CN101514053B - Eutrophication water body artificial wetland processing system taking steel-making waste residue as a substrate - Google Patents
Eutrophication water body artificial wetland processing system taking steel-making waste residue as a substrate Download PDFInfo
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- CN101514053B CN101514053B CN200910047797XA CN200910047797A CN101514053B CN 101514053 B CN101514053 B CN 101514053B CN 200910047797X A CN200910047797X A CN 200910047797XA CN 200910047797 A CN200910047797 A CN 200910047797A CN 101514053 B CN101514053 B CN 101514053B
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- 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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention belongs to the environmental protection technical field, in particular to an eutrophication water body artificial wetland processing system taking steel-making waste residue as a substrate. The system adopts a horizontal subsurface flow artificial wetland mode and comprises an artificial wetland cell body, a substrate layer, a wetland botanical system and a water distribution system. The water distribution system comprises water distribution pipes, a gravel water distribution region, a gravel exhalant region and a water outlet channel. The substrate layer is arranged in the artificial wetland cell body. Two sides of the substrate layer are respectively the gravel water distribution region and the gravel exhalant region. The upper part of the substrate layer is paved with a covering layer. The surface of the covering layer is a wetland botanical system. One side of the gravel water distribution region is provided with the water distribution pipes. The gravel exhalant region is connected with the water outlet channel. The matrix material of the substrate layer adopts the mixture of steel slag and dry residue, the volume ratio of which is 4:4-6:1. The processing system is particularly suitable for the purification and restoration of water body with high turbidity, high N and P eutrophication in villages and small towns. Experiments prove that after contaminated cultivation and landscape water body is treated by the processing system; effluent quality basically meets the water standard of national surface water grade III, and even meets the water standard of national surface water grade II in some months; the removal rates of the TP and SS are both more than 90%; the removal rate of NH4<+>-N is also more than 80%.
Description
Technical field
The invention belongs to water-treatment technology field, be specifically related to a kind of with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix.
Background technology
(Constructed Wetlands, CWs) treatment effect is good because of having, construction and working cost are low, be easy to advantages such as maintenance management, thereby is subjected to the generally attention of countries in the world, becomes a kind of faster sewage disposal new technology of development in recent years for artificial swamp.As a kind of novel polluted-water ecological reestablishment, in administering, eutrophication water is used widely at present.Aspect treatment process, also reach its maturity existing a large amount of patent application and the mandates of this respect at present.Matrix (filler) is the important component part of artificial swamp, for wetland plant, microorganism provide growing environment, self also participates in the physical and chemical process of artificial wetland purification sewage, particularly important effect is being brought into play in the absorption of phosphorus, and phosphorus is the restricted factor of natural water eutrophication.So, select which kind of material as artificial swamp matrix, directly determine the dephosphorization removing nitric efficiency of treatment system, thereby influence its repairing effect therefore have crucial meaning to aquaculture water.
Artificial swamp matrix is many based on traditional soil, sand, gravel etc. at present, but because these material absorption properties are relatively poor, artificial swamp is after the operation several years, matrix reaches capacity gradually to the absorption of phosphorus, it is removed efficient and begins to descend, sometimes even matrix occurs and in water body, discharge the phenomenon of phosphorus, thus have influence on the continual and steady treatment effect of whole artificial wet land system.Though, in laboratory and lab scale research, utilize the high-efficiency artificial adsorbing base at present, as haydite, modified zeolite, gac etc., substitute traditional artificial swamp matrix, carry out cleaning test, and obtained treatment effect preferably.But, because these substrate material costs are higher, also are difficult in and carry out large-area promotion and application in the actual engineering, particularly, be difficult to promotion and application more in the relatively backward Rural areas of China's economy.
