CN104817239A - Novel in-situ water purification system and purification method for heavily polluted river - Google Patents
Novel in-situ water purification system and purification method for heavily polluted river Download PDFInfo
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Abstract
The invention discloses novel in-situ water purification system and a purification method for a heavily polluted river, and belongs to the field of sewage treatment. The in-situ water purification system disclosed by the invention comprises a polyphosphate treatment unit and an aerobiotic-anaerobic-anaerobic purification unit, wherein the polyphosphate treatment unit is arranged in a shallow water area of the river; and the aerobiotic-anaerobic-anaerobic purification unit is arranged in a non-shallow water area of the river, and comprises a bamboo filament packing, aeration pipeline and a cap sealing material. The characteristics of the river are fully utilized; and through the intermittent arrangement of the aeration pipelines in the river, the river is transformed into a plurality of aerobiotic-anaerobic-anaerobic biological reaction zones which are connected with one another in series, so that the nitrification capacity and denitrifying capacity of a water body are improved; and the denitrification effect of the system is greatly improved. The characteristics of various treatment units are fully utilized; various treatment units are effectively combined, so that the denitrification and phosphorous removal treatment effects are strengthened; in-situ repair and purification of the water body are realized; and the novel in-situ water purification system and the purification method are suitable for popularization and application.
Description
Technical field
The invention belongs to sewage treatment area, more particularly, relate to a kind of Novel heavy polluted river channel original position water purification system and purifying method.
Background technology
Along with the continuous growth of socioeconomic development and population, the source water in global range pollutes more and more serious, and stream pollution is also the concentrated expression of water environment pollution, obtains paying close attention to more and more widely.River course, lake etc. is entered in a large number without the trade effluent effectively processed, sanitary sewage, cause water environment pollution, the interference of natural ecosystems has been broken to structure and the balance of the original ecosystem, the eco-environmental impact brought thus has caused the great attention of people.
At present, domestic and international researchist conducts extensive research for stream pollution recovery technique, and achieves certain achievement in research.Stream pollution recovery technique refers to by various technology and means, makes the method that the pollutent in sewage is removed or transformed.According to the difference of cleaning principle, river water body purification techniques is mainly divided into: cut a dirt and receive pipe process, Sediment Dredging, Ecological Disposal etc.The mechanism of action of bio-ecological restoration technology mainly relies on the biological degraded assimilation to pollutent, low concentration pollutant is carried out enrichment conversion, recover the disappearance component of water body degraded ecosystem structure, thus realize rebuilding water ecosystem and the object improving water quality.What bio-ecological restoration technology adopted is in-situ immobilization method, little to surrounding environment influence, and simple process and instant effect, secondary pollution are few, and can effectively improve surrounding landscape environment, be following water remediation give priority to trend.Chinese Patent Application No. is 201210180985.1, the applying date is that the patent application document of on 06 04th, 2012 discloses a kind of materials and methods repairing polluted water body and bed mud, nontoxic solid particulate matter is adopted in the method, obtained matrix material after certain way loading microorganisms, be transferred in bed mud with the pollutent in the flocculation of described matrix material original position or adsorbed water body, to reach, pollutent original position in water body is collected, concentrated and object that is fast degradation in bed mud, matrix material also can be degraded to the pollutent in bed mud after being settled down to bed mud, improve water quality bottom environment, but there is following defect in this invention: first, the microbe species of matrix material load and density are not high, in long-time running, the nitration denitrification process that polluted-water is imperfect, be difficult to ensure operating performance, the second, matrix material, after flocculation rapid subsidence, only contacts bottom of river channel current, has some limitations.Chinese Patent Application No. is 201320443267.9, the applying date is that the patent application document of on 07 24th, 2013 discloses a kind of multistage series and parallel artificial wet land system for country sewage denitrogenation dephosphorizing, comprise surface current artificial wetland's unit, vertical subsurface flow wetland unit, horizontal drowned flow artificial wet land unit, surface current artificial wetland's unit connects vertical subsurface flow wetland unit, and vertical subsurface flow wetland unit connects horizontal drowned flow artificial wet land