CN102134140A - Fore-reservoir system driven by natural energy in lake outlet regions - Google Patents

Fore-reservoir system driven by natural energy in lake outlet regions Download PDF

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CN102134140A
CN102134140A CN2010105737694A CN201010573769A CN102134140A CN 102134140 A CN102134140 A CN 102134140A CN 2010105737694 A CN2010105737694 A CN 2010105737694A CN 201010573769 A CN201010573769 A CN 201010573769A CN 102134140 A CN102134140 A CN 102134140A
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district
water
lake
fore
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CN102134140B (en
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张毅敏
晃建颖
高月香
孔祥吉
陈楚星
张永春
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Nanjing Institute of Environmental Sciences MEP
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Nanjing Institute of Environmental Sciences MEP
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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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/33Wastewater or sewage treatment systems using renewable energies using wind energy
    • 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
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00Technologies for wastewater treatment
    • Y02W10/30Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

The invention discloses a fore-reservoir system driven by natural energy in lake outlet regions, belonging to the field of fore-reservoirs. The fore-reservoir system comprises five units: a water diversion storage buffer area, an ecological interception and sedimentation area, an intensifying and purifying area, a deep purification area and an ecological stable area. The fore-reservoir system disclosed by the invention solves the problem of power needed by the water inflow, intensification and purification of reservoir areas by adopting a wind energy and solar energy driving technology and enhances the treatment efficiency of the five units through the link-by-link purification and the step-by-step interception of the five units, thereby achieving the final reduction of pollutants entering lakes; the fore-reservoir system disclosed by the invention can finally realize the target of removing 30 percent of TN (Total Nitrogen), TP (Total Phosphorus) and COD (Chemical Oxygen Demand) loads through the combined action of the five units; most water quality indexes can achieve and be superior to an IV-V class standard of the national surface water environmental quality standard after treatment; outflow water treated by the fore-reservoir system can be used as water for fishery, landscape, agricultural irrigation, and the like; and in addition, the invention can provide a scientific, effective and referable technology for fore-reservoir construction, the reduction of pollution loads entering the lakes and lake eutrophication control in the lake outlet regions.

Description

The prepositive library system that exit of a lake district natural energy source drives
Technical field
The present invention relates to the lake eutrophication Controlling System, the prepositive library system of exit of a lake district natural energy source driving specifically.
Background technology
English pre-dam or the pre-reservoir of claiming in preposition storehouse, from late 1950s, Germany, Denmark, preceding Czech have successively carried out the research of the eutrophication of utilizing preposition storehouse improvement water body and have put into practice (Klaus P ü tz, J ü rgen Benndorf, The importance of pre-reservoirs for the control of eutrophication of reservoirs, Water Science and Technology, 1998,37 (2): 317 – 324).In bridge reservoir and the control of face source, Dian Chi, also used this technology in China, article introduction (Bian Jinzhong etc. are successively arranged, prevent and treat preposition storehouse countermeasure feasibility study in bridge reservoir eutrophication, urban environment and urban ecology, 1994,7(3): 5-9 Yang Wenlong etc., the applied research of preposition storehouse in the control of uncontamination source, Dian Chi, the Yunnan environmental science, 1996,15(4): 8-10.)。
Classical preposition storehouse is to build a dam going into the exit of a lake, builds up the small reservoir that is positioned at main body lake and reservoir upstream, is used to hold back the pollutent that enters the main body reservoir.In domestic and international research in the past, preposition storehouse is arranged on the knob more, utilizes natural gradient, tackle most of silt and N, P nutritive substance effectively, and structure is single, and a retaining reservoir area is only arranged.China is at the existing (Zhang Yimin etc. that use in preposition storehouse, plain river network area, the application of preposition storehouse technology in the control of Taihu Lake basin pollution of area source inquired into, " Environmental Pollution and Control " 2003,25 (6): 342-344, Zhang Yongchun, Zhang Yimin etc., the preposition storehouse technical study " Chinese Water Conservancy " 2006 of plain river network ground area surface source pollution control, 17:14-18), but only be used for pollution of area source control.Because the inconvenience that exit of a lake district special geographical condition and energy source device are installed, good terms of settlement is not arranged in the processing of exit of a lake district pollutent always, before present patent application, do not retrieve going into exit of a lake district and build natural energy source and drive prepositive library system and remove the nitrogen into the lake, the bibliographical information of phosphorus.