Slag and dried slag are Steel Plant's steel melting furnace waste residues, mainly as material of construction and road foundation, still, the slag that Steel Plant produce every day, particularly the slag amount is big, effective rate of utilization is not high, and tradition utilizes the mode added value also lower, so be badly in need of opening up the new approach that utilizes.We have carried out the absorption property comparison test to 6 kinds of artificial swamp matrix commonly used at present, discover that 6 kinds of matrix suction phosphorus abilities are followed successively by: slag＞dried slag＞zeolite＞haydites of book structure＞gravel rhombspar＞slag, slag is 3.55 * 10 to the theoretical saturated extent of adsorption of phosphorus
4Mg/kg is 310 times of common gravel.This mainly is because slag and dried slag have the chemical constitution characteristic of high oxidation calcium, aluminum oxide and ferric oxide.In recent years relevant, begun both at home and abroad slag is carried out sewage disposal research as artificial swamp matrix, and obtained achievement in research preferably.But present correlative study still rests on breadboard simulation test, and the case that slag and dried slag are applied to actual polluted-water recovery project is had not yet to see report.In addition, according to us at present studies show that of the fashionable experiment of Chongming Island base, because slag material alkalescence strong (pH=9～12), fully with slag effect artificial swamp matrix, can cause water outlet pH to raise, but also can suppress wet land system implants and microbial growth.In order to overcome this defective, in the artificial swamp building process, we mix filling (dried slag pH=8～10) with two kinds of main slag-slags of steelmaking process kind and dried slag at novelty.Simultaneously, in artificial swamp water flow mode and wetland plant apolegamy, optimize and revise, stable Wetlands ecosystems and lasting decontamination effect improving are loaded, kept to the processed in units that so not only can improve system, can also reduce the artificial swamp construction cost greatly simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix.
The present invention propose with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix, adopt the horizontal drowned flow artificial wet land pattern, form by artificial swamp pond body 1, hypothallus 2, wetland plant system 4 and water distribution system, its structure is as shown in Figure 1.Water distribution system is by water distributing pipe 5, rubble water distributing area 6, rubble exhalant region 7 and go out water channel 8 and form, hypothallus 2 is positioned at artificial swamp pond body 1, the both sides of hypothallus 2 are respectively rubble water distributing area 6 and rubble exhalant region 7, tectum 3 is laid on hypothallus 2 tops, and the surface of tectum 3 is wetland plant systems 4; Rubble water distributing area 6 one sides are provided with water distributing pipe 5, and rubble exhalant region 7 connects water channel 8; The substrate material of hypothallus 2 adopts slag and dried slag mixture, and the volume ratio of slag and dried slag is 4: 1～6: 1.
Among the present invention, the thickness of hypothallus 2 is generally 800～1500mm, and concrete thickness will depend on the size of wetland pond body and handle pollution load.In order to help surviving of wetland plant and growing of root system, the thickness of tectum 3 is 100～150mm, and its material can be that general soil or particle diameter are the rubble of 5～15mm.
Among the present invention, described artificial swamp pond body 1 can adopt high-strength PVC plate or concrete structure, and the long-width ratio of artificial swamp pond body 1 is 4: 1～8: 1, and its area size depends on handles pollution load and available land area.
Among the present invention, the substrate material of hypothallus 2 adopts copper smelter slag slag and dried slag mixture, and slag will suitably wash processing before use, to reduce its pH.Generally are advisable with 5～15mm in slag and dried slag particle footpath.
The slag material of considering among the present invention to be adopted, the more traditional substrate material of its alkalescence is eager to excel, so when selecting wetland plant, except satisfying as the constructed wetland plant basic demand, also should have certain adaptability to alkaline environment.On the basis of potted plant experiment in early stage, among the present invention, select the south growth of suitable China, simultaneously to have 5 kinds of wetland plants of certain resistance than the strong basicity environment.The wetland plant of selecting among the present invention is respectively reed, Rush, calamus, Canna generalis Bailey and parasol grass.In addition, for high efficiency and the stability that improves whole wet land treating system, among the present invention, two kinds and two or more wetland plant are carried out companion planting, to make up richness and the high constructed wetland plant system 4 of species diversity.
Among the present invention, the artificial swamp water distribution system is divided into water distributing pipe 5, rubble water distributing area 6, rubble exhalant region 7, water outlet tracery wall and goes out water channel 8.Consider that artificial wetland effluent pH value may be higher, so among the present invention, rubble exhalant region 7 can suitably increase water route, and then a shock absorption is played in higher artificial wet land system water outlet to the pH value.