unit; Surface current artificial wetland's unit is the initial treatment unit of artificial wet land system, interior plantation floating plant, lower disposed hypothallus, with vertical subsurface flow wetland units in series thereafter; Vertical subsurface flow wetland unit is the intermediate treatment unit of artificial wet land system, walk abreast and be connected with two vertical subsurface flow wetlands, interior plantation emergent, there is the layer of displacement of water distribution pipe network, water distribution layer, hypothallus, network of drains from top to bottom successively, with horizontal drowned flow artificial wet land units in series thereafter; Horizontal drowned flow artificial wet land unit is the end-o f-pipe-control unit of artificial wet land system, interior plantation emergent, has the water distribution layer of water distributor, hypothallus, layer of displacement containing water shoot and rising pipe along inflow direction from front to back successively.Chinese Patent Application No. is 201010166392.0, the applying date is that the patent application document of on 05 10th, 2010 discloses a kind of constructed wetland coupling SBR denitrification and phosphorus removal integration sewage purification system, comprise sbr reactor pond and artificial swamp, the bottom in sbr reactor pond is provided with boring aeration pipe, the pool wall in sbr reactor pond is provided with shore pipe, water inlet pipe, muddy water upflow tube and water shoot, and wherein muddy water upflow tube and water shoot communicate with the cloth tank of artificial swamp; The bed body of artificial swamp comprises cloth tank, packing layer, soil layer and water leg, and the top of packing layer is communicated with cloth tank, and the bottom of packing layer is communicated with water leg, and soil layer is arranged on above packing layer, soil layer is planted and is implanted with emergent.Above-mentioned 2 kinds of inventions all propose a kind of effective pollutant control purification techniques, but all there is required floor space greatly, the weak points such as energy consumption is high, and infrastructure investment is high.
Summary of the invention
1. the problem that will solve
Have that energy consumption is high, infrastructure investment is high for existing sewage disposal technology and the problem such as denitrogenation dephosphorizing ability, the invention provides a kind of Novel heavy polluted river channel original position water purification system and purifying method.Original position water purification system of the present invention comprises poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, poly-phosphorus processing unit is arranged on river drift waters, aerobic-anaerobic-anaerobism clean unit is arranged on waters, non-shoal, river course, comprise bamboo silk filler, aerated conduit and cap closure material, the present invention makes full use of the feature in river course self, by aerobic-anaerobic-anaerobe reaction zone that interval in river course sets up aerated conduit to become several to connect river course remold, improve the nitrated of water body, denitrifying capacity, significantly improve the denitrification effect of system, environmental benefit is good, processing cost is low, resource utilization is high, achieve in-situ regeneration and the reparation of water body.
2. technical scheme
In order to solve the problem, the technical solution adopted in the present invention is as follows:
A kind of Novel heavy polluted river channel original position water purification system, comprise poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, described poly-phosphorus processing unit is arranged on the waters, shoal that the bank depth of water is less than 0.6m, poly-phosphorus processing unit comprises step unit, secondary ladder unit, three grades of ladder unit and poly-phosphorus filler, described poly-phosphorus filler is laid on river drift water bottom, and waters, shoal is divided into step unit, secondary ladder unit and three grades of ladder unit successively according to depth of water difference; The described step unit depth of water is 0 ~ 0.2m, plants emergent in waters; The described secondary ladder unit depth of water is 0.2 ~ 0.4m, plants pleuston in waters; Three grades of described ladder unit depth of waters are 0.4 ~ 0.6m, plant planting submerged plant in waters; Described aerobic-anaerobic-anaerobism clean unit is arranged on waters, non-shoal, river course, comprise bamboo silk filler, aerated conduit and cap closure material, described cap closure material is arranged on non-shoal, river course water bottom, described aerated conduit is laid on the top of cap closure material, and described bamboo silk stuffing frame is located at top, waters, non-shoal, river course.
Preferably, the laying depth of described poly-phosphorus filler is 15 ~ 55cm, and its preparation process is;
(a) material choice and pre-treatment: choose the biochemical sludge of sewage work after press filtration (water ratio is lower than 70%) and attapulgite (place of production is Xuyi Jiangsu) as raw material, through broken, screening process pre-treatment, by the mud after dehydration and attapulgite in mass ratio (1 ~ 3.5): 1 is configured;
B () sample preparation: above-mentioned raw materials is made the filler that size is 2 ~ 5cm, under the condition of high temperature 500 DEG C ~ 1200 DEG C, forms poly-phosphorus filler after sintering 1 ~ 2h.