Summary of the invention
1, the technical problem that will solve
Enter lake (reservoir) at a large amount of nitrogen, phosphor contaminant through going into the exit of a lake, the eutrophication that causes the lake takes place, and monotechnics was low to efficient on the pollutents such as removal nitrogen, phosphorus in the past, exit of a lake district is many spacious open-air in addition, electric power is supplied with very difficult, problems such as system dynamic can't solve the invention provides the nitrogen of exit of a lake district, plain river network area natural energy source driving, preposition storehouse technology and the construction process thereof that phosphorus nutrition salt is removed.Drive the reservoir area current by windmill water pumping, overcome the less preposition storehouse water body mobile hydromechanics shortcoming that is unfavorable for of plains region river fall; The present invention stablizes integrated existing technology such as control region by making up the three grades of purifying areas in preposition storehouse with ecology, effectively improve the processing efficiency of system; At the natural present situation in present China exit of a lake district, power supply is very difficult, can't drive system move, and adopts natural energy sources such as wind energy, sun power.Use range of the present invention is wide, and treatment effect is stable, can remove simultaneously into pollution substances such as the nitrogen in lake and phosphorus, and promote lake body water correction.
2, technical scheme
The prepositive library system that exit of a lake district natural energy source drives is made of 5 unit: the diversion buffer zone of regulating and storing, ecological intercepting and negative area, strengthened purification district, deep purifying district and ecological stable region.
By each unitary organically combination, interception step by step, the ring ring purifies, and realizes best decontamination effect improving.The area of prepositive library system of the present invention can design according to the amount of going into the lake pollutent, and area should be not less than (the 4000m of 40m * 100m) 2, storage capacity is not less than and is 6000m 3Preposition storehouse hydraulic load is 0.1-0.5m 3/ m 2/ d.Reservoir area water surface shape is preferably rectangle or circle; Preposition storehouse can form with soil property dykes and dams cofferdam, also can reinforced concrete or brick mix structure and form.
Each is unitary specifically composed as follows in the prepositive library system that exit of a lake district natural energy source drives:
(1) the diversion buffer zone of regulating and storing, at plain river network area water drop features of smaller, the present invention adopts the windmill water lift with wind energy as energy derive, utilize wind energy to cause the buffer zone of regulating and storing (being high-order water distributing area) of reservoir area river, form the height of water, guarantee carrying out smoothly of subsequent treatment process, promptly carry out the ecological purification effect of next stage by the gravitional force of water lift.Go into exit of a lake multidigit near open water, the wind resource abundance can be brought into play its characteristics and utilize wind energy, and power is provided.
Diversion regulate and store the district projected depth be 2-3m; Design water surface control absolute altitude should be higher than ingoing river lowest water level 1.5-3m for many years; Design area generally accounts for the total water surface area about 10% in preposition storehouse, avoids dead angle area; Ecological intercepting and negative area water distribution can adopt pipeline water distribution and two kinds of forms of overflow water distribution downstream.
(2), ecological intercepting and negative area, the ecological intercepting negative area is by the high-density planting reed, emergents such as cattail, form the interception barrier, the particulate pollutant that carries in the interception river, the nutritive salt such as nitrogen, phosphorus of part are removed in the nitrated denitrification of absorption, absorption and microorganism by plant simultaneously.
The design area of ecological intercepting and negative area should account for the total water surface area about 10% in reservoir area, and projected depth is 0.4-0.7m; The emergent planting density is 15-25 strain/m 2, vegetation coverage is more than 80%.
(3) strengthened purification district, strengthened purification district are most important parts in the whole purification process.Ecological training wall is set, increases the processing residence time of water body, lay pleuston district and emergent district.Arrange Herba Eichhorniae, water chestnut in the pleuston district, the floating plant growth is rapid, and its decontamination effect improving to nitrogen phosphorus is better; In the emergent district, arrange view emergent lotus, power flower etc. again, further remove nitrogen phosphorus; Arrange the water body watercourse aeration equipment of Driven by Solar Energy simultaneously, strengthen DO content in the water, promote the metabolism of aerobic microbiological, thereby remove nitrogen, phosphorus in the water efficiently.
