CN102816700B - Over-water enclosure type floating island algae cultivation technology - Google Patents
Over-water enclosure type floating island algae cultivation technology Download PDFInfo
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- CN102816700B CN102816700B CN201210288600.3A CN201210288600A CN102816700B CN 102816700 B CN102816700 B CN 102816700B CN 201210288600 A CN201210288600 A CN 201210288600A CN 102816700 B CN102816700 B CN 102816700B
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Abstract
The invention relates to an over-water enclosure type floating island algae cultivation technology. According to the technology, a layer of a thin film is arranged in a euphotic layer depth range of a eutrophication nature water body, and the periphery of the thin film is fixed on a floating bed higher than the water surface to form an enclosure floating island; a power facility is adopted to directly pump the water body below the euphotic layer into the enclosure floating island, at the same time it is ensured that the isolated water body inside the enclosure floating island is always in the euphotic layer; an aeration device is arranged on the bottom of the enclosure floating island, and air is endlessly introduced to the isolated water body inside the enclosure floating island, such that the isolated water body inside the enclosure floating island is completely mixed; the isolated water body inside the enclosure floating island is subjected to disinfection and sterilization, and then is correspondingly added with a mature culture medium to carry out microalgae cultivation, and the microalgae water body is collected when a chlorophyll a concentration is more than 1000 mug/L to achieve a purpose of over-water microalgae cultivation. According to the present invention, low cost microalgae cultivation can be performed on the water surface, and the technology is suitable for most of eutrophication water bodies, and can further be applicable for urban pollution rivers and oceans after appropriate improvements.
Description
Technical field
Algae technology is supported on a kind of enclosure formula waterborne of the present invention chinampa, relates to micro-algae and cultivates field.
Background technology
Since the nearly century, world population rapid growth, industrial develop rapidly, resource consumption increases suddenly.On the one hand, the fossil oil overexploitation taking oil, fire coal as representative, is close to exhaustion, and energy shortage becomes the current and subject matter of society later; On the other hand, a large amount of consumption of fossil oil causes greenhouse gases to discharge in a large number, from the 1950's, and CO
2concentration level and global temperatures have had obvious rising, have aggravated global warming benefit, cause exceedingly odious weather to take place frequently.Therefore, find sustainable regeneration, eco-friendly novel energy is imperative.
Shortage of water resources and water environmental problems are also the baptisms that human society faces.Along with the deep development of human social economy's activity, the trade effluent that contains in a large number the pollutent such as nitrogen, phosphorus enters water body, causes body eutrophication, causes that algae overgrowing, harmful algal bloom take place frequently, deteriorating water quality, and mankind's safe drinking water in serious threat.The Hu Ku algal blooms every year such as Taihu Lake, Chaohu, Dian Chi and Three Gorges Reservoir form and have a strong impact on respective regions mankind's activity.Meanwhile, the countries and regions in the whole world 40% are faced with water shortage problem, and the sustainable use of water resources is extremely urgent.Adopt water body recycle significant to minimizing sewage discharge, alleviation shortage of water resources.Therefore, research and develop efficient, cheap, water quality advanced purification technology has significant application prospect easily.
Micro-algae may be the ultimate outlet that the mankind address the above problem.First, microalgae grease content is higher, and some unicellular micro-algae can accumulate the grease that is equivalent to dry cell weight 20%～70%, and it is 80 times of unit surface vegetable seed oil yield rate, is unique raw material that may replace fossil energy known today.Secondly, micro-algae has that growth velocity is fast, results short, photosynthetic utilising efficiency high in period, annual fixing CO
2account for greatly 40% of global net photosynthesis output, can effectively absorb greenhouse gases, alleviate global greenhouse effect.Meanwhile, in micro algae growth process, can absorb in a large number the pollutent such as nitrogen, phosphorus in water body, as long as can effectively gather, can carry out high-efficient purification to sewage.