Preferably, described emergent is cattail, reed, Medulla Junci; Described pleuston is duckweed, duckweed, water standing grain; Described submerged plant is black algae, hornwort, watermifoil, water lily; The planting density of described emergent, pleuston and submerged plant is: line-spacing 0.4 ~ 0.6m, spacing in the rows 0.2 ~ 0.4m.
Preferably, described aerated conduit is that intermittent type is arranged, and in river course, arrange 5 ~ 8m aerated conduit every 20 ~ 30m, aeration time is 4 ~ 10h, and the gas of aeration is air, and aerate flux is 1 ~ 3m
3/ h.
Preferably, described bamboo silk filler is that the rolling of bamboo silk forms, and the length of bamboo silk filler is 1.2 ~ 1.5m, and erection density is 0.2 ~ 0.5m
3/ m
3.
Preferably, the sandstone of described cap closure material to be laying depth be 3 ~ 5cm, described sandstone is 2 ~ 3 layers, and every layer of sandstone laying depth is 1 ~ 2.5cm, and gravel size size is 1.5 ~ 2.5mm and 5 ~ 6mm.
A kind of Novel heavy polluted river channel original position method for purifying water, uses above-mentioned a kind of Novel heavy polluted river channel original position water purification system to purify, the steps include:
A () builds water purification system: in contaminated river course, build a kind of Novel heavy polluted river channel original position water purification system as above, in the waters, shoal in contaminated river course, build poly-phosphorus processing unit, in the waters, non-shoal in contaminated river course, build aerobic-anaerobic-anaerobism clean unit;
B () purifies water: utilize aerated conduit to carry out aeration to water body in river course, and aeration time is 4 ~ 10h, and aerate flux is 1 ~ 3m
3/ h, maintaining aerobic zone dissolved oxygen concentration in water is 1.5 ~ 2.5mg/L, and oxygen-starved area dissolved oxygen concentration is 0.2 ~ 0.6mg/L, and anaerobic zone dissolved oxygen concentration is 0 ~ 0.2mg/L; Microorganism adheres at bamboo silk filling surface and degrades to the pollutent in river water body; Phosphorus in poly-phosphorus filling adsorption water body in poly-phosphorus processing unit, for emergent, pleuston and submerged plant provide nutritive element, emergent, pleuston and submerged plant promote purification of water quality.
The weak points such as difficult point of the present invention is: all there is required floor space when traditional artificial wet land system is disposed of sewage large, energy consumption is high, and infrastructure investment is high, can not realize the in-situ treatment of sewage.The feature that the present invention utilizes river course self long and narrow cleverly, aerated conduit is set up by interval in river course, every 20 ~ 30m, 5 ~ 8m aerated conduit is set, the mode of micro-pore aeration is adopted to carry out aeration to polluted water body in river course, natural aerobic nitrification district can be formed at aerated conduit Its Adjacent Waters after aeration, along with the flowing of water body, in the region not arranging aerated conduit, dissolved oxygen reduces gradually, form anoxic, anaerobic reaction district, the aerobic-anaerobic that river course remold becomes several to connect by the present invention in this way-anaerobe reaction zone, make sewage in river course, realize the purified in situ of water quality, in river course, hang bamboo silk filler simultaneously, the large advantage of bamboo silk specific surface area is utilized to adsorb a large amount of microorganism, improve the nitrated of water body, denitrifying capacity, significantly improve the wastewater treatment efficiency of system.The present invention also arranges poly-phosphorus processing unit in river drift waters, lay poly-phosphorus filler at shoal water bottom and waters, shoal is transformed into three grades of ladder unit, and emergent, pleuston and submerged plant is planted in three grades of ladder unit, phosphoric in poly-phosphorus filler energy efficient adsorption water body also it can be used as the nutritive element of plant-growth, the detergent power of strengthening water body, is transformed into the system of high-efficient denitrification and dephosphorization.The present invention has not only saved the required occupation of land of technique, significantly can promote the detergent power in river course simultaneously, a kind of less energy-consumption, low cost, the treatment system of high benefit and method, can effectively process heavily contaminated river course, realize in-situ regeneration and the reparation of water body, the environmental capacity that it is carried is larger, is suitable for promoting the use of.Substantial improvements of the present invention is embodied in: 1. adopt interval aeration, ingeniously dissolved oxygen in water body flow process is utilized to have the principle to a certain degree declined, river course remold is become the mini system of natural aerobic, anoxic, anaerobism alternate run, and by multiple mini system series operation, to increase water quality purification efficiency, achieve in-situ regeneration and the reparation of water body; 2. adopt homemade poly-phosphorus filler, with biochemical sludge and attapulgite as raw material, in mass ratio (1 ~ 3.5): 1 high temperature sintering forms Ball-type packing, there is excellent poly-phosphorus absorption property, using the nutrient raw material of the phosphorus in water as plant, recycle; 3. adopt bamboo silk filler as the attachment of biomass, there is larger specific surface area, better purification efficiency, and light weight, easy to be filmed.