Pleuston district projected depth is 1.0-2.0m in the strengthened purification district, and the emergent district depth of water is 0.4-0.7m; Area accounts for the total water surface area in preposition storehouse 30% and is advisable, and the emergent planting density is 10 strains/m 2About, kinds of planting is lotus, power flower, mullet grass etc. again, vegetation coverage 30%-50% is advisable; The pleuston planting density is 10 strains/m 2, vegetation coverage 50%-80% is advisable;
(4) deep purifying district, the main stereo ecological floating bed of laying in the deep purifying district, the stereo ecological floating bed is to be made of floating bed, waterplant, compounded mix, attached microbial.Mainly by Siberian iris, aquatic Canna generalis Bailey, parasol grass, swamp cabbage reasonable disposition, Siberian iris winter hardiness is stronger for waterplant, and view is better, and the ability that purifies absorbed nitrogen phosphorus is also higher.Purification of water quality ability and the landscape value of parasol grass, Canna generalis Bailey are higher; The detergent power and the economic worth of swamp cabbage are higher.Attached microbial is the action of microorganisms of relying in the compounded mix efficiently concentrating water body, and N, P in the water body are had better removal effect.By hydrobiological acting in conjunction, further reduce Pollutant levels in the water inlet, improve water quality.
Deep purifying district projected depth is 1.5-2.0m, and area accounts for the total water surface area in preposition storehouse 20% and is advisable; The floating bed fraction of coverage is 10-20%; The floating bed plant planting density is 9-18 strain/m 2
(5) ecological stable region, ecological stable region are last links of preposition storehouse technical process, play auxiliary cleaning action.The river that enters the reservoir area is through behind interception, sedimentation and the deep purifying, and water quality is significantly improved, and particularly transparency will promote greatly, for primary condition has been created in the growth of submerged plant.Therefore, at this area arrangements submerged plant, fish and zoobenthos, the ecosystem of Primary Construction health.By interbiotic mutualism, accelerate the lake ecological recovering process, improve the stability of lake ecosystem.Put filter-feeding fish silver carp, bighead in a suitable place to breed, can reduce the biomass of plant plankton, change the structure of community and the metabolism intensity of system.Stocked carp in ecological stable region, and control its rational breeding density, can play the good control effect to planktonic biomass in the water body, the small-sized stability of ecosystem of balance is improved water quality.The water outlet effect of assurance system.
The ecological stable region depth of water is advisable with 0.5-1.5m, and area accounts for 30% of the preposition storehouse water surface total area and is advisable; The submerged plant planting density is 1-5 strain/m 2, rate of vegetation 20%-40%; Throw in filter-feeding fish 1-5 tail/m such as silver carp, bighead 2, bivalves and snail 5kg/100m 2Be advisable.
3, beneficial effect
The present invention adopts wind energy and solar energy source actuation techniques to solve the water inlet and the needed dynamical problem of strengthened purification of reservoir area, purifies, tackles step by step by 5 unitary ring rings, improves its processing efficiency, reaches the reduction of finally going into the lake pollutent.The preposition storehouse of lake inlet mouth adopts wind energy to drive diversion, add the solar energy aeration reoxygenation,, remove nutritive salt, suspended solids and the organic pollutants such as N, P in lake according to mechanism such as physics sedimentation and waterplant, microbially decontaminates, reduce and go into the lake pollution loading amount, effectively control the eutrophication in lake.By 5 unitary combined action, finally can realize removing the target of TN, TP, COD load 30%, most of after treatment water-quality guideline can reach and be better than the IV-V class standard in the national water environment quality standard (GB2002-3838).Water outlet after system handles can be used for fishery, view, agricultural irrigation water etc.The present invention can be to the preposition storehouse construction of exit of a lake district, go into that the lake pollution load is cut down, lake eutrophication control provides science, effectively can be for the technology of using for reference.
Description of drawings
Fig. 1 is the structural representation in preposition storehouse, exit of a lake district.
Embodiment
Further specify the present invention below in conjunction with drawings and Examples.
Embodiment 1:
Carry out the exit of a lake district prepositive library system structure engineering that wind energy drives in exit of a lake district, somewhere, southern Jiangsu.This lake enters a large amount of nitrogen and phosphorous nutrients by exit of a lake district, causes the lake water quality deterioration.This preset storehouse engineering adopts the windmill water lift, and the design hydraulic load is 0.20 m 3/ m 2/ d, preposition storehouse water surface area is designed to 1250m 2The volume of this preset storehouse engineering is 1520m 3, flooding quantity is 250m 3/ d, hydraulic detention time are 6d.Engineering adopts brick to mix structure, cuts off mutually between each zone, and links up with pvc pipe.
(1) the diversion district that regulates and stores: area is 20m * 5m=100m 2, water (flow) direction is parallel with the 20m edge direction, accounts for the preposition storehouse total area 8%, projected depth 2m; Windmill water lift amount average out to 250m 3/ d; The diversion control region is communicated with next unit with the pvc pipe water distribution of 5 DN20.