Further, concrete treatment system is expressed as:
With the contaminated water body in villages and small towns (as culturing the fish pond, eutrophication river course etc.), enter the artificial wet land system that constitutes by slag and dried slag matrix of above structure in the mode of horizontal drowned flow by water distribution system, sewage is in the artificial wet land system horizontal flow, and utilize adsorption and a series of Biochemical processes such as microbiological deterioration and plant absorbing of slag and dried slag matrix in the constructed artificial wet land system, realize N, P in the polluted-water and organic removal.After the artificial wet land system processing, water outlet is returned and is discharged to contaminated water body or reuse, thereby reaches the reparation purpose to polluted-water.Whole artificial wet land system is provided with valve and under meter, with dominant discharge, keeps system's water-in and water-out stable.
Owing to adopted technique scheme, the present invention has the following advantages:
1, based on the chemical constitution feature and the vesicular structure of slag and dried slag, among the present invention, adopts steel-making waste residue (slag and dried slag), can obviously strengthen matrix phosphor in sewage, NH as the artificial swamp filler
4 +The absorption fixed action of-N and suspended substance adds that the porous structure also helps adhering to of microorganism and grows, and helps organic Degradation.So, replace traditional material as artificial swamp matrix with steel-making waste residue, can strengthen purification and the remediation efficiency of artificial wet land system greatly to polluted-water.
2, owing to adopt stronger slag of adsorptive power and dried slag as the artificial swamp substrate material, add the Design Mode that adopts horizontal drowned flow artificial wet land in this programme, unit surface is handled load greatly, make up the shared land area of artificial swamp thereby reduced, this has more promotion and application for China's land resources southern area villages and small towns in short supply and is worth.Simultaneously, owing to adopted the steel-making waste residue material, also saved the construction cost of artificial swamp greatly, and realized the high-efficiency resource recycling of iron and steel enterprise's solid waste.
3, among the present invention, select that the root system secretion capacity is strong, the plant of good stress resistance is as constructed wetland plant, can utilize the organic acid of plant root exudation to slow down environment pH rising problem in the system that the invar slag causes greatly like this.Simultaneously, adopt multiple wetland plant companion planting pattern, so not only can strengthen the impact resistance of artificial wet land system, improve the high efficiency and the stability of treatment system, can also promote the landscape effect of artificial swamp simultaneously.
4, owing to adopt above method, constructed artificial wet land treating system will be stable, and operational management is easy.Because this province of artificial swamp running cost is lower, add that the full amount of slag matrix absorption is big, the cycle is long, so, more common matrix wetland, parallel-adder settle-out time is long, need not frequently to change matrix, so also greatly reduce the operation and the handling cost of artificial wet land treating system.
Description of drawings
Fig. 1 is that slag and dried slag matrix artificial wet land treating system make up synoptic diagram.
Number in the figure: 1 is artificial swamp pond body; 2 is hypothallus; 3 is tectum; 4 is the wetland plant system; 5 is water distributing pipe; 6 is the rubble water distributing area; 7 is the rubble exhalant region; 8 for going out water channel.
Embodiment
Below by embodiment the present invention is described in further detail:
Embodiment 1:
Testing apparatus is made up of A, B two cover horizontal drowned flow wet land systems, and artificial swamp pond body 1 is welded by the PVC plastic plate.Artificial swamp pond body 1 volume is 0.64m
3(2.0m * 0.4m * 0.8m), respectively there is rubble water distributing area 5 and the rubble exhalant region 7 of a long respectively 15cm and 25cm at two ends, lay 9 thief hatchs in the device side simultaneously.Hypothallus 2 adopts slag and the dried slag mixing material of particle diameter 5～15mm, and slag and dried slag volume ratio are 4: 1, and filling thickness is 55cm.The upper strata covers the rubble of 5～8mm as tectum 3.Artificial wet land system A kind is planted single wetland plant cattail (Typhaangustifolia) as wetland plant system 4; Artificial wet land system B adopts cattail (Typha angustifolia) and cyperus alternifolius (Cyperous alternifolius) mixed planting pattern as wetland plant system 4.Two cover artificial wet land system plant growing density are 20 strains/m
2, spacing is 20cm.The unified peristaltic pump that uses is intake, and water is horizontal flow therein, ordinary water level 60cm.Handle load and be 0.10m/d, the theoretical residence time is 72h.