3. beneficial effect
Compared to prior art, beneficial effect of the present invention is:
(1) the present invention arranges poly-phosphorus filler at river drift water bottom, water body fully contacts with poly-phosphorus filler, utilize the biomass slag with high poly-phosphorus performance that phosphoric adsorpting aggregation in water is used for the nutritious fertilizer of landscape plant (emergent, pleuston and submerged plant), not only there is significant phosphor-removing effect to water body, realize the regeneration of poly-phosphorus filler, and the landscape plant of plantation also there is good promoter action to the purification of water quality;
(2) the present invention arranges 5 ~ 8m aerated conduit every 20 ~ 30m in river course, the mode of micro-pore aeration is adopted to carry out aeration to polluted water body in river course, the gas of aeration is air, aerobic nitrification district (dissolved oxygen is 1.5 ~ 2.5mg/L) can be formed at aerated conduit Its Adjacent Waters after aeration, along with the flowing of water body, in the region not arranging aerated conduit, dissolved oxygen reduces gradually, form anoxic (dissolved oxygen concentration is 0.2 ~ 0.6mg/L), anaerobic reaction district (dissolved oxygen concentration is 0 ~ 0.2mg/L), the aerobic-anaerobic becoming several to connect river course remold-anaerobe reaction zone, improve the nitrated of water body, denitrifying capacity, significantly improve the denitrification effect of system, form a set of efficient river water body based technique for in-situ remediation fast,
(3) setting support in the present invention aerobic-anaerobic in river course-anaerobe reaction zone, with rope, bamboo silk filler is fixed on support, bamboo silk filler adopts bamboo silk embroider to make filler unit, then bamboo silk filler is formed with rope by fixing for filler unit series connection, the length of bamboo silk filler is 1.2 ~ 1.5m, suspension is spaced apart 30 ~ 50cm, and bamboo silk filler has larger specific surface area, and can adhere to a large amount of microorganism can degraded rapidly and efficiently to the pollutent in water body;
(4) the present invention arranges bed mud curing area in bottom of river channel, adopts cap closure material to be solidified by bed mud, and completely cuts off with water body, avoids the pollutent that contains in bed mud and heavy metal enters river course again, affects water quality;
(5) in the present invention, each reaction zone all has long and narrow feature design according to river course, the self-purification capacity of strengthening river water body, and realize water course in situ purification, suitability is strong.
Accompanying drawing explanation
Fig. 1 is cross-sectional structure schematic diagram of the present invention;
Fig. 2 is vertical view of the present invention.
In figure: 1, step unit; 2, secondary ladder unit; 3, three grades of ladder unit; 4, poly-phosphorus filler; 5, bamboo silk filler; 6, aerated conduit; 7, cap closure material.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further.
