CN104817239B - A kind of heavily contaminated water course in situ water purification system and purification method - Google Patents

A kind of heavily contaminated water course in situ water purification system and purification method Download PDF

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CN104817239B
CN104817239B CN201510255601.1A CN201510255601A CN104817239B CN 104817239 B CN104817239 B CN 104817239B CN 201510255601 A CN201510255601 A CN 201510255601A CN 104817239 B CN104817239 B CN 104817239B
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course
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CN104817239A (en
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路逸居
张后虎
赵泽华
赵克强
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China Nuclear Industry Huaxing Construction Co Ltd
Nanjing Institute of Environmental Sciences MEP
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China Nuclear Industry Huaxing Construction Co Ltd
Nanjing Institute of Environmental Sciences MEP
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Abstract

The invention discloses a kind of heavily contaminated water course in situ water purification system and purification method, belong to sewage treatment area.The original position water purification system of the present invention includes poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, poly-phosphorus processing unit is arranged on river shoal waters, aerobic-anaerobic-anaerobism clean unit is arranged on waters, non-shoal, river course, including bamboo silk filler, aerated conduit and cap closure material, the present invention makes full use of the feature in river course self, set up aerated conduit that river course is transformed into the aerobic-anaerobic-Anaerobe reaction zone of several series connection by interval in river course, improve the nitrated of water body, denitrifying capacity, significantly improve the denitrification effect of system, the present invention makes full use of the feature of each processing unit, it is effectively combined, enhance the treatment effect of denitrogenation dephosphorizing, realize in-situ immobilization and the purification of water body, be suitable to promote the use of.

Description

A kind of heavily contaminated water course in situ water purification system and purification method
Technical field
The invention belongs to sewage treatment area, more particularly, it relates to a kind of heavily contaminated water course in situ water purification system and purification method.
Background technology
Along with the continuous growth of socioeconomic development and population, the source water in global range pollutes increasingly severe, and river pollution is also the concentrated expression of water environment pollution, obtains increasingly paying close attention to widely.River course, lake etc. is entered in a large number without the industrial wastewater effectively processed, sanitary sewage, cause water environment pollution, the interference of natural ecosystems has been broken structure and the balance of original ecosystem, and the eco-environmental impact thus brought has caused the great attention of people.
At present, domestic and international research worker conducts extensive research for river pollution recovery technique, and achieves certain achievement in research.River pollution recovery technique refers to by various technology and means, makes the method that the pollutant in sewage are removed or converted.Difference according to cleaning principle, river water body purification techniques is broadly divided into: cuts a dirt and receives pipe process, Sediment Dredging, Ecological Disposal etc..The mechanism of action of bio-ecological restoration technology relies primarily on the biological degraded assimilation to pollutant, low concentration pollutant carries out enrichment convert, recover the disappearance component of water body degraded ecosystem structure, thus realizing rebuilding water ecosystem and improving the purpose of water quality.What bio-ecological restoration technology adopted is in-situ immobilization method, and surrounding environment influence is little, and simple process and instant effect, secondary pollution are few, and can be effectively improved surrounding landscape environment, be following water remediation give priority to trend.nullChinese Patent Application No. is 201210180985.1,The patent application document that the applying date is on 06 04th, 2012 discloses a kind of material repairing polluted water body and bed mud and method,The method adopts nontoxic solid particulate matter,Composite is prepared after certain way loading microorganisms,With described composite original position flocculation or adsorbed water body in pollutant and be transferred in bed mud,To reach pollutant original position in water body is collected、Concentrate and the purpose of fast degradation in bed mud,Pollutant in bed mud also can be degraded after being settled down to bed mud by composite,Improve water quality bottom environment,But this invention has following defects that first,The microbe species of composite load and density are not high,In longtime running,The nitration denitrification process that polluted-water is imperfect,It is difficult to ensure that operational effect;Second, composite is after flocculation rapid subsidence, and only