This example is taken near certain breed fish pond, water surrounding experiment base, each index mean value: COD for the water inlet of examination
Cr: 123.6mgL
-14.65mgL
-1NH
4 +-N:0.54mgL
-1TP:1.15mgL
-1Chla:156.8mgm
-3, (weight) eutrophication state during its water quality is in basically.After the 2 cover slag artificial wet land system steady runnings, stable effluent quality reaches the standard of ground Table III class water, and its average removal rate is respectively: COD
Cr89.6% (A) and 91.7 (B), TN81.9% (A) and 83.7% (B), NH
4 +-N 81.6% (A) and 86.8% (B); TP 95.4% (A) and 92.8% (B).Compare by 2 cover slag artificial swamp treatment effects, artificial wet land system (B) treatment effect of cattail (Typha angustifolia) and cyperus alternifolius (Cyperous alternifolius) companion planting is a little more than single kind of plant artificial wet land system (A).2 cover artificial wet land system water outlet pH raise all to some extent, but all belong to acceptable scope.Compare, artificial wet land system B water outlet pH is starkly lower than artificial wet land system A, illustrates that different artificial swamp companion plantings have cushioning effect preferably to the pH rising that slag causes.
Embodiment 2:
Experiment place: certain water surrounding reparation experiment base, Village Vanguard, county.
Process object: Village Vanguard landscape water body (lake, center), because the development of local agritourism is rapidly, and have or not sewage treatment facility, directly be discharged in the water body so sanitary sewage is unprocessed in a large number, cause the center Lake Water Body to present heavy nutritional status.Particularly organic matter and total phosphorous are higher in the water body.
The structure of artificial wet land treating system: artificial swamp pond body 1 is to be formed by depleted greenhouse aquatic products fishpond (brick mix structure) transformation.The length of artificial swamp pond body 1 and the wide 50m * 8.5m that is respectively.Adopt horizontal drowned flow artificial wet land (HFs) structure pattern.With particle diameter be 5～15mm slag and dried slag after the clear water soaking flushing, carry out uniform mixing with 6: 1 volume ratios, insert then in the artificial swamp pond body 1, hypothallus 2 filling thickness are 800mm, the top layer covers the metalling of 3～5mm again as tectum 3.The artificial swamp front end is provided with that 1.2m is long, particle diameter 40～80 is rubble water distributing area 6, and the rear end is provided with then that 2.0m is long, particle diameter is 15～30 rubble exhalant region 7.Plant adopts strong stress resistance, parasol grass that landscape effect is good, calamus, Rush as wetland plant system 4, and carries out companion planting, to improve the species diversity and the stability of wet land system.Whole slag horizontal-flow wetland system loading 0.3m/d handles the about 150m of the water yield
3/ d, about 25.5h of the residence time;
After building up, through after the trial run of nearly two months (2007.03.18-2007.4.30), stable effluent quality.With year December in May, 2007 to 2007 experimental data be example, entire treatment technology has been carried out the removal effect assessment.In this stage, influent quality: CODcr 30.2～65.4mg/L; TN 1.26～5.81mg/L; NH
4 +-N 0.38～1.24mg/L; TP0.14～0.31mg/L.From influent quality as can be seen, according to country " water environment quality standard (GB3838-2002) ", water base of landscape lake for examination belongs to the V class, and in 5-10 month, belong to bad V class water body, particularly COD and ammonia nitrogen exceed standard seriously, and water pollution is serious, and comparatively serious wawter bloom phenomenon has all taken place in June, 2007 and October.Effluent quality: pH 7.9～8.6 after treatment; COD
Cr9.5～21.4mg/L; TN 0.15～0.92mg/L; NH
4 +-N0.08～0.85mg/L; TP 0.02～0.08mg/L.Its average removal rate is respectively: COD
Cr71-85%, average out to 76.2%; TN 62-78%, average out to 71.4%; NH
4 +-N 69-83%, average out to 80.4%; TP 91-97%, average out to 91.7%.Water outlet pH water inlet rises to some extent, but still is in normal range.On the whole, constructed slag artificial wet land treating system effluent quality satisfies national surface water III class water quality standard (remove July especially) substantially, some in month effluent quality even meet national surface water II class water quality standard.