(2) ecological intercepting and negative area: area is 20m * 5m=100m 2, water (flow) direction is parallel with the 20m edge direction, accounts for 8% of the preposition storehouse total area; Projected depth is 0.5m, and the former depth of water of cement pit is 1m, the earth of upper strata place mat 50cm; Emergent plantation calamus in the district, planting density is 20 strains/m 2Local area is communicated with the pvc pipe of next unit with 5 DN20.
(3) strengthened purification district: area is 10m * 40m=400m 2, water (flow) direction is parallel with the 40m edge direction, accounts for 32% of the preposition storehouse total area; The emergent district depth of water of forebody 10m * 20m is 0.4m, and the plantation plant is a lotus, the power flower is with the 1:1 miscegenation again; The pleuston district projected depth of latter half of 10m * 20m is 1.5m, and plant growing Wei Da Piao makes with fishing net and to enclose lattice and limit its malignancy; Local area is communicated with the pvc pipe of next unit with 5 DN20.
(4) deep purifying district: area is 10m * 30m=300m 2, accounting for 24% of the preposition storehouse total area, water (flow) direction is parallel with the 30m edge direction; Projected depth is 2.0m; Three-dimensional floating bed water surface fraction of coverage is 20%; Floating bed plant be parasol grass and aquatic Canna generalis Bailey with 1:1 ratio miscegenation, planting density is 9 strains/m 2With the matrix of combined stuffing as the enrichment settled organism; Local area is communicated with the pvc pipe of next unit with 5 DN20.
(5) ecological stable region: area is 10m * 35m=350m 2, accounting for 28% of preposition storehouse water surface area, water (flow) direction is square parallel with the 35m limit; The design average depth is 0.83m, and average depth is 0.5m, plants the planting submerged plant eel grass, and planting density is 3 clumps/m 2Local area is last functional zone, preposition storehouse, and the water body after purifying in the reservoir area is discharged in the overflow mode.
Water outlet after native system is handled, main conventional water-quality guideline all has improvement, sees the following form.
Water-quality guideline TN TP NH3-N Permanganate index
Influent concentration/mg.L -1 3.34±0.55 0.165±0.075 1.34±0.59 5.80±0.84
The influent quality grade Bad V
Go out water concentration/mg.L -1 2.34±0.73 0.092±0.062 0.57±0.21 4.02±0.85
The effluent quality grade Bad V
Average removal rate/% 30.0% 44.2% 57.5% 30.7%
Embodiment 2:
Carry out the exit of a lake district preset storehouse engineering that natural energy source drives in exit of a lake district, somewhere, southern Jiangsu.It is a major cause of this lake eutrophication that exit of a lake district enters a large amount of nutritive substances such as nitrogen phosphorus in lake.This preset storehouse engineering adopts the windmill water lift, and the design hydraulic load is 0.40 m 3/ m 2/ d, preposition storehouse water surface area is 10000m 2, volume is 13750m 3, flooding quantity is 4000m 3/ d, hydraulic detention time are 3.4d.Preposition storehouse main construction is a soil property structure, is shaped as approximate rectangle, cuts off with the soil property cofferdam between each zone, regulates and stores the district except that diversion, all links up each purifying area so that fracture to be set on the cofferdam.
(1) the diversion district that regulates and stores: area 50 * 20=1000m 2, water (flow) direction is parallel with the 50m edge direction, accounts for 10% of the preposition storehouse total area, projected depth 2.5m; Windmill water lift height is 2m, water lift amount average out to 4000m 3/ d; Diversion control region and next unit are cut off by an overfall dike, and water enters next unit from the overflow of overfall dike top.
(2) ecological intercepting and negative area: area 50 * 20=1000m 2, water (flow) direction is parallel with the 50m edge direction, accounts for 10% of the preposition storehouse total area; Projected depth is 0.5m, emergent plantation calamus in the district, and planting density is 20 strains/m 2, water surface fraction of coverage 90%;
(3) strengthened purification district: area is 60m * 50m=3000m 2, in the district, training wall being set every 20m, the training wall direction is parallel with the 50m limit, and current are circuitous mobile along the 50m limit in the strengthened purification district; Training wall width at dam crest 1m, the water surface is contour in height and the preposition storehouse, dam crest plantation emergent reed; 50 * 20=1000m2 gallery of forebody is the pleuston district, and projected depth is 1.5m, and plant growing Wei Da Piao makes with fishing net and to enclose lattice and limit its malignancy; Two 50m in rear portion * 20m=1000m2 gallery is the emergent district, and the depth of water is 0.5m, and the plantation plant is a lotus, the power flower is with the 1:1 miscegenation again; The local area average depth is 1.25m, and waterplant water surface fraction of coverage is 50%.