contact bottom of river channel current, have some limitations.Chinese Patent Application No. is 201320443267.9, the patent application document that the applying date is on 07 24th, 2013 discloses a kind of multistage series and parallel artificial wet land system for country sewage denitrogenation dephosphorizing, including 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, and lower disposed hypothallus is connected with vertical subsurface flow wetland unit thereafter;Vertical subsurface flow wetland unit is the intermediate treatment unit of artificial wet land system, there are two vertical subsurface flow wetlands parallel connection, interior plantation emergent aquactic plant, there is the drainage blanket of water distribution pipe network, water distribution layer, hypothallus, drainage pipeline networks from top to bottom successively, connect with horizontal drowned flow artificial wet land unit thereafter;Horizontal drowned flow artificial wet land unit is the end-o f-pipe-control unit of artificial wet land system, interior plantation emergent aquactic plant, has the water distribution layer of water distributor, hypothallus, drainage blanket containing drain pipe and outlet pipe from front to back successively along inflow direction.Chinese Patent Application No. is 201010166392.0, the patent application document that the applying date is on 05 10th, 2010 discloses a kind of constructed wetland coupling SBR denitrification and phosphorus removal integration sewage purification system, including sbr reactor pond and artificial swamp, the bottom in sbr reactor pond is provided with boring aeration pipe, being provided with discharge pipeline, water inlet pipe, muddy water overflow pipe and drain pipe on the pool wall in sbr reactor pond, wherein muddy water overflow pipe and drain pipe communicate with the cloth tank of artificial swamp;The bed body of artificial swamp includes cloth tank, packing layer, soil layer and water leg, and the top of packing layer connects with cloth tank, and the bottom of packing layer connects with water leg, and soil layer is arranged on above packing layer, soil layer is planted and is implanted with emergent aquactic plant.Above-mentioned 2 kinds of inventions all propose a kind of effective pollutant control purification techniques, but it is big all to there is required floor space, energy consumption height, the weak points such as infrastructure investment is high.
Summary of the invention
1. the problem solved
There is the problems such as energy consumption height, infrastructure investment height and denitrogenation dephosphorizing ability for existing sewage disposal technology, the present invention provides a kind of heavily contaminated water course in situ water purification system and purification method.The original position water purification system of the present invention includes poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, poly-phosphorus processing unit is arranged on river shoal waters, aerobic-anaerobic-anaerobism clean unit is arranged on waters, non-shoal, river course, including bamboo silk filler, aerated conduit and cap closure material, the present invention makes full use of the feature in river course self, set up aerated conduit that river course is transformed into the aerobic-anaerobic-Anaerobe reaction zone of several series connection by interval in river course, 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 problems referred to above, the technical solution adopted in the present invention is as follows:
A kind of heavily contaminated water course in situ water purification system, including poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, described poly-phosphorus processing unit is arranged on the bank depth of water waters, shoal less than 0.6m, poly-phosphorus processing unit includes step unit, two grades of ladder unit, three grades of ladder unit and poly-phosphorus filler, described poly-phosphorus filler is laid on river shoal water bottom, and waters, shoal is divided into step unit, two grades of ladder unit and three grades of ladder unit according to depth of water difference;The described step unit depth of water is 0~0.2m, plants emergent aquactic plant in waters;Two grades of described ladder unit depth of waters are 0.2~0.4m, plant fluitante 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, including 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 pretreatment: choose sewage treatment plant's biochemical sludge (moisture content is lower than 70%) after filter pressing and attapulgite (place of production is Xuyi Jiangsu) as raw material, through broken, screening process pretreatment, by the mud after dehydration and attapulgite (1~3.5) in mass ratio: 1 configures;
B () sample preparation: above-mentioned raw materials is made particle diameter and is sized to the filler of 2~5cm, when high temperature 500 DEG C~1200 DEG C, forms poly-phosphorus filler after sintering 1~2h.
Preferably, described emergent aquactic plant is Herba Typhae, phragmites communis, Medulla Junci;Described fluitante is duckweed, Herba Spirodelae, water standing grain;Described submerged plant is black algae, hornwort, watermifoil, Flos nymphaeae (Nymphaea teragona Georgi);The planting density of described emergent aquactic plant, fluitante and submerged plant is: line-spacing 0.4~0.6m, spacing in the rows 0.2~0.4m.