But how by artificial large scale culturing technology, obtaining micro algae biomass is the key that micro-algae develops efficient, cheaply.Present micro-algae culture technique focuses mostly in light autotrophy system; comprise outdoor open cultivation and various bioreactor; mainly carry out on land, water consumption, consumption ground, power consumption, consumption equipment have increased micro-algae and have cultivated cost, become the main neck bottle of its large-scale production.China's most of earth's surface water is all subject to nitrogen and phosphorus pollution in various degree, especially Basin of Huaihe River, Deng Hu storehouse, Yangtze valley body eutrophication are very serious, how to research and develop the micro-algae High effecfive technique of low cost, can reduce water consumption, reduce kinetic energy and then dwindle cost, again can purifying water body, absorbing carbon dioxide, reduces environmental pollution pressure, has important application prospect.Meanwhile, China's oceanic resources are abundant, if the micro-algae culture technique of marine low cost research and develop successfully, by for the artificial large scale culturing of micro-algae provides wide space, significant.
Summary of the invention
Technical problem to be solved by this invention is to propose a kind of enclosure formula waterborne chinampa to support algae technology, can isolate a part of eutrophication water, make it in euphotic layer, fully accept all the time illumination, algae utilizes natural water body high resolution carbonic acid gas and high nutritive salt to breed, and then reach the objects such as the convenient cultivation of micro-algae, polluted water purification, the solid carbon of reduction of discharging, greatly dwindle micro-algae and cultivate cost.
Above-mentioned purpose of the present invention is to realize by such technical scheme: algae technology is supported on a kind of enclosure formula waterborne chinampa, comprise the following steps: step 1: in the euphotic layer depth range of eutrophication natural water body, thin film is set, and film surrounding is fixed in the floating bed that exceeds the water surface, form an enclosure chinampa; Step 2: utilize power facility that the water body below euphotic layer is directly pumped in enclosure chinampa, ensure that isolation water body in enclosure chinampa is all the time in euphotic layer simultaneously; Step 3: for making isolation water body in enclosure chinampa in admixture, in bottom, enclosure chinampa, aerating apparatus is set, air is constantly input in the isolation water body on enclosure chinampa, the isolation water body in enclosure chinampa is fully mixed;
Step 4: then to the isolation water body on enclosure chinampa carry out disinfection, sterilization, add corresponding maturation medium and carry out micro-algae cultivation, after its chlorophyll-a concentration exceedes certain threshold values, micro-algae water body is collected, reach the object that micro-algae waterborne is cultivated.
Algae technology is supported on a kind of enclosure formula waterborne chinampa, comprises the following steps: step 1: in the euphotic layer depth range of eutrophication natural water body, thin film is set, the surrounding of film is fixed on support, support is erected on floating drum, forms enclosure chinampa;
Step 2: utilize water pump that the eutrophic water body below euphotic layer is pumped in enclosure chinampa, pump intake is established filtering net,
Step 3: utilize air compressor machine that air is input to the bottom on enclosure chinampa and is discharged by tracheae, guarantee in enclosure chinampa that water body is in admixture; Step 4: to water body in enclosure chinampa carry out disinfection, sterilization, throw in corresponding substratum, allow water body cultivate in enclosure chinampa; After treating that the interior water body chlorophyll alpha concentration of enclosure is greater than 1000 μ g/L, algae is collected and processed.
A kind of enclosure formula waterborne chinampa, comprises the film that is positioned at water body euphotic layer, and film surrounding is fixed on support, and support is arranged on floating drum, forms enclosure chinampa.Described support is provided with water pump, water pump connecting water pipe, water pump is pumped into the eutrophic water body below euphotic layer in enclosure chinampa by water pipe, and described support is provided with air compressor machine, air compressor machine connects tracheae, and air compressor machine is input to air enclosure chinampa inner bottom part and is discharged by tracheae.Described water pump connecting water pipe, the water inlet position of water pipe is provided with filtering net.
Algae technology is supported on a kind of enclosure formula waterborne of the present invention chinampa, can on the water surface, carry out the micro-algae of low cost cultivates, be applicable to the waters such as China most of eutrophic water bodies, especially Three Gorges Reservoir, Taihu Lake, Dian Chi, after suitably improving in municipal pollution river and in ocean, also can apply.This technology combines the benefits such as simple and easy micro-algae cultivation, carbon dioxide absorption, water body purification, significantly reduce micro-algae and cultivated cost, expand micro-algae and cultivated added benefit, save soil simultaneously, provide strong technical support for micro-algae carries out extensive development within the scope of the wide waters such as fresh water, seawater.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described:
The theoretical schematic diagram of critical layer of Fig. 1 principle of the invention.
Fig. 2 is the present invention's enclosure formula waterborne chinampa structural representation.
