CN102115261B - Purifying functional wetland plant screening pool - Google Patents

Purifying functional wetland plant screening pool Download PDF

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CN102115261B
CN102115261B CN201010623961XA CN201010623961A CN102115261B CN 102115261 B CN102115261 B CN 102115261B CN 201010623961X A CN201010623961X A CN 201010623961XA CN 201010623961 A CN201010623961 A CN 201010623961A CN 102115261 B CN102115261 B CN 102115261B
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planting bed
plant
water
wetland
outlet sump
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崔丽娟
李伟
张曼胤
王义飞
赵欣胜
李胜男
商晓静
张岩
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Research Institute of Forestry New Technology of Chinese Academy of Forestry
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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
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    • Y02A40/00Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
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    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract

The invention belongs to the technical field of ecological engineerings and relates to a purifying functional wetland plant screening pool. The purifying functional wetland plant screening pool comprises a distribution reservoir, at least two planting beds and a discharge bay, wherein the distribution reservoir and the discharge bay are connected with the planting beds respectively through pipelines. The wetland plants or plant compositions are planted in the planting bed, the sewage in the distribution reservoir is discharged into the planting bed, and various indexes of pollutants in the planting bed are determined after a period of time, such as chemical oxygen demand (COD), total nitrogen (TN), total phosphorus (TP) and the like, so that the wetland plants or plant compositions with purifying functions are screened out. The wetland plants with stronger purifying functions are screened through study of purifying effects of different configuration modes of wetland plants under the field natural conditions, so that a scientific basis for water purification for polluted wetlands and restoration of degraded wetlands is provided.

Description

A kind of purification function type wetland plant screening pond
Technical field
The invention belongs to the ecological engineering technology field, relate to a kind of purification function type wetland plant screening pond.
Background technology
Wetland plant plays an important role at aspects such as sewage purifications.Wetland plant is of a great variety, and has stronger region, and different wetland plants have bigger difference to the removal ability of pollution substance.Therefore, screening is fit to growth and the stronger wetland plant of detergent power and is used for that wet land water quality purifies and the water surrounding reparation has important theory and realistic meaning.Chinese scholars utilizes wetland plants such as reed, cattail and wild rice stem to make up the existing many reports of research that artificial swamp is disposed of sewage; Wetland plant has been brought into play crucial effect in artificial swamp; But mostly these plants are herbage, and utilize arbor, shrub very few as the report of constructed wetland plant.
The document the earliest of relevant China wetland plant research is the preliminary observation of Wang Yanjie to the XuanWu Lake, Nanjing plant community, and relating to taxonomic document the earliest is that the Japanese helps the flat nineteen forty-two publication of Teng Run " Manchuria pasture and water collection of illustrative plates ".The mid-80 rises, and China's wetland plant research begins to move towards flourishing.Floristics selects whether appropriately directly to influence the decontamination effect improving of wet land system, and artificial swamp is often selected perennial macrophyte for use.Macrophytic heavy root system has activity throughout the year, not only strengthens organic degraded, and needn't annual plant, and more is prone to adapt to chad matrix habitat; Over-ground part can be grown year after year, has huge living weight and powerful transpiration, is more conducive to pollutant removal.The fundamental principle that wetland plant is selected to follow have the native country plant preferential, increase the species diversity of system, perennial damp tolerant plant, strong stress resistance, root system of plant is flourishing, living weight is big, growth cycle is long, soil removability is strong, landscape effect is good; And have certain economic value etc., pay attention to reasonably combined between species simultaneously.General emergent is suitable for various types of artificial swamps mostly, and floatingleaved plant, pleuston and submerged plant are more suitable in the deep water conditions wetland.In constructed wetland plant kind application facet, all be to be main both at home and abroad with the waterplant type, emergent especially.Foreign experience has mainly been used for reference in the application of wetland plant kind at home, the most frequently used floristics and external basically identical.The wetland plant of studying both at home and abroad mainly contains reed, cattail, paddy rice, reed, wild rice stem, rhizoma scirpi, Scirpus tabernaemontani, Rush, aquatic iris, Canna generalis Bailey, parasol grass, Caulis Miscanthis floriduli, arrowhead, rhizoma alismatis, calamus, sedge, mater convolvulus, Chinese celery, rye grass, Li Shi standing grain, the chrysanthemum fire hose, Herba Eleusines Indicae, water peanut, Herba Eichhorniae, duckweed, watermifoil, eel grass, water caltrop, Chi Shan etc.Wherein the sewage purification ability of reed and wild rice stem is extensively approved, the detergent power of cattail, Canna generalis Bailey etc. remains further to be obtained checking.In the U.S., Lemnaceae is a pleuston commonly used, comprises that Lemna, duckweed belong to and little duckweed belongs to; Water lily and SHILIANHUA are draft class emergents commonly used, and skunk bush and Chinese ilex are shrubs commonly used; Maple and willow are arbors commonly used.