Embodiment 1
As shown in Figure 1, at Taihu Lake basin contaminated fluid stream channel (long 6.45km in river course, wide 25m) a kind of Novel heavy polluted river channel original position water purification system of middle structure, comprise poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, poly-phosphorus filler 4 is laid at the shoal water bottom in tributary, laying depth is 15cm, 25cm, 35cm increases progressively step by step, waters, shoal (the bank depth of water is less than the waters of 0.6m) is built stepped step unit 1 successively by bank to direction, river course, secondary ladder unit 2 and three grades of ladder unit 3, poly-phosphorus filler 4 is for utilizing biochemical sludge (water ratio of sewage work after press filtration is the biochemical sludge of 50%) and attapulgite (place of production is Xuyi Jiangsu) as raw material, through fragmentation, 1:2.5 mixing in mass ratio after screening process pre-treatment, then the filler that size is 2 ~ 5cm is made, the spherical poly-phosphorus filler formed sinter 1h under the high temperature of 1000 DEG C after, laying poly-phosphorus filler 4 rear stage ladder unit 1 depth of water is 0 ~ 0.2m, the emergent planted in waters is mainly cattail, reed, described secondary ladder unit 2 depth of water is 0.2 ~ 0.4m, and the pleuston planted in waters is mainly duckweed, duckweed, three grades of described ladder unit 3 depth of waters are 0.4 ~ 0.6m, and the submerged plant planted in waters is mainly watermifoil, water lily, and planting density is line-spacing 0.5m, spacing in the rows 0.3m, aerobic-anaerobic-anaerobism clean unit is arranged on waters, non-shoal, river course, comprise bamboo silk filler 5, aerated conduit 6 and cap closure material 7, be that the double-deck sandstone of 3cm is as cap closure material 7 at bottom of river channel laying depth, the every layer thickness of sandstone is 1.5cm, particle diameter is respectively 5mm, 2mm, the sandstone of first place mat Large stone, then place mat small particle size sandstone on Large stone sandstone, aerated conduit 6 is laid on the top of cap closure material 7, lay the aerated conduit 6 of 5 meters wide every 20 meters in river course, bank, river course is provided with gas blower, aerated conduit 6 is connected with gas blower, air is sent in aerated conduit 6 by gas blower, and then aerated conduit 6 carries out aeration in the mode of micro-pore aeration to polluted water body in river course, adopts the mode of intermittent aeration, every day aeration 4h, aerate flux controls at 1.0 ~ 1.5m
3between/h, can form aerobic nitrification district at aerated conduit 6 Its Adjacent Waters after aeration, maintenance oxygen in water is 1.5 ~ 2.5mg/L, along with the flowing of water body, in the region not arranging aerated conduit, dissolved oxygen reduces gradually, form anoxic (dissolved oxygen concentration is 0.2 ~ 0.6mg/L), anaerobism (dissolved oxygen concentration is 0 ~ 0.2mg/L) reaction zone, the aerobic-anaerobic becoming several to connect river course remold-anaerobe reaction zone, forms knockdown multistage A
2/ O purification system, setting support in aerobic-anaerobic-anaerobe reaction zone, hung by bamboo silk filler 5 and be fixed on support, the length of bamboo silk filler 5 is 1.2m, and erection density is 0.3m
3/ m
3, the making material of bamboo silk filler 5 is bamboo silk, first bamboo silk embroider is made filler unit, then forms bamboo silk filler with rope by fixing for filler unit series connection.
The water quality in the contaminated tributary of Taihu Lake basin of the present embodiment is before treatment: in water, ammonia nitrogen concentration is 20.5mg/L, COD87mg/L, and total phosphorus concentration is 4.18mg/L, and suspended sediment concentration is 22mg/L, and eutrophication is comparatively serious; After transformation, adopt said system to carry out original position purification of water quality, the ammonia nitrogen concentration processed after 5 days in water reduces to 1.35mg/L, COD 22.7mg/L, total phosphorus 0.19mg/L, suspended matter 3.2mg/L.The present embodiment comprehensive utilization river course own characteristic, in river course, natural aerobic, anoxic, anaerobic reaction district is built by the mode of intermittent aeration, and build poly-phosphorus Ecological Restoration Area on riverbank, enhance water body purification ability greatly, realize the purified in situ in heavily contaminated river course.