(4) deep purifying district: area is 100m * 20m=2000m 2, accounting for 20% of the preposition storehouse total area, water (flow) direction is parallel with the 100m edge direction; Projected depth is 2.0m; Three-dimensional floating bed water surface fraction of coverage is 20%, and floating bed was arranged on aquaporin central authorities, floating bed plant be parasol grass and aquatic Canna generalis Bailey with 1:1 ratio miscegenation, planting density is 9 strains/m 2With the matrix of combined stuffing as the enrichment settled organism.
(5) ecological stable region: area is 50m * 60m=3000m 2, account for 30% of preposition storehouse water surface area; The design average depth is 0.5m, plants the planting submerged plant eel grass, and planting density is 3 clumps/m 2Silver carp, each 1000 tail of bighead are thrown in ecological stable region, ring rib spiral shell 20kg; Ecological stable region is provided with the water outlet overfall dike, and current are from overfall dike top outflow system.
Purify later water outlet through this engineering, main conventional water-quality guideline all improves, and load has obtained reduction.Specifically see the following form.
Water-quality guideline TN TP NH3-N Permanganate index
Influent concentration/mg.L -1 4.28±0.65 0.234±0.894 2.53±0.87 6.37±0.67
The influent quality grade Bad V
Go out water concentration/mg.L -1 2.96±0.74 0.124±0.908 0.68±0.43 4.27±0.97
The effluent quality grade Bad V
Average removal rate/% 30.8% 47.0% 73.1% 33.0%

Claims (5)

1. the prepositive library system that drives of exit of a lake district natural energy source is characterized in that being made of 5 unit: the diversion buffer zone of regulating and storing, ecological intercepting and negative area, strengthened purification district, deep purifying district and ecological stable region.
2. the prepositive library system that the exit of a lake according to claim 1 district natural energy source drives is characterized in that the area of this prepositive library system can design according to the amount of going into the lake pollutent, and area should be not less than 40m * 100m, and storage capacity is not less than and is 6000m 3
3. the prepositive library system that the exit of a lake according to claim 2 district natural energy source drives is characterized in that:
(1) the diversion buffer zone of regulating and storing, area is advisable to be not less than 40m * 10m, and the windmill water lift utilizes wind energy to cause the buffer zone of regulating and storing of reservoir area river, forms the height of water;
(2) ecological intercepting and negative area, area is advisable to be not less than 40m * 20m, and ecological intercepting district high-density planting emergent forms the interception barrier;
(3) strengthened purification district, area is advisable to be not less than 40m * 40m, and ecological training wall is set, and increases the processing residence time of water body, lays the pleuston district, sets up solar energy aeration equipment;
(4) deep purifying district, area is advisable to be not less than 40m * 20m, lays the stereo ecological floating bed in the deep purifying district, and the stereo ecological floating bed is to be made of floating bed, waterplant, compounded mix and attached microbial;
(5) ecological stable region, area is advisable to be not less than 40m * 10m, arranges submerged plant, fish and zoobenthos.
4. the prepositive library system that the exit of a lake according to claim 3 district natural energy source drives is characterized in that the diversion buffer zone water lift of regulating and storing adopts natural wind energy resources.
5. the prepositive library system that drives according to each described exit of a lake district natural energy source in the claim 1~4, it is characterized in that the waterplant in the deep purifying district stereo ecological floating bed mainly is made of Siberian iris, aquatic Canna generalis Bailey, parasol grass and swamp cabbage, the reoxygenation aerating apparatus is set, and device drives with natural light source of solar energy.
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CN102976494A (en) * 2012-12-06 2013-03-20 东南大学 Multi-habitat ecological pond system
CN103214143A (en) * 2013-03-21 2013-07-24 杭州天凯生物科技有限公司 High efficiency combined restoration technology for urban river water bodies
CN103626355B (en) * 2013-07-02 2014-12-10 江苏中宜环科水体修复有限公司 Composite unit for restoration of landscape water body
CN103626355A (en) * 2013-07-02 2014-03-12 江苏中宜环科水体修复有限公司 Composite unit for restoration of landscape water body
CN103924551B (en) * 2014-04-25 2016-06-15 环境保护部南京环境科学研究所 A kind of with the landscape integrated front damming process system for feature
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CN103924551A (en) * 2014-04-25 2014-07-16 环境保护部南京环境科学研究所 Pre-dam processing system characterized in landscape integration
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