At present, the research of wetland plant wastewater purifying efficiency mainly concentrates on indoor small area research, and the research of shorter mention wetland plant configuring technical.
Summary of the invention
The object of the present invention is to provide a kind of purification function type wetland plant screening pond and use this screening pond and carry out the wetland plant method for screening.
In order to accomplish the object of the invention, a kind of purification function type of the present invention wetland plant screening pond comprises distribution reservoir, at least two planting beds and outlet sump, and distribution reservoir links to each other with planting bed through pipeline respectively with outlet sump.
Wherein, area is identical between described at least two planting beds.
Wherein, and be equipped with switch-valve on the pipeline that distribution reservoir, planting bed or outlet sump link to each other, be used to control the turnover of water.
According to the present invention; The pipeline that described planting bed links to each other with outlet sump is positioned at the bottom of planting bed; Be used for the water of planting bed is imported to outlet sump, the position of preferred outlet sump is lower than the bottom of planting bed, and the water in the planting bed can be imported in the outlet sump through potential energy.
According to the present invention; Lay gravel, cobble or piece stone that the thick particle diameter of 10~20cm is 5-8cm in the planting bed that provides from bottom to up respectively; The particle diameter that 15~25cm is thick is peastone, rubble or sandstone and thick sand, loam or the clay of 5~15cm of 0.5-1cm, and being preferably and laying the thick particle diameter of 15cm from bottom to up respectively is that the thick particle diameter of gravel, 20cm of 5-8cm is peastone and the thick loam of 10cm of 0.5-1cm.
According to the present invention, than high 2~3cm at the bottom of the pond, water side, stop up preventing at the bottom of the feed-water end pond of preferred planting bed.
The present invention also provides and utilizes described purification function type wetland plant screening pond to carry out the method for screening of wetland plant; Comprise with the combined grow of the plant that will screen or plant in the planting bed in described wetland plant screening pond; Sewage in the distribution reservoir is entered in the planting bed; After for some time, measure water in the planting bed the pollutent index, thereby filter out wetland plant or combinations of plant with purification function.
According to the present invention; Can in described distribution reservoir, put into the sewage of any kind of well known in the art; Be used to screen plant or the combinations of plant that the different sorts pollutent is had purification function; Thereby; Can be according to the purpose of screening; Different pollutent index in the water of mensuration planting bed; Described pollutent index can be COD, TN, TP, permanganate index, ammonia nitrogen, dissolved oxygen, five-day BOD, sulfide, salinity, non-ionic ammonia, solvability iron, total manganese, total zinc, selenium, petroleum-type, AS, organochlorine pesticide, benzo (α) pyrene, propenal, benzene class, total organic carbon, nitrate nitrogen, nitrite nitrogen, volatile phenol, prussiate, fluorochemical, vitriol, muriate, sexavalent chrome, coliform, total plate count, chlorophyll a, total mercury, total arsenic, cadmium, lead, copper, silver, total, total beta activity, potassium, sodium, zinc, vitriol, muriate, specific conductivity, total dissolved solid, aggressiveness carbonic acid gas, free carbon dioxide, total alkalinity, carbonate, hydrocarbonate or other are well known in the art, and the normal index of surveying is COD, TN, TP, permanganate index, ammonia nitrogen, dissolved oxygen, five-day BOD etc.
According to the present invention, the wetland plant method for screening that is provided also comprise with the floristics that will screen or floristicly be combined in the Various Seasonal screening, thereby filter out wetland plant with purification function or the combinations of plant that is fit to Various Seasonal.
The present invention is through studying the decontamination effect improving of different wetland plants configuration modes under the natural condition in the open air; The stronger wetland plant of screening detergent power; Advantage is multiple wetland plant or combination concentrated in together carries out related experiment observation; Be convenient to monitoring and management, and external conditions can be guaranteed to keep consistent.Results of screening is science more, and plant that filters out or combinations of plant can directly apply to the purification of water quality of local pollution wetland and the recovery of degeneration wetland.