Embodiment 2
The present embodiment is contaminated river course (the long 8.91km in river course in water system one tributary of Chaohu, Anhui Province, wide 30m, ) a kind of Novel heavy polluted river channel original position water purification system of middle structure, comprise poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, poly-phosphorus filler 4 is laid at the shoal water bottom in contaminated river course, laying depth is 15cm, 35cm, 45cm increases progressively step by step, waters, shoal (the bank depth of water is less than the waters of 0.6m) is built stepped step unit 1 successively by bank to direction, river course, secondary ladder unit 2 and three grades of ladder unit 3, poly-phosphorus filler 4 is for utilizing biochemical sludge (water ratio of sewage work after press filtration is the biochemical sludge of 70%) and attapulgite (place of production is Xuyi Jiangsu) as raw material, through fragmentation, 1:3.5 mixing in mass ratio after screening process pre-treatment, then the filler that size is 2 ~ 5cm is made, the spherical poly-phosphorus filler formed sinter 2h under the high temperature of 1200 DEG C after, laying poly-phosphorus filler 4 rear stage ladder unit 1 depth of water is 0 ~ 0.2m, the emergent planted in waters is mainly cattail, Medulla Junci, described secondary ladder unit 2 depth of water is 0.2 ~ 0.4m, and the pleuston planted in waters is mainly duckweed, water standing grain, three grades of described ladder unit 3 depth of waters are 0.4 ~ 0.6m, and the submerged plant planted in waters is mainly watermifoil, black algae, and planting density is line-spacing 0.4m, spacing in the rows 0.2m, aerobic-anaerobic-anaerobism clean unit is arranged on waters, non-shoal, river course, comprise bamboo silk filler 5, aerated conduit 6 and cap closure material 7, be that the double-deck sandstone of 4cm is as cap closure material 7 at bottom of river channel laying depth, the every layer thickness of sandstone is 2.0cm, particle diameter is respectively 6mm, 1.5mm, the sandstone of first place mat Large stone, then place mat small particle size sandstone on Large stone sandstone, aerated conduit 6 is laid on the top of cap closure material 7, lay the aerated conduit 6 of 6 meters wide every 25 meters in river course, bank, river course is provided with gas blower, aerated conduit 6 is connected with gas blower, air is sent in aerated conduit 6 by gas blower, and then aerated conduit 6 carries out aeration in the mode of micro-pore aeration to polluted water body in river course, adopts the mode of intermittent aeration, every day aeration 8h, aerate flux controls between 1.5 ~ 2.5m3/h, can form aerobic nitrification district at aerated conduit 6 Its Adjacent Waters after aeration, maintenance oxygen in water is 1.5 ~ 2.5mg/L, along with the flowing of water body, in the region not arranging aerated conduit, dissolved oxygen reduces gradually, form anoxic (dissolved oxygen concentration is 0.2 ~ 0.6mg/L), anaerobism (dissolved oxygen concentration is 0 ~ 0.2mg/L) reaction zone, the aerobic-anaerobic becoming several to connect river course remold-anaerobe reaction zone, forms knockdown multistage A2/O purification system, setting support in aerobic-anaerobic-anaerobe reaction zone, being hung by bamboo silk filler 5 is fixed on support, the length of bamboo silk filler 5 is 1.3m, erection density is 0.5m3/m3, the making material of bamboo silk filler 5 is bamboo silk, first bamboo silk embroider is made filler unit, then form bamboo silk filler with rope by fixing for filler unit series connection.
Contaminated river course in Chaohu, Anhui Province water system one tributary of the present embodiment, its water quality is before treatment: in water, ammonia nitrogen concentration is 34.7mg/L, COD concentration is 98.3mg/L, and total phosphorus concentration is 2.73mg/L, suspended sediment concentration is 45mg/L, and eutrophication is comparatively serious; After transformation, adopt said system to carry out original position purification of water quality, the ammonia nitrogen concentration processed after 7 days in water reduces to 3.45mg/L, COD 28.4mg/L, total phosphorus 0.12mg/L, suspended matter 5.23mg/L.The present embodiment comprehensive utilization river course own characteristic, in river course, natural aerobic, anoxic, anaerobic reaction district is built by the mode of intermittent aeration, and build poly-phosphorus Ecological Restoration Area on riverbank, enhance water body purification ability greatly, realize the purified in situ in heavily contaminated river course.