Embodiment
Algae technology is supported on a kind of enclosure formula waterborne chinampa, according to critical layer theory, in eutrophication natural water body euphotic layer depth range, thin film is set, and film surrounding is fixed in the floating bed that exceeds the water surface, forms an annular enclosure chinampa.
Utilize power facility that the eutrophy body of salt below euphotic layer is directly pumped in enclosure chinampa, because of water phytoplankton in euphotic layer and animal relative concentration higher, ensure to extract the water body below euphotic layer as far as possible.Ensured in enclosure chinampa that isolation water body is all the time in euphotic layer.
For making water body in enclosure chinampa in admixture, in bottom, enclosure chinampa, aerating apparatus is set, air is constantly input in enclosure floating island water body, impel water body in enclosure chinampa fully to mix.In enclosure chinampa, water body just can be accepted illumination sufficiently uniformly like this.Then to enclosure floating island water body carry out disinfection, sterilization, add corresponding maturation medium and carry out micro-algae cultivation, reach after 1000 μ g/L wait cultivating 5-7 days, chlorophyll-a concentration, micro-algae water body is collected, reach the object that the micro-algae of low cost waterborne is cultivated.
Embodiment:
As shown in Figure 1, critical layer theory thinks, the in the situation that of nutritive salt abundance, algae primary productivity and photosynthetically active radiation are linear, and the algae primary productivity loss causing because of respiration, predation, sedimentation etc. is certain value along depth of water direction; The degree of depth that the clean productivity of algae is zero point is called light compensation depth, and light compensation depth is above is called euphotic layer to the water surface; Down carrying out clean productivity from surface along the depth of water adds up, clean productivity accumulated value has reflected Alga increasing potentiality in water column, clean productivity accumulated value reaches maximum at light compensation depth place, reduce gradually below from light compensation depth, also there is a zero point, this depth of water is the critical layer degree of depth, and below the critical layer degree of depth, clean productivity accumulated value is less than zero.In addition, the impacts such as water body Yin Wendu, salinity, sediment concentration, there is certain water body vertical layered structure, affected by illumination, wind disturbance etc. near water surface one deck water body, the vertical blending of water body is strong, be called mixolimnion, because of algae density and water body density difference less, think in mixolimnion that algae is vertical to be evenly distributed.Like this, the relativeness that mixolimnion, euphotic layer, critical layer are three layers, has determined Alga increasing potentiality in water column.That is: in the time that mixolimnion is below critical layer, in water column, the clean productivity accumulated value of algae is less than zero, and phytoplankton growth is restricted, and wawter bloom disappears; In the time that mixolimnion occupy between euphotic layer and critical layer, in water column, the clean productivity of algae is less, and algae proliferation is slower; In the time that mixolimnion is less than or equal to euphotic layer, in water column, the clean productivity of algae reaches maximum, plant plankton overgrowing.Therefore, as long as ensure that water mixing layer depth is all the time in euphotic layer, and provide sufficient nutrient salt, restriction zooplankton, just can make algae increase rapidly.
As shown in Figure 2, algae technology is supported on a kind of enclosure formula waterborne chinampa, determines the water body euphotic layer degree of depth and the depth of water; In euphotic layer, certain depth of water place film laying 1, as polyethylene film, is fixed on the surrounding of film 1 on support 3, and support 3 is erected on floating drum 2, forms enclosure chinampa.
Utilize water pump 4 that the eutrophic water body below euphotic layer is pumped in enclosure chinampa, water pump 4 water-ins are established filtering net 7, prevent that zooplankton from entering enclosure chinampa, ensure that the inside and outside water level in enclosure chinampa maintains an equal level.To water body in enclosure chinampa carry out disinfection, sterilization, throw in corresponding substratum.Utilize air compressor machine 5 that air is input to enclosure chinampa inner bottom part and is discharged by tracheae 6, guarantee in enclosure chinampa that water body is in admixture.Allow water body cultivate in enclosure chinampa, after treating in enclosure chinampa that water body chlorophyll alpha concentration is greater than 1000 μ g/L, algae is collected and processed, reach the object that the micro-algae of low cost waterborne is cultivated.