Claims (6)
1. one kind with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix, adopt the horizontal drowned flow artificial wet land pattern, by artificial swamp pond body (1), hypothallus (2), wetland plant system (4) and water distribution system are formed, it is characterized in that water distribution system is by water distributing pipe (5), rubble water distributing area (6), rubble exhalant region (7) and go out water channel (8) and form, hypothallus (2) is positioned at artificial swamp pond body (1), the both sides of hypothallus (2) are respectively rubble water distributing area (6) and rubble exhalant region (7), tectum (3) is laid on hypothallus (2) top, and the surface of tectum (3) is wetland plant system (4); Rubble water distributing area (6) one sides are provided with water distributing pipe (5), and rubble exhalant region (7) connects water channel (8); The substrate material of hypothallus (2) adopts slag and dried slag mixture, and the volume ratio of slag and dried slag is 4: 1～6: 1.
2. according to claim 1 with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix, the thickness that it is characterized in that hypothallus (2) is 800～1500mm, and the thickness of tectum (3) is 100～150mm.
3. according to claim 1 with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix, it is characterized in that it is the rubble of 5～15mm that tectum (3) adopts soil or particle diameter.
4. according to claim 1 with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix, it is characterized in that described artificial swamp pond body (1) adopts high-strength PVC plate or concrete structure, the long-width ratio of artificial swamp pond body (1) is 4: 1～8: 1.
5. according to claim 1 with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix, the substrate material that it is characterized in that hypothallus (2) adopts copper smelter slag slag and dried slag mixture, slag will wash processing before use, and slag and dried slag particle directly are 5～15mm.
6. according to claim 1 with the eutrophication water body artificial wetland processing system of steel-making waste residue as matrix, it is characterized in that wetland plant system (4) adopts in reed, Rush, calamus, Canna generalis Bailey or the parasol grass one to several.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101805062B (en) * | 2010-03-20 | 2012-07-25 | 王军 | Method for removing nitrogen and phosphorus contained in eutrophic seawater |
| CN101851023A (en) * | 2010-03-26 | 2010-10-06 | 北京神州瑞霖环保科技有限公司 | Underflow type constructed wetland system with coke powder-steel slag compound filler |
| CN103172179B (en) * | 2011-10-31 | 2014-04-16 | 上海交通大学 | Artificial wetland device having water quality purification and shield spoil absorption treatment functions |
| CN102502966B (en) * | 2011-10-31 | 2014-01-01 | 上海交通大学 | Manual hydroponic wetland device with nitrogen-phosphorus nutritive salt enrichment function |
| CN103708671A (en) * | 2012-09-28 | 2014-04-09 | 中国科学院烟台海岸带研究所 | Multi-medium constructed wetland water treatment system and treatment method thereof |
| CN103091462B (en) * | 2013-01-18 | 2015-03-11 | 北京林业大学 | Device and method for determining anti-flooding and anti-scouring performances of aquatic plants |
| CN103214148A (en) * | 2013-04-18 | 2013-07-24 | 山东省分析测试中心 | Multistage-series stepped natural-type artificial wetland and construction method |
| CN104045163B (en) * | 2014-06-26 | 2016-02-24 | 南京师范大学 | A kind of method utilizing titanium-containing blast furnace slag to promote Wastewater Treatment by Constructed Wetlands performance |
| CN110092543B (en) * | 2019-05-14 | 2022-11-18 | 自然资源部海岛研究中心 | Environment-friendly treatment method for tail water of urban sewage treatment plant by using algae pond, artificial wetland and ecological pond |
| CN111937687A (en) * | 2020-07-15 | 2020-11-17 | 莱芜职业技术学院 | Damaged repair system of wetland |
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