CN1785848A

CN1785848A - Method of controlling water bloom blue algae

Info

Publication number: CN1785848A
Application number: CNA2005100196446A
Authority: CN
Inventors: 张维昊; 宋立荣; 吴小刚
Original assignee: Institute of Hydrobiology of CAS; Wuhan University WHU
Current assignee: Institute of Hydrobiology of CAS; Wuhan University WHU
Priority date: 2005-10-21
Filing date: 2005-10-21
Publication date: 2006-06-14

Abstract

The present invention discloses a method for controlling aphanizomenon flos-aquae. Said method includes the following steps: (A) constituting biological island: according to the area and depth of water body to be controlled constituting one-layer or two-layer biological island; (B) building biological island: using nylon, plastics or stainless steel to make flexible or rigid floating island unit frame; (C) filling biological island matrix: in the floating island interior filling light, suspension porous and adsorbability matrix; and (D) placing biological island: placing the floating island whose interior is filled up with matrix into eutrophication water body, the microbe can grow in the porous hollow and light carrier and form biological membrane. It can produce the biological island function of removing phosphorus and removing nitrogen and can improve and raise water quality.

Description

A kind of method of controlling bloom blue algae

Technical field

The present invention relates to the repairing and treating field of eutrophication water, more specifically relate to a kind of method of controlling bloom blue algae, be applicable to the improvement of city appearance water body water quality of bay, lake, reservoir, river and the water quality deterioration of the eutrophication that wawter bloom takes place.

Background technology

Along with rapid development of economy, body eutrophication increasingly sharpens.Lake and reservoir for eutrophication break out blue-green alga bloom easily.Wawter bloom is seriously destroyed water ecological environment, quickens the degeneration of lake function; Economic and the social Sustainable development of final influence.Therefore, China is as the numerous country in lake, and the wawter bloom of lake eutrophication and initiation thereof has been very outstanding environmental problem in China, and prevention is administered very urgent.

But the control of blue-green alga bloom is global problem.Up to now,, dropped into lot of manpower and material resources, taked many measures and method to administer for seeking effective blue-green algae control method.From the angle of effecting a permanent cure, comprise that mainly circulation cuts dirt, reduce the polluted water that enters water body, the water quality of water body is taken a turn for the better, but this is a longer-term and difficult task; From the angle of taking stopgap measures, have the physics method promptly machinery remove algae, as the method for dredging, draw in the net to drag for the algae method or add clay flocculating setting agent etc., cost is higher, energy consumption is bigger; Chemical method is that medicine removes algae, as mixing algae, feeding ozone etc. extremely with Losantin with copper sulfate class algicide, chlorine, the life-time service chemical method may exist that pharmacy security, effective drug duration are not grown, secondary pollution or and to other biological problem such as detrimentally affect; Ecological (biology) method is promptly utilized biological bacteria or is put into special water body animal and remove algae as putting into silver carp, algivorous insect, microbial preparation etc., but these measures all fail effectively to solve the bloom blue algae problem.

Because simple chemical method and ecological method fail effectively to control bloom blue algae, utilize chemical ecology to carry out bloom blue algae control just progressively becoming research focus at present, wherein main research is to utilize allelopathy to carry out bloom blue algae control.So-called allelopathy, popular saying is exactly to counteract each other, and promptly plant can take place to suppress or promoter action to the growth of other biology by discharging some chemical substance.

Summary of the invention

The object of the present invention is to provide a kind of method of controlling bloom blue algae, form the chinampa by laying light carrier floating or that be suspended in the water body at the water surface, and plantation has the change sense plant of algal control effect on the chinampa, and the algal control allelochemical of utilizationizations sense plant release is eliminated algae pollution, removes nutritive salt in the water body by plant-growth simultaneously, make up the healthy water ecotope, improve water landscape, increase water quality, and easy maintenance, effect is lasting, has very big application potential.

In order to realize above-mentioned task, the present invention adopts following technical measures, and the method steps of bloom blue algae is as follows in the control water body:

1, set up biological island: according to the area and the degree of depth of administering water body, the water body of depth of water 0.3-2.5m is the chinampa area with the 8-12% of water surface area, makes up the chinampa of one deck or two layers of 18-22cm;

2, biological island is constructed: the Stainless Steel Cloth with aperture 0.5-1cm is that material is made 1m * 1m * 20cm inflexible chinampa unit framework, the upper and lower end is with plastic mesh, the nylon screen back cover of aperture 0.5-1cm, between screen cloth and woven wire by plastics buckle, steel wire is connected.

