CN104591509A - Effective denitrification device of industrial aquaculture tail water - Google Patents

Effective denitrification device of industrial aquaculture tail water Download PDF

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Publication number
CN104591509A
CN104591509A CN201510066695.8A CN201510066695A CN104591509A CN 104591509 A CN104591509 A CN 104591509A CN 201510066695 A CN201510066695 A CN 201510066695A CN 104591509 A CN104591509 A CN 104591509A
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water
flow wetland
subsurface flow
aeration
communicated
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CN104591509B (en
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张世羊
李谷
李晓莉
陶玲
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Yangtze River Fisheries Research Institute CAFS
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Yangtze River Fisheries Research Institute CAFS
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Abstract

The invention discloses an effective denitrification device of industrial aquaculture tail water. A microstrainer of the device is installed in the water outlet of the cultivation fishpond, the water inlet of the microstrainer is connected with the water outlet of the cultivation fishpond, and the water outlet of the microstrainer is connected with the water inlet of an anaerobic fixed-film reactor, the water outlet at top part of the anaerobic fixed-film reactor is connected with the water inlet of a settling pond, the water outlet at top part of the settling pond is provided with a diverter valve, and the water outlet of the settling pond is respectively connected with the water inlet of an aeration vertical-flow wetland and the water inlet of a bending-flow type horizontal subsurface-flow wetland through the diverter valve; the water outlet of the aeration vertical-flow wetland is connected with the water inlet of the bending-flow type horizontal subsurface-flow wetland; the water outlet of the bending-flow type horizontal subsurface-flow wetland is connected with the water inlet of an ultraviolet sterilizer; the water outlet of the ultraviolet sterilizer is connected with the water inlet of a water storage oxygen increasing pond. The device is simple in structure, low in energy consumption and is capable of effectively removing the organic matters, the ammonia nitrogen, the nitrate nitrogen and the nitrite nitrogen and the like in the aquaculture tail water.