Preferably, described aerated conduit is that batch (-type) is arranged, and arranges 5~8m aerated conduit every 20~30m in river course, and aeration time is 4~10h, and the gas of aeration is air, and aeration flow is 1~3m3/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 0.2~0.5m3/m3
Preferably, described cap closure material is laying depth is the sandstone of 3~5cm, and described sandstone is 2~3 layers, and every layer of sandstone laying depth is 1~2.5cm, and gravel size is sized to 1.5~2.5mm and 5~6mm.
A kind of heavily contaminated water course in situ method for purifying water, uses above-mentioned a kind of heavily contaminated water course in situ water purification system to purify, the steps include:
A () builds water purification system: build a kind of heavily contaminated water course in situ water purification system as above in contaminated river course, 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 that water body in river course is carried out aeration, and aeration time is 4~10h, and aeration flow is 1~3m3/ h, maintaining aerobic zone dissolved oxygen concentration in water is 1.5~2.5mg/L, and anoxic zone dissolved oxygen concentration is 0.2~0.6mg/L, and anaerobic zone dissolved oxygen concentration is 0~0.2mg/L;Microorganism is in the attachment of bamboo silk filling surface and the pollutant in river water body are degraded;The phosphorus in poly-phosphorus filling adsorption water body in poly-phosphorus processing unit, provides nutrient for emergent aquactic plant, fluitante and submerged plant, and emergent aquactic plant, fluitante and submerged plant promote purification of water quality.
The difficult point of the present invention is in that: traditional artificial wet land system all exists the weak points such as required floor space is big, and energy consumption is high, and infrastructure investment is high when processing sewage, it is impossible to realize the in-situ treatment of sewage.The present invention utilizes the feature that river course self is long and narrow cleverly, aerated conduit is set up by interval in river course, every 20~30m, 5~8m aerated conduit is set, polluted water body in river course is carried out aeration by the mode adopting micro-pore aeration, natural aerobic nitrification district can be formed at aerated conduit Its Adjacent Waters after aeration, flowing along with water body, in the region being not provided with aerated conduit, dissolved oxygen is gradually lowered, form anoxia, anaerobic reaction district, river course is transformed into the aerobic-anaerobic-Anaerobe reaction zone of several series connection by the present invention in this way, sewage is made to realize the purified in situ of water quality in river course, in river course, hang bamboo silk filler simultaneously, the advantage that bamboo silk specific surface area is big is utilized to adsorb a large amount of microorganisms, 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 shoal waters, lay poly-phosphorus filler at shoal water bottom and waters, shoal is transformed into three grades of ladder unit, and in three grades of ladder unit, plant emergent aquactic plant, fluitante and submerged plant, gather the P elements in phosphorus filler energy efficient absorption water body and it can be used as the nutrient of plant growing, 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, the detergent power in river course can be substantially improved simultaneously, it it is the process system and method for a kind of low energy consumption, low cost, high benefit, can effectively process heavily contaminated river course, realize in-situ regeneration and the reparation of water body, the environmental carrying capacity making its carrying is bigger, is suitable to promote the use of.The substantial improvements of the present invention is embodied in: 1. adopt interval aeration, ingenious dissolved oxygen in water body flow process is utilized to have the principle to a certain degree declined, river course is transformed into the mini system of natural aerobic, anoxia, anaerobism alternate run, and by multiple mini system series operations, increase water quality purification efficiency, it is achieved that the in-situ regeneration of water body and reparation;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 the poly-phosphorus absorption property of excellence, using the nutrient raw material as plant of the phosphorus in water, recycle;3. adopt bamboo silk filler as the attachment of biomass, there is bigger specific surface area, better purification efficiency, and light weight, easy to be filmed.