Description of drawings
Fig. 1 wetland plant screening pond plat.Wherein, A: distribution reservoir, B: outlet sump, C, P: switch-valve, D: caliber 60mm rising pipe, E: cut off F:30mm water distributing pipe, 1~16: planting bed.
The sectional view of the planting bed in Fig. 2 wetland plant screening pond.Wherein, G: reinforced concrete wall, the Steel Concrete bottom surface that H:10mm is thick, I: wetland plant, J: caliber 30mm rising pipe, K: switch-valve, L: water, M: particle diameter 5-8cm gravel, N: particle diameter 0.5-1cm peastone, O: the loam of crossing the 2mm sieve.
The sectional view of the distribution reservoir in Fig. 3 wetland plant screening pond.Wherein, R is a caliber 30mm rising pipe.
The sectional view of the outlet sump in Fig. 4 wetland plant screening pond.
The clearance of Fig. 5 two seasons of autumn in summer different wetland plant growing pond COD.
The clearance of Fig. 6 two seasons of autumn in summer different wetland plant growing pond TN.
The clearance of Fig. 7 two seasons of autumn in summer different wetland plant growing pond TP.
Embodiment
Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
Embodiment 1
Fig. 1 is wetland plant screening of the present invention pond plat; Fig. 2 is the sectional view of the planting bed in the wetland plant screening of the present invention pond; The sectional view of the distribution reservoir in Fig. 3 wetland plant screening of the present invention pond; Fig. 4 is the sectional view of the outlet sump in the wetland plant screening of the present invention pond.
A kind of purification function type wetland plant planting bed, comprising: one of distribution reservoir A, distribution reservoir length are 400: 700: 100cm; Wetland plant planting bed 1~160 six; Each planting bed pond is long: wide: height is 500: 200: 85cm; Fill identical matrix in each wetland plant planting bed, be followed successively by gravel M15cm (particle diameter 5-8cm), peastone N 20cm (particle diameter 0.5-1cm) and silty loam O 10cm (2mm sieves) from bottom to up.The plant growing pond is made up by reinforcing bar water-setting soil P and forms, and laid inside has antiseepage rete (comprise lay in the middle of two ponds with pond at the bottom of), when the wetland plant planting bed makes up at the bottom of the feed-water end pond in each pond than exceeding 3cm at the bottom of the pond, water side, to prevent obstruction; One of outlet sump B, outlet sump length are 390: 350: 100cm.
Wherein the wetland plant planting bed cuts off E each other, and diameter 30mm water distributing pipe F links to each other with planting bed, enters planting bed through the sewage in the switch-valve C control diameter 60mm water inlet pipe D; Diameter 30mm water distributing pipe links to each other with diameter 60mm water inlet pipe D; And diameter 60mm water inlet pipe D links to each other with distribution reservoir, and gets into diameter 60mm water inlet pipe D through the sewage in the switch-valve P control distribution reservoir.Rising pipe R through diameter 30mm links to each other planting bed with outlet sump, and gets into outlet sump through the water in the switch-valve K control planting bed.At the bottom of the feed-water end pond of each planting bed bottom H than exceeding about 2-3cm at the bottom of the pond, water side, to prevent obstruction.
The rising pipe R of diameter 30mm is positioned at the bottom of planting bed, and the upper edge of itself and outlet sump is positioned at sustained height, is used for the water of planting bed is imported to outlet sump through potential energy, directly uses or is used for next step purification.
Embodiment 2
The screening pond screening of application implementation example 1 has the wetland plant or the combinations of plant of purification function, and screening is fit to humidity plant or combinations of plant that Various Seasonal is used to purify.In May, 2009, gather Guanting reservoir shore band size wetland plant uniformly, to plant respectively in the plant growing pond, specific configuration is seen table 1.On June 4th, 2009, sewage is slowly put into planting bed (depth of water 35cm) through distribution reservoir.Because current evenly flow into planting bed through water pipe, sewage flows into through the water distributor that is laid in planting bed, and slowly diafiltration downwards behind the 12h that discharges water, stops water filling.Guarantee that wetland plant has similar growing environment.Discharge from bottom, plant growing pond through the water after the processing of plant growing pond, measure TN, TP, COD in the water after purifying, thereby screen the wetland plant that obtains having purification function.Experimental water is taken from Yanqing County feeding animals liquid dung sewage, and field trial was carried out in June, 2009-November, comprises the injection of sewage and the collection of discharge and water sample, sees table 2 exact date.Wherein, three of repetitions are established in the collection of water sample in every pond.COD (COD), total nitrogen (TN) and total phosphorus (TP) are in the experiment indoor measurement, and COD concentration adopts potassium dichromate process to measure, and TN adopts alkaline alkaline potassium per-sulfate digestion determined by ultraviolet spectrophotometry, and TP concentration adopts the ammonium molybdate spectrophotometry.
