurita Water Ind Ltd 浄水場の沈殿池での藻類発生防止方法
JPH08243538A (ja) * 1995-03-13 1996-09-24 Aqua Tec Kk 植物プランクトンの増殖抑制方法及び装置
WO1996028387A1 (fr) * 1995-03-14 1996-09-19 Yutaka Tokunaga Appareil de purification d'eau pour bassin
JPH0999283A (ja) * 1995-10-04 1997-04-15 Marsima Aqua Syst Corp 池水等の浄化装置
JPH10309765A (ja) * 1997-05-13 1998-11-24 Japan Vilene Co Ltd 発泡樹脂遮光体
JPH11319798A (ja) * 1998-05-07 1999-11-24 Velitas Kk 水質改善用遮光部材

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005091701A3 (fr) * 2004-03-23 2005-11-10 Pascual Antonio Jose Maestre Module flottant destine a couvrir des reservoirs d'eau a l'air libre
CN101595793B (zh) * 2009-06-09 2011-03-16 南京大学 一种入湖河口芦竹种植培育方法
CN107555623A (zh) * 2017-10-19 2018-01-09 南京瑞盛环保技术有限公司 基于水面漂浮光伏发电站的控藻系统
CN116409832A (zh) * 2023-03-13 2023-07-11 中国科学院生态环境研究中心 一种利用悬浮颗粒物投加抑制目标藻类生长的方法

Also Published As

Publication number Publication date
JP4856801B2 (ja) 2012-01-18
JP2000263034A (ja) 2000-09-26

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