3. beneficial effect
Compared to prior art, the invention have the benefit that
(1) present invention arranges poly-phosphorus filler at river shoal water bottom, water body and poly-phosphorus filler are fully contacted, utilize the biomass slag with high poly-phosphorus performance by P elements adsorpting aggregation in water the nutritious fertilizer being used for landscape plant (emergent aquactic plant, fluitante and submerged plant), not only water body is had significant phosphor-removing effect, realize the regeneration of poly-phosphorus filler, and the purification of water quality is also had good facilitation by the landscape plant planted;
(2) present invention arranges 5~8m aerated conduit every 20~30m in river course, polluted water body in river course is carried out aeration by the mode adopting micro-pore aeration, 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, flowing along with water body, in the region being not provided with aerated conduit, dissolved oxygen is gradually lowered, form anoxia (dissolved oxygen concentration is 0.2~0.6mg/L), anaerobic reaction district (dissolved oxygen concentration is 0~0.2mg/L), river course is transformed into the aerobic-anaerobic-Anaerobe reaction zone of several series connection, improve the nitrated of water body, denitrifying capacity, significantly improve the denitrification effect of system, form a set of efficiently quick river water body based technique for in-situ remediation;
(3) setting support in present invention aerobic-anaerobic-Anaerobe reaction zone in river course, 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 bigger specific surface area, and can adhere to a large amount of microorganism can degraded rapidly and efficiently to the pollutant in water body;
(4) present invention arranges bed mud curing area in bottom of river channel, adopt cap closure material to be solidified by bed mud, and completely cut off with water body, it is to avoid the pollutant and the heavy metal that contain in bed mud are again introduced into river course, affect water quality;
(5) in the present invention, each reaction zone has long and narrow feature design, the self-purification capacity of strengthening river water body, it is achieved water course in situ purifies, and the suitability is strong all in accordance with river course.
Accompanying drawing explanation
Fig. 1 is the cross-sectional structure schematic diagram of the present invention;
Fig. 2 is the top view of the present invention.
In figure: 1, step unit;2, two grades of ladder unit;3, three grades of ladder unit;4, poly-phosphorus filler;5, bamboo silk filler;6, aerated conduit;7, cap closure material.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is further described below.
Embodiment 1
nullAs shown in Figure 1,At Taihu Lake basin contaminated fluid stream channel (long 6.45km in river course,Wide 25m) a kind of heavily contaminated water course in situ water purification system of middle structure,Including poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit,Shoal water bottom in tributary lays poly-phosphorus filler 4,Laying depth is 15cm、25cm、35cm is incremented by step by step,Waters, shoal (the bank depth of water waters less than 0.6m) is built successively by bank to direction, river course stepped step unit 1、Two grades of ladder unit 2 and three grades of ladder unit 3,Poly-phosphorus filler 4 is utilize biochemical sludge (sewage treatment plant's moisture content after filter pressing is the biochemical sludge of 50%) and attapulgite (place of production is Xuyi Jiangsu) as raw material,Through broken、1:2.5 mixing in mass ratio after screening process pretreatment,Then make particle diameter and be sized to the filler of 2~5cm,The spherical poly-phosphorus filler formed after sintering 1h under the high temperature of 1000 DEG C,Laying poly-phosphorus filler 4 rear stage ladder unit 1 depth of water is 0~0.2m,In waters, the emergent aquactic plant of plantation is mainly Herba Typhae、Phragmites communis;Two grades of described ladder unit 2 depth of waters are 0.2~0.4m, and in waters, the fluitante of plantation is mainly duckweed, Herba Spirodelae;Three grades of described ladder unit 3 depth of waters are 0.4~0.6m, and in waters, the submerged plant of plantation is mainly watermifoil, Flos nymphaeae (Nymphaea teragona Georgi), 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, including bamboo silk filler 5, aerated conduit 6 and cap closure material 7, at the double-deck sandstone that bottom of river channel laying depth is 3cm as cap closure material 7, the every layer thickness of sandstone is 1.5cm, particle diameter is 5mm, 2mm respectively, the sandstone of the first big particle diameter of place mat, the then little particle diameter sandstone of place mat on big particle diameter sandstone;Aerated conduit 6 is laid on the top of cap closure material 7, aerated conduit 65 meters wide is laid every 20 meters in river course, bank, river course is provided with aerator, aerated conduit 6 is connected with aerator, air is sent in aerated conduit 6 by aerator, then aerated conduit 6 by the way of micro-pore aeration to river course in polluted water body carry out aeration, adopt the mode