Table 1 wetland plant planting bed allocation list
Table 2 test period in 2009
Figure BSA00000414945700062
The different wetland plants of table 3 are to the comparison of pollutants removal rate (%)
Figure BSA00000414945700063
Figure BSA00000414945700071
The result shows; There is not significant difference (P>0.05) in different wetland plants to the decontamination effect improving of COD (COD), and different wetland plants are followed successively by calamus+wild rice stem, wild rice stem, cattail, cattail+Chinese celery, wormwood artemisia willow+Chinese celery, reed+buckbean, cattail+wormwood artemisia willow, false rice+buckbean, reed, iris, cattail+reed, Chinese celery, wormwood artemisia willow, calamus (table 3) from high to low to the decontamination effect improving of COD.
There is not significant difference (P>0.05) in different wetland plants to the decontamination effect improving of TN (total nitrogen), and different wetland plants are followed successively by cattail, calamus+wild rice stem, false rice+buckbean, cattail+Chinese celery, wormwood artemisia willow, iris, Chinese celery, calamus, reed+buckbean, cattail+wormwood artemisia willow, reed, wild rice stem, wormwood artemisia willow+Chinese celery, cattail+reed (table 3) from high to low to the decontamination effect improving of TN.
There is utmost point significant difference (P<0.01) in different wetland plants to the decontamination effect improving of TP (total phosphorus), and different wetland plants are followed successively by iris, false rice+buckbean, wormwood artemisia willow, wild rice stem, wormwood artemisia willow+Chinese celery, cattail, calamus+wild rice stem, Chinese celery, calamus, cattail+reed, reed+buckbean, cattail+wormwood artemisia willow, cattail+Chinese celery, reed (table 3) from high to low to the decontamination effect improving of TP.The result of multiple comparisons shows, there is not significant difference (P>0.05) in 7 kinds of different wetland plant list kinds to the decontamination effect improving of TP; In 7 kinds of different wetland plants configuration, false rice+buckbean is significantly higher than cattail+Chinese celery (P<0.01) to the decontamination effect improving utmost point of TP.See that totally cattail+Chinese celery is then not as good as the single good purification of planting TP of two plants.
Except that there are (P<0.05) the significant difference in reed and two seasons of autumn in calamus summer to the decontamination effect improving of COD, there are not significant difference (P>0.05) in other wetland plants and combination to the decontamination effect improving of COD.Summer, different wetland plants were followed successively by cattail, reed, calamus+wild rice stem, wormwood artemisia willow+Chinese celery, cattail+Chinese celery, wild rice stem, cattail+wormwood artemisia willow, cattail+reed, barnyard grass grass+buckbean, reed+buckbean, Chinese celery, iris, wormwood artemisia willow, calamus from high to low to the decontamination effect improving of COD; Autumn, different wetland plants were followed successively by wild rice stem, calamus+wild rice stem, reed+buckbean, barnyard grass grass+buckbean, iris, wormwood artemisia willow, cattail+Chinese celery, Chinese celery, calamus, cattail+wormwood artemisia willow, wormwood artemisia willow+Chinese celery, cattail+reed, cattail, reed (Fig. 5) from high to low to the decontamination effect improving of COD.
Except that false rice+buckbean, reed+buckbean, cattail+wormwood artemisia willow, cattail, reed, two seasons of autumn in calamus summer the decontamination effect improving to TN have (P<0.05) the significant difference, there is not significant difference (P>0.05) in other wetland plants to the decontamination effect improving of TN.Summer, different wetland plants were followed successively by barnyard grass grass+buckbean, cattail, calamus+wild rice stem, cattail+wormwood artemisia willow, calamus, reed, cattail+Chinese celery, reed+buckbean, iris, wormwood artemisia willow, Chinese celery, wild rice stem, wormwood artemisia willow+Chinese celery, cattail+reed from high to low to the decontamination effect improving of TN; Autumn, different wetland plants were followed successively by calamus+wild rice stem, wormwood artemisia willow, cattail, Chinese celery, cattail+Chinese celery, iris, barnyard grass grass+buckbean, reed+buckbean, calamus, reed, wormwood artemisia willow+Chinese celery, wild rice stem, cattail+reed, cattail+wormwood artemisia willow (Fig. 2) from high to low to the decontamination effect improving of TN.On the whole, 7 kinds of wetland plant list kinds and 7 kinds of wetland plant configurations show as all that to be summer be better than autumn to the removal effect of TN.