Embodiment 3
The present embodiment is contaminated river course (the long 4.76km in river course in Huaihe river in Anhui one tributary, wide 23m, ) a kind of Novel heavy polluted river channel original position water purification system of middle structure, comprise poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, poly-phosphorus filler 4 is laid at the shoal water bottom in contaminated river course, laying depth is 15cm, 35cm, 55cm increases progressively step by step, waters, shoal (the bank depth of water is less than the waters of 0.6m) is built stepped step unit 1 successively by bank to direction, river course, secondary ladder unit 2 and three grades of ladder unit 3, poly-phosphorus filler 4 is for utilizing biochemical sludge (water ratio of sewage work after press filtration is the biochemical sludge of 40%) and attapulgite (place of production is Xuyi Jiangsu) as raw material, through fragmentation, 1:1.5 mixing in mass ratio after screening process pre-treatment, then the filler that size is 2 ~ 5cm is made, the spherical poly-phosphorus filler formed sinter 1.5h under the high temperature of 600 DEG C after, laying poly-phosphorus filler 4 rear stage ladder unit 1 depth of water is 0 ~ 0.2m, the emergent planted in waters is mainly reed, Medulla Junci, described secondary ladder unit 2 depth of water is 0.2 ~ 0.4m, and the pleuston planted in waters is mainly duckweed, water standing grain, three grades of described ladder unit 3 depth of waters are 0.4 ~ 0.6m, and the submerged plant planted in waters is mainly hornwort, black algae, and planting density is line-spacing 0.6m, spacing in the rows 0.4m, aerobic-anaerobic-anaerobism clean unit is arranged on waters, non-shoal, river course, comprise bamboo silk filler 5, aerated conduit 6 and cap closure material 7, be that the double-deck sandstone of 5cm is as cap closure material 7 at bottom of river channel laying depth, the every layer thickness of sandstone is 2.5cm, particle diameter is respectively 5.5mm, 2.5mm, the sandstone of first place mat Large stone, then place mat small particle size sandstone on Large stone sandstone, aerated conduit 6 is laid on the top of cap closure material 7, lay the aerated conduit 6 of 8 meters wide every 30 meters in river course, bank, river course is provided with gas blower, aerated conduit 6 is connected with gas blower, air is sent in aerated conduit 6 by gas blower, and then aerated conduit 6 carries out aeration in the mode of micro-pore aeration to polluted water body in river course, adopts the mode of intermittent aeration, every day aeration 10h, aerate flux controls at 2 ~ 3m
3between/h, can form aerobic nitrification district at aerated conduit 6 Its Adjacent Waters after aeration, maintenance oxygen in water is 1.5 ~ 2.5mg/L, along with the flowing of water body, in the region not arranging aerated conduit, dissolved oxygen reduces gradually, form anoxic (dissolved oxygen concentration is 0.2 ~ 0.6mg/L), anaerobism (dissolved oxygen concentration is 0 ~ 0.2mg/L) reaction zone, the aerobic-anaerobic becoming several to connect river course remold-anaerobe reaction zone, forms knockdown multistage A
2/ O purification system, setting support in aerobic-anaerobic-anaerobe reaction zone, hung by bamboo silk filler 5 and be fixed on support, the length of bamboo silk filler 5 is 1.5m, and erection density is 0.4m
3/ m
3, the making material of bamboo silk filler 5 is bamboo silk, first bamboo silk embroider is made filler unit, then forms bamboo silk filler with rope by fixing for filler unit series connection.
Contaminated river course in Huaihe river in Anhui one tributary of the present embodiment, its water quality is before treatment: in water, ammonia nitrogen concentration is 25.9mg/L, COD concentration is 128.3mg/L, and total phosphorus concentration is 6.58mg/L, suspended sediment concentration is 35mg/L, and eutrophication is comparatively serious; After transformation, adopt said system to carry out original position purification of water quality, the ammonia nitrogen concentration processed after 7 days in water reduces to 2.78mg/L, COD 25.6mg/L, total phosphorus 0.23mg/L, suspended matter 3.47mg/L.The present embodiment comprehensive utilization river course own characteristic, in river course, natural aerobic, anoxic, anaerobic reaction district is built by the mode of intermittent aeration, and build poly-phosphorus Ecological Restoration Area on riverbank, enhance water body purification ability greatly, realize the purified in situ in heavily contaminated river course.
Schematically above be described the present invention and embodiment thereof, this description does not have restricted, and also just one of the embodiments of the present invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.