of intermittent aerating, every day aeration 4h, aeration flow-control is at 1.0~1.5m3Between/h;Forming aerobic nitrification district at aerated conduit 6 Its Adjacent Waters after aeration, maintenance oxygen in water is 1.5~2.5mg/L;Flowing along with water body, in the region being not provided with aerated conduit, dissolved oxygen is gradually lowered, form anoxia (dissolved oxygen concentration is 0.2~0.6mg/L), anaerobism (dissolved oxygen concentration is 0~0.2mg/L) reaction zone, river course is transformed into the aerobic-anaerobic-Anaerobe reaction zone of several series connection, forms knockdown multistage A2/ O cleaning system;Setting support in aerobic-anaerobic-Anaerobe reaction zone, hangs bamboo silk filler 5 and is fixed on support, and the length of bamboo silk filler 5 is 1.2m, and erection density is 0.3m3/m3, 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;Adopting said system to carry out original position purification of water quality after engineered, after processing 5 days, the ammonia nitrogen concentration in water reduces to 1.35mg/L, COD22.7mg/L, total phosphorus 0.19mg/L, suspended material 3.2mg/L.The present embodiment comprehensive utilization river course own characteristic, in river course, natural aerobic, anoxia, anaerobic reaction district is built by the mode of intermittent aerating, and poly-phosphorus Ecological Restoration Area is built on riverbank, enhance water body purification ability greatly, it is achieved the purified in situ in heavily contaminated river course.
Embodiment 2
nullThe 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 heavily contaminated water course in situ water purification system of middle structure,Including poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit,Shoal water bottom in contaminated river course lays poly-phosphorus filler 4,Laying depth is 15cm、35cm、45cm is incremented by step by step,Waters, shoal (the bank depth of water waters less than 0.6m) is built successively by bank to direction, river course stepped step unit 1、Two grades of ladder unit 2 and three grades of ladder unit 3,Poly-phosphorus filler 4 is utilize biochemical sludge (sewage treatment plant's moisture content after filter pressing is the biochemical sludge of 70%) and attapulgite (place of production is Xuyi Jiangsu) as raw material,Through broken、1:3.5 mixing in mass ratio after screening process pretreatment,Then make particle diameter and be sized to the filler of 2~5cm,The spherical poly-phosphorus filler formed after sintering 2h under the high temperature of 1200 DEG C,Laying poly-phosphorus filler 4 rear stage ladder unit 1 depth of water is 0~0.2m,In waters, the emergent aquactic plant of plantation is mainly Herba Typhae、Medulla Junci;Two grades of described ladder unit 2 depth of waters are 0.2~0.4m, and in waters, the fluitante of plantation is mainly duckweed, water standing grain;Three grades of described ladder unit 3 depth of waters are 0.4~0.6m, and in waters, the submerged plant of plantation 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, including bamboo silk filler 5, aerated conduit 6 and cap closure material 7, at the double-deck sandstone that bottom of river channel laying depth is 4cm as cap closure material 7, the every layer thickness of sandstone is 2.0cm, particle diameter is 6mm, 1.5mm respectively, the sandstone of the first big particle diameter of place mat, the then little particle diameter sandstone of place mat on big particle diameter sandstone;Aerated conduit 6 is laid on the top of cap closure material 7, aerated conduit 66 meters wide is laid every 25 meters in river course, bank, river course is provided with aerator, aerated conduit 6 is connected with aerator, air is sent in aerated conduit 6 by aerator, then aerated conduit 6 by the way of micro-pore aeration to river course in polluted water body carry out aeration, adopt the mode of intermittent aerating, every day aeration 8h, aeration flow-control is between 1.5~2.5m3/h;Forming aerobic nitrification district at aerated conduit 6 Its Adjacent Waters after aeration, maintenance oxygen in water is 1.5~2.5mg/L;Flowing along with water body, in the region being not provided with aerated conduit, dissolved oxygen is gradually lowered, form anoxia (dissolved oxygen concentration is 0.2~0.6mg/L), anaerobism (dissolved oxygen concentration is 0~0.2mg/L) reaction zone, river course is transformed into the aerobic-anaerobic-Anaerobe reaction zone of several series connection, forms knockdown multistage A2/O cleaning 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;Adopting said system to carry out original position purification of water quality after engineered, after processing 7 days, the ammonia nitrogen concentration in water reduces to 3.45mg/L, COD28.4mg/L, total phosphorus 0.12mg/L, suspended material 5.23mg/L.The present embodiment comprehensive utilization river course own characteristic, in river course, natural aerobic, anoxia, anaerobic reaction district is built by the mode of intermittent aerating, and poly-phosphorus Ecological Restoration Area is built on riverbank, enhance water body purification ability greatly, it is achieved the purified in situ in heavily contaminated river course.