Claims (2)
1. algae method is supported on an enclosure formula waterborne chinampa, it is characterized in that comprising the following steps: step 1: in the euphotic layer depth range of eutrophication natural water body, thin film is set, and film surrounding is fixed in the floating bed that exceeds the water surface, form an enclosure chinampa; Step 2: utilize power facility that the water body below euphotic layer is directly pumped in enclosure chinampa, ensure that isolation water body in enclosure chinampa is all the time in euphotic layer simultaneously; Step 3: for making isolation water body in enclosure chinampa in admixture, in bottom, enclosure chinampa, aerating apparatus is set, air is constantly input in the isolation water body on enclosure chinampa, the isolation water body in enclosure chinampa is fully mixed; Step 4: then to the isolation water body on enclosure chinampa carry out disinfection, sterilization, add corresponding maturation medium and carry out micro-algae cultivation, after its chlorophyll-a concentration exceedes certain threshold value, micro-algae water body is collected, reach the object that micro-algae waterborne is cultivated.
2. the foster algae method on enclosure formula waterborne chinampa, is characterized in that, comprises a kind of enclosure formula waterborne chinampa, this chinampa comprises the film (1) that is positioned at water body euphotic layer, it is upper that film (1) surrounding is fixed on support (3), and it is upper that support (3) is arranged on floating drum (2), forms enclosure chinampa; Described support (3) is provided with water pump (4), water pump (4) connecting water pipe, water pump (4) is pumped into the eutrophic water body below euphotic layer in enclosure chinampa by water pipe, described support (3) is provided with air compressor machine (5), air compressor machine (5) connects tracheae (6), air compressor machine (5) is input to air enclosure chinampa inner bottom part and is discharged by tracheae (6), described water pump (4) connecting water pipe, and the water inlet position of water pipe is provided with filtering net (7);
Adopt described enclosure formula waterborne chinampa to support algae step:
Step 1: thin film (1) is set in the euphotic layer depth range of eutrophication natural water body, the surrounding of film (1) is fixed on to support (3) upper, it is upper that support (3) is erected at floating drum (2), forms enclosure chinampa;
Step 2: utilize water pump (4) that the eutrophic water body below euphotic layer is pumped in enclosure chinampa, the water inlet position of water pipe is provided with filtering net (7);
Step 3: utilize air compressor machine (5) that air is input to the bottom on enclosure chinampa and is discharged by tracheae (6), guarantee in enclosure chinampa that water body is in admixture;
Step 4: to water body in enclosure chinampa carry out disinfection, sterilization, throw in corresponding substratum, allow water body cultivate in enclosure chinampa, after treating in enclosure that water body chlorophyll alpha concentration is greater than 1000 μ g/L, algae is collected and is processed.
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| CN109323891A (en) * | 2018-09-30 | 2019-02-12 | 中国科学院东北地理与农业生态研究所 | A method of estimation lake euphotic zone depth |
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| CN103805501B (en) * | 2014-03-12 | 2015-07-15 | 湖北工业大学 | Overwater enclosure type microalgae culture device and method |
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| CN202435923U (en) * | 2011-08-12 | 2012-09-19 | 中国环境科学研究院 | Algae growth enclosure device |
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| US6918206B2 (en) * | 2002-07-02 | 2005-07-19 | Richard J. Schuck | Floating island planting system |
| CN100576997C (en) * | 2004-05-24 | 2010-01-06 | 方太海德有限公司 | Adjustably buoyant enhanced floating island |
| CN1843085A (en) * | 2005-11-12 | 2006-10-11 | 中国海洋大学 | Cladosiphon okamuranusa marine cultivation method |
| CN101697712B (en) * | 2009-10-24 | 2011-08-17 | 浙江省淡水水产研究所 | Method for using water hyacinths as resources |
| CN102120648B (en) * | 2011-01-30 | 2012-05-30 | 蒲渊 | Water quality treatment suspending bed for eutrophic water area and water treatment method thereof |
| CN201990540U (en) * | 2011-04-12 | 2011-09-28 | 宁波市农业科学研究院 | Combined ecological floating bed |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101497473A (en) * | 2009-03-20 | 2009-08-05 | 上海大祺环保工程有限公司 | Aeration type photobioreactor and method of use thereof |
| CN202435923U (en) * | 2011-08-12 | 2012-09-19 | 中国环境科学研究院 | Algae growth enclosure device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109323891A (en) * | 2018-09-30 | 2019-02-12 | 中国科学院东北地理与农业生态研究所 | A method of estimation lake euphotic zone depth |
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