3, filled biomass island matrix: fill lightweight, suspension, porous, the adsorptivity matrix (plastic cement, float stone, zeolite, haydite) of particle diameter 1-3cm in the framework of chinampa, this is the carrier that depends on of water microorganisms, waterplant and hydrocoles growth;

4, change the sense plant growing: by efficient algal control sense humidogene, the terrestrial plant (comprising calamus, creeping plant tail, Canna generalis Bailey, parasol grass, cattail, reed, Herba Polygoni Amphibii, barley) of research screening, the spacing with 20 * 20cm, one strain on the chinampa is planted.

5, changing the thing island of inducting throws in: eutrophication water is put on chinampa that will plantization sense plant, and change the sense plant and can utilize the nutritive salt in the water body to grow, and by release allelochemical inhibition algal grown.

The present invention compared with prior art has the following advantages and effect:

1, light carrier is not limited only to swim in the water body top layer, and can form three-dimensional arrangement, and the improvement depth is big;

2, floating bed is mainly utilized plant absorbing nutritive salt, regulation effect depends on vegetation growth state, and the allelochemical that the present invention's utilization sense plant is discharged is eliminated algae pollution, improve water landscape, increase water quality, and effect stability, changing the sense plant is per nnial herb, cost is lower, and application potential is big.

3, biological island effect: biomembranous absorption in growth by changing the sense plant and the carrier, growth, can remove the nutritive salt in the eutrophication water on the one hand, reach the biological island function that dephosphorization is denitrogenated.Throw in after 60～70 days, can reduce by 40～80% water nutrition salt concn, the time length can reach 2～3 years.Change allelochemical that the sense plant discharged on the other hand and can make in 7 days that algae density reduces 80-95% in the water body, transparency is brought up to 60-70cm, and extraordinary effect is arranged.

Embodiment

A kind of method steps of nutritive salt of removing in the water body is as follows:

1, set up biological island: according to the area and the degree of depth of administering water body, the water body of depth of water 0.3-2.5m is the chinampa area with 10% of water surface area, makes up the chinampa of one deck 20cm;

2, biological island is constructed: the Stainless Steel Cloth with aperture 1cm is that material is made 1m * 1m * 20cm inflexible chinampa unit framework, and the upper and lower end is with plastic mesh, the nylon screen back cover of aperture 1cm, between screen cloth and woven wire by plastics buckle, steel wire is connected.

3, filled biomass island matrix: fill lightweight, suspension, porous, the adsorptivity matrix (plastic cement, float stone, zeolite, haydite) of particle diameter 2cm in the framework of chinampa, this is the carrier that depends on of water microorganisms, waterplant and hydrocoles growth;

5, changing the thing island of inducting throws in: eutrophication water is put on chinampa that will plantization sense plant, and change the sense plant and can utilize the nutritive salt in the water body to grow, and by release allelochemical inhibition algal grown.Throw in after 60～70 days, can reduce by 40～80% water nutrition salt concn, the time length can reach 2～3 years.Change allelochemical that the sense plant discharged on the other hand and can make in 7 days that algae density reduces 80-95% in the water body, transparency is brought up to 60-70cm, and extraordinary effect is arranged.

Claims

1, a kind of method of controlling bloom blue algae, it comprises the following steps:

A, set up biological island: according to the area and the degree of depth of administering water body, depth of water 0.3-2.5m, water surface area are 8-12%, make up the chinampa of one deck or two layers of 18-22cm;

B, biological island are constructed: the Stainless Steel Cloth with aperture 0.5-1cm is that material is made 1m * 1m * 20cm inflexible chinampa unit framework, the upper and lower end is with plastic mesh, the nylon screen back cover of aperture 0.5-1cm, between screen cloth and woven wire by plastics buckle, steel wire is connected;

C, filled biomass island matrix: fill plastic cement, float stone, zeolite, the haydite of particle diameter 1-3cm in the framework of chinampa, this is the carrier that depends on of water microorganisms, waterplant and hydrocoles growth;

D, change the sense plant growing: it comprises calamus, creeping plant tail, Canna generalis Bailey, parasol grass, cattail, reed, Herba Polygoni Amphibii, barley the efficient algal control sense humidogene by screening, terrestrial plant, on the chinampa with the spacing plantation of 20 * 20cm, one strain;

E, biological island throw in: eutrophication water is put on chinampa that will plantization sense plant, and change the sense plant and can utilize the nutritive salt in the water body to grow, and by release allelochemical inhibition algal grown.