Embodiment 3
nullThe 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 heavily contaminated water course in situ water purification system of middle structure,Including poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit,Shoal water bottom in contaminated river course lays poly-phosphorus filler 4,Laying depth is 15cm、35cm、55cm is incremented by step by step,Waters, shoal (the bank depth of water waters less than 0.6m) is built successively by bank to direction, river course stepped step unit 1、Two grades of ladder unit 2 and three grades of ladder unit 3,Poly-phosphorus filler 4 is utilize biochemical sludge (sewage treatment plant's moisture content after filter pressing is the biochemical sludge of 40%) and attapulgite (place of production is Xuyi Jiangsu) as raw material,Through broken、1:1.5 mixing in mass ratio after screening process pretreatment,Then make particle diameter and be sized to the filler of 2~5cm,The spherical poly-phosphorus filler formed after sintering 1.5h under the high temperature of 600 DEG C,Laying poly-phosphorus filler 4 rear stage ladder unit 1 depth of water is 0~0.2m,In waters, the emergent aquactic plant of plantation is mainly phragmites communis、Medulla Junci;Two grades of described ladder unit 2 depth of waters are 0.2~0.4m, and in waters, the fluitante of plantation is mainly Herba Spirodelae, water standing grain;Three grades of described ladder unit 3 depth of waters are 0.4~0.6m, and in waters, the submerged plant of plantation 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, including bamboo silk filler 5, aerated conduit 6 and cap closure material 7, at the double-deck sandstone that bottom of river channel laying depth is 5cm as cap closure material 7, the every layer thickness of sandstone is 2.5cm, particle diameter is 5.5mm, 2.5mm respectively, the sandstone of the first big particle diameter of place mat, the then little particle diameter sandstone of place mat on big particle diameter sandstone;Aerated conduit 6 is laid on the top of cap closure material 7, aerated conduit 68 meters wide is laid every 30 meters in river course, bank, river course is provided with aerator, aerated conduit 6 is connected with aerator, air is sent in aerated conduit 6 by aerator, then aerated conduit 6 by the way of micro-pore aeration to river course in polluted water body carry out aeration, adopt the mode of intermittent aerating, every day aeration 10h, aeration flow-control is at 2~3m3Between/h;Forming aerobic nitrification district at aerated conduit 6 Its Adjacent Waters after aeration, maintenance oxygen in water is 1.5~2.5mg/L;Flowing along with water body, in the region being not provided with aerated conduit, dissolved oxygen is gradually lowered, form anoxia (dissolved oxygen concentration is 0.2~0.6mg/L), anaerobism (dissolved oxygen concentration is 0~0.2mg/L) reaction zone, river course is transformed into the aerobic-anaerobic-Anaerobe reaction zone of several series connection, forms knockdown multistage A2/ O cleaning system;Setting support in aerobic-anaerobic-Anaerobe reaction zone, hangs bamboo silk filler 5 and is fixed on support, and the length of bamboo silk filler 5 is 1.5m, and erection density is 0.4m3/m3, 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;Adopting said system to carry out original position purification of water quality after engineered, after processing 7 days, the ammonia nitrogen concentration in water reduces to 2.78mg/L, COD25.6mg/L, total phosphorus 0.23mg/L, suspended material 3.47mg/L.The present embodiment comprehensive utilization river course own characteristic, in river course, natural aerobic, anoxia, anaerobic reaction district is built by the mode of intermittent aerating, and poly-phosphorus Ecological Restoration Area is built on riverbank, enhance water body purification ability greatly, it is achieved the purified in situ in heavily contaminated river course.