In two seasons of autumn in summer, there is not significant difference (P>0.05) in different wetland plant list kinds to the decontamination effect improving of TP; And summer, there was significant difference (P<0.05) in different wetland plants configuration to the decontamination effect improving of TP, and autumn, there was not significant difference (P>0.05) in different wetland plants configuration to the decontamination effect improving of TP.Summer, different wetland plants were followed successively by the decontamination effect improving of TP from high to low: barnyard grass grass+buckbean, wormwood artemisia willow+Chinese celery, wormwood artemisia willow, cattail, iris, Chinese celery, calamus+wild rice stem, wild rice stem, cattail+wormwood artemisia willow, reed+buckbean, calamus, cattail+Chinese celery, reed, cattail+reed; Be followed successively by autumn from high to low: cattail+reed, barnyard grass grass+buckbean, iris, wormwood artemisia willow, calamus, Chinese celery, cattail+Chinese celery, wild rice stem, cattail, reed+buckbean, cattail+wormwood artemisia willow, reed, wormwood artemisia willow+Chinese celery, calamus+wild rice stem (Fig. 3).Remove calamus+wild rice stem, cattail+wormwood artemisia willow, wormwood artemisia willow+two seasons of autumn in the Chinese celery summer decontamination effect improvings to TP and have significant difference (P<0.05), there are not significant difference (P>0.05) in all the other wetland plants and combination to the decontamination effect improving of TP.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from know-why of the present invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.

Claims (3)

1. purification function type wetland plant screening pond comprises distribution reservoir, 1 ~ 16 planting bed and outlet sump, and distribution reservoir links to each other with planting bed through pipeline respectively with outlet sump; Area is identical between the described planting bed; Be equipped with switch-valve on the pipeline that distribution reservoir, planting bed or outlet sump link to each other, be used to control the turnover of water; The pipeline that described planting bed links to each other with outlet sump is positioned at the bottom of planting bed, is used for the water after purifying is imported to outlet sump; The position of said outlet sump is lower than the bottom of planting bed, and the water in the planting bed is imported in the outlet sump through potential energy; Wherein planting bed cuts off (E) each other, and diameter 30mm water distributing pipe (F) links to each other with planting bed, enters planting bed through the sewage in switch-valve (C) the control diameter 60mm water inlet pipe (D); Diameter 30mm water distributing pipe links to each other with diameter 60mm water inlet pipe (D); And diameter 60mm water inlet pipe (D) links to each other with distribution reservoir, and gets into diameter 60mm water inlet pipe (D) through the sewage in switch-valve (P) the control distribution reservoir; Rising pipe through diameter 30mm links to each other planting bed with outlet sump, and gets into outlet sump through the water in switch-valve (K) the control planting bed; The rising pipe of diameter 30mm (R) is positioned at the bottom of planting bed, and the upper edge of itself and outlet sump is positioned at sustained height; The thick particle diameter of gravel, 20cm of all laying the thick particle diameter of 15cm in described each planting bed from bottom to up successively and be 5-8cm is peastone and the thick silty loam of crossing the 2mm sieve of 10cm of 0.5-1cm; Than high 2-3cm at the bottom of the pond, water side, stop up preventing at the bottom of the feed-water end pond of said each planting bed; Said distribution reservoir is long: wide: height is 400:700:100cm; Each planting bed is long: wide: height is 500:200:85cm, is made up by reinforcing bar water-setting soil to form, and laid inside has the antiseepage rete; Outlet sump is long: wide: height is 390:350:100cm.
2. purification function type wetland plant screening method; It is characterized in that; With the combined grow of the plant that will screen or plant in the planting bed in the described wetland plant screening of claim 1 pond, the sewage in the distribution reservoir is entered in the planting bed, after for some time; Measure the pollutants in sewage index after purifying, thereby filter out wetland plant or combinations of plant with purification function.
3. screening method according to claim 2; It is characterized in that; Also comprise according to plant characteristic, with the floristics that will screen or floristicly be combined in the Various Seasonal screening, thereby filter out wetland plant with purification function or the combinations of plant that is fit to Various Seasonal.
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