Claims (7)
1. a Novel heavy polluted river channel original position water purification system, it is characterized in that: comprise poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, described poly-phosphorus processing unit is arranged on the waters, shoal that the bank depth of water is less than 0.6m, poly-phosphorus processing unit comprises step unit (1), secondary ladder unit (2), three grades of ladder unit (3) and poly-phosphorus filler (4), described poly-phosphorus filler (4) is laid on river drift water bottom, waters, shoal is divided into step unit (1) successively according to depth of water difference, secondary ladder unit (2) and three grades of ladder unit (3), described step unit (1) depth of water is 0 ~ 0.2m, plants emergent in waters, secondary ladder unit (2) depth of water is 0.2 ~ 0.4m, plants pleuston in waters, three grades of ladder unit (3) depth of waters are 0.4 ~ 0.6m, plant planting submerged plant in waters, described aerobic-anaerobic-anaerobism clean unit is arranged on waters, non-shoal, river course, comprise bamboo silk filler (5), aerated conduit (6) and cap closure material (7), described cap closure material (7) is arranged on non-shoal, river course water bottom, described aerated conduit (6) is laid on the top of cap closure material (7), and described bamboo silk filler (5) is erected at top, waters, non-shoal, river course.
2. a kind of Novel heavy polluted river channel original position water purification system according to claim 1, is characterized in that: the laying depth of described poly-phosphorus filler (4) is 15 ~ 55cm, and its preparation process is as follows:
(a) material choice and pre-treatment: choose biochemical sludge and attapulgite as raw material, through broken, screening process pre-treatment, by the mud after dehydration and attapulgite in mass ratio (1 ~ 3.5): 1 is configured;
B () sample preparation: above-mentioned raw materials is made the filler that size is 2 ~ 5cm, under the condition of high temperature 500 DEG C ~ 1200 DEG C, forms poly-phosphorus filler (4) after sintering 1 ~ 2h.
3. a kind of Novel heavy polluted river channel original position water purification system according to claim 1, is characterized in that: described emergent is cattail, reed, Medulla Junci; Described pleuston is duckweed, duckweed, water standing grain; Described submerged plant is black algae, hornwort, watermifoil, water lily; The planting density of described emergent, pleuston and submerged plant is: line-spacing 0.4 ~ 0.6m, spacing in the rows 0.2 ~ 0.4m.
4. a kind of Novel heavy polluted river channel original position water purification system according to claim 1, it is characterized in that: described aerated conduit (6) is intermittent type setting, in river course, 5 ~ 8m aerated conduit (6) is set every 20 ~ 30m, aeration time is 4 ~ 10h, the gas of aeration is air, and aerate flux is 1 ~ 3m
3/ h.
5. a kind of Novel heavy polluted river channel original position water purification system according to claim 1, it is characterized in that: described bamboo silk filler (5) forms for the rolling of bamboo silk, the length of bamboo silk filler (5) is 1.2 ~ 1.5m, and erection density is 0.2 ~ 0.5m
3/ m
3.
6. a kind of Novel heavy polluted river channel original position water purification system according to claim 1, it is characterized in that: described cap closure material (7) for laying depth be the sandstone of 3 ~ 5cm, described sandstone is 2 ~ 3 layers, every layer of sandstone laying depth is 1 ~ 2.5cm, and gravel size size is 1.5 ~ 2.5mm and 5 ~ 6mm.
7. a Novel heavy polluted river channel original position method for purifying water, is characterized in that: use a kind of Novel heavy polluted river channel original position water purification system described in claim 1 to purify, the steps include:
A () builds water purification system: in contaminated river course, build a kind of Novel heavy polluted river channel original position water purification system as claimed in claim 1, in the waters, shoal in contaminated river course, build poly-phosphorus processing unit, in the waters, non-shoal in contaminated river course, build aerobic-anaerobic-anaerobism clean unit;
B () purifies water: utilize aerated conduit (6) to carry out aeration to water body in river course, aeration time is 4 ~ 10h, and aerate flux is 1 ~ 3m
3/ h, maintaining aerobic zone dissolved oxygen concentration in water is 1.5 ~ 2.5mg/L, and oxygen-starved area dissolved oxygen concentration is 0.2 ~ 0.6mg/L, and anaerobic zone dissolved oxygen concentration is 0 ~ 0.2mg/L; Microorganism is in bamboo silk filler (5) surface attachment and degrade to the pollutent in river water body; Phosphorus in poly-phosphorus filler (4) adsorbed water body in poly-phosphorus processing unit, for emergent, pleuston and submerged plant provide nutritive element, emergent, pleuston and submerged plant promote purification of water quality;
C () water purification system runs 5 ~ 7 days after, the water quality in contaminated river course completes scavenging process.
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| CN106186290A (en) * | 2016-08-31 | 2016-12-07 | 浙江天韵生态环境工程有限公司 | A kind of river water quality in-situ biological purification equipment |
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