Schematically the present invention and embodiment thereof being described above, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if those of ordinary skill in the art is enlightened by it, when without departing from the invention objective, design the frame mode similar to this technical scheme and embodiment without creationary, protection scope of the present invention all should be belonged to.

Claims (6)

1. a heavily contaminated water course in situ water purification system, it is characterized in that: include poly-phosphorus processing unit and aerobic-anaerobic-anaerobism clean unit, described poly-phosphorus processing unit is arranged on the bank depth of water waters, shoal less than 0.6m, poly-phosphorus processing unit includes step unit (1), two grades of ladder unit (2), three grades of ladder unit (3) and poly-phosphorus filler (4), described poly-phosphorus filler (4) is laid on river shoal water bottom, waters, shoal is divided into step unit (1) according to depth of water difference, two grades of ladder unit (2) and three grades of ladder unit (3);Described step unit (1) depth of water is 0~0.2m, plants emergent aquactic plant in waters;Two grades of ladder unit (2) depth of waters are 0.2~0.4m, plant fluitante 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, including 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;The laying depth of described poly-phosphorus filler (4) is 15~55cm, and its preparation process is as follows:
A () material choice and pretreatment: choose biochemical sludge and attapulgite as raw material, through broken, screening process pretreatment, by the mud after dehydration and attapulgite (1~3.5) in mass ratio: 1 configures;
B () sample preparation: above-mentioned raw materials is made particle diameter and is sized to the filler of 2~5cm, when high temperature 500 DEG C~1200 DEG C, forms poly-phosphorus filler (4) after sintering 1~2h.
2. a kind of heavily contaminated water course in situ water purification system according to claim 1, it is characterised in that: described emergent aquactic plant is Herba Typhae, phragmites communis or Medulla Junci;Described fluitante is duckweed, Herba Spirodelae or water standing grain;Described submerged plant is black algae, hornwort, watermifoil or Flos nymphaeae (Nymphaea teragona Georgi);The planting density of described emergent aquactic plant, fluitante and submerged plant is: line-spacing 0.4~0.6m, spacing in the rows 0.2~0.4m.
3. a kind of heavily contaminated water course in situ water purification system according to claim 1, it is characterized in that: described aerated conduit (6) is arranged for batch (-type), 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 aeration flow is 1~3m3/h。
4. a kind of heavily contaminated water course in situ 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 0.2~0.5m3/m3
5. a kind of heavily contaminated water course in situ water purification system according to claim 1, it is characterized in that: described cap closure material (7) is the sandstone of 3~5cm for laying depth, described sandstone is 2~3 layers, every layer of sandstone laying depth is 1~2.5cm, and gravel size is sized to 1.5~2.5mm and 5~6mm.
6. a heavily contaminated water course in situ method for purifying water, it is characterised in that: use a kind of heavily contaminated water course in situ water purification system described in claim 1 to purify, the steps include:
A () builds water purification system: build a kind of heavily contaminated water course in situ water purification system as claimed in claim 1 in contaminated river course, 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: utilizing aerated conduit (6) that water body in river course is carried out aeration, aeration time is 4~10h, and aeration flow is 1~3m3/ h, maintaining aerobic zone dissolved oxygen concentration in water is 1.5~2.5mg/L, and anoxic zone 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 the pollutant in river water body are degraded;The phosphorus in poly-phosphorus filler (4) adsorbed water body in poly-phosphorus processing unit, provides nutrient for emergent aquactic plant, fluitante and submerged plant, and emergent aquactic plant, fluitante 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 purification process.
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