Description

A kind of industrialized aquiculture tail water efficient denitrification device
Technical field
The present invention relates to aquaculture tail water processing technology field, be specifically related to a kind of industrialized aquiculture tail water efficient denitrification device, be applicable to batch production and process on a large scale and reclaim aquaculture tail water.
Background technology
China is an aquaculture big country, is the important supply place of World Water product, but traditional extensive fish production mode has been faced with the restriction of the many factors such as resource, environment.Meanwhile, along with the raising of people's quality of the life, famous-particular-excellent fish (as sturgeon, salmon, trout, Puffer, cabrilla etc.) progress into consumption market, and traditional extensive production mode can not meet the cultivation demand of these fish.The industrial circulating water cultivating that exploitation has water saving, province ground, environmental friendliness, condition controlled is an important outlet.
Industrial circulating water cultivating grows up along with improving of science and technology, it is on the basis of high-density breeding, carry out manually or automatically controlling to each factors such as the water quality in production process, water temperature, bait, epidemic prevention, filth disposal or link, make breed variety reach a kind of mode of production of the fastest production rate as far as possible.This cyclic culture mode has and does not limit by region, weather condition, has water saving, saves land, the plurality of advantages such as per unit area yield is high, environmental protection, is the new way realizing fish quality, has now become the important development direction of aquatic product fishery.
Industrial circulating water cultivating system generally includes culturing area and water treatment region two portions.In culturing area, lower floor's aquaculture water dissolved oxygen content is low, and often deposit the solid particulate matters such as the residual bait of fish excrement, therefore need extracting to carry out purification of water quality process to water treatment region, then through sterilization oxygenation, finally be back to culturing area, reach the object that water circulation utilizes.Present stage, industrial circulating water cultivating system common configuration is being built in the good large car of specification, opacifying property, can reach the object of water circulation, but this industrial circulating water cultivating system has following obvious weak point:
One, low to the utilization ratio of the natural energy source such as light, wind.
Two, the equipment of water treatment portion is huge, energy consumption is high, complicated operation, investment and working cost is large, water quality stability is weak.
Three, in water body purification process, lack the effective interception to solid particulate matter, and protein, amino acid, polysaccharide effective decomposition, cause solid particulate matter in aquaculture water, solubilised state larger molecular organics content can be in any more, oxygen consumption is serious.Meanwhile, not high to all kinds of carbon source overall availabilities of enrichment in the solid particulate matter be separated and water body.In breeding process the routine cleaning of water purification facilities and the direct discharge of high density bottom sewage all exacerbate arround carrying capacity of environment, the overall cyclic utilization rate of aquaculture water is not high, and water-saving and emission-reducing effect is undesirable.
Four, existing water treating equipment are in regulating and controlling water quality, are difficult to take into account efficiently remove while ammonia nitrogen, nitre nitrogen or nitrite nitrogen, and the removal efficiency of total nitrogen therefore also can be caused not high.And the accumulation of ammonia nitrogen, nitre nitrogen or nitrite nitrogen is the difficult problem the most easily occurred in present stage industrial circulating water cultivating system.How reducing or controlling the content of the objectionable impurities such as oxygen consumption organic, ammonia nitrogen, nitrite nitrogen in industrial circulating water cultivating system well is the key successfully regulating and controlling water quality.
Artificial swamp is the effective sewage disposal technology of one that development in recent years is got up, less investment, easy care, good purification, applied widely, existing certain application in culture fishery at present.Domestic and international research shows, no matter is single or composite type, and the removal effect of artificial swamp to low stain aquaculture tail water nitrogen pollutant is unsatisfactory, key factor of tracing it to its cause be following some:
One be microorganism nitrated/denitrification is still the main path of artificial swamp denitrogenation.General aquaculture tail water dissolved oxygen content is not high, adds the low dissolved oxygen environments of current wetland inside, and the nitrification of ammonia nitrogen is greatly limited, causes water outlet ammonia nitrogen on the contrary higher than water inlet.
Two is that aquaculture tail water all passed through certain precipitation process before entering artificial swamp, carbon source in water body is deposited on bottom settling tank with particulate form and (or) artificial swamp surface mostly, and solubilised state can utilize carbon source major part to be degraded when nitration reaction.For want of dissolved oxygen, the mineralization of organic material effect being deposited on artificial swamp surface is faint, and the carbon source of the growth of constructed wetland plant and decay process release is little again, causes denitrification carbon source not enough.
Three is compared with trade effluent, and aquaculture tail water has the features such as Pollutant levels are low, quantity discharged is large.Carry out processing with artificial swamp and often present high water-base fluid, short residence time(SRT) phenomenon.And microorganism nitrated/denitrification is not only controlled by Redox Condition, also closely related with hydraulic detention time, extending the residence time can increase nitrated/denitrifying effect probability.
Summary of the invention
In order to solve above-mentioned prior art Problems existing, the invention provides a kind of industrialized aquiculture tail water efficient denitrification device, this apparatus structure is simple, energy consumption is low, simple to operate, investment and working cost few, and organism, ammonia nitrogen, nitre nitrogen and the nitrite nitrogen etc. the while of energy in efficient removal aquaculture tail water, realize the recycle of aquaculture tail water.
Realizing the technical scheme that above-mentioned purpose of the present invention adopts is:
A kind of industrialized aquiculture tail water efficient denitrification device, at least comprise anaerobic fixed film reactor, settling tank, Microfilter, aeration vertical subsurface flow wetland, deflector type horizontal subsurface flow wetland, ultraviolet sterilizer and water storage oxygenation pond, Microfilter is installed on the water port place of cultivation fish pond, the position of Microfilter water-in is lower than the position of the water port of cultivation fish pond, the water-in of Microfilter is communicated with the water port of cultivation fish pond, the water port of Microfilter is communicated with the water-in of anaerobic fixed film reactor, and the water port at anaerobic fixed film reactor top is communicated with the water-in of settling tank;
Described aeration vertical subsurface flow wetland is the pond of brick mix structure, aeration vertical subsurface flow wetland sidewall relative position is provided with water-in and water port, the water-in of aeration vertical subsurface flow wetland is positioned at the top of aeration vertical subsurface flow wetland sidewall, the water port of aeration vertical subsurface flow wetland is positioned at the bottom of aeration vertical subsurface flow wetland sidewall, the inside of aeration vertical subsurface flow wetland is filled with the stronger matrix of adsorptive power, aeration vertical subsurface flow wetland top is provided with the T-shaped water inlet supervisor of horizontal positioned, water inlet supervisor comprises water inlet pipe A and water inlet pipe B, water inlet pipe A is communicated with the middle part of water inlet pipe B, water inlet pipe A is through the water-in of aeration vertical subsurface flow wetland, the top of aeration vertical subsurface flow wetland is provided with the water distributor that a row equidistantly arranges, one end of each water distributor is communicated with water inlet pipe B and perpendicular to water inlet pipe B, the other end is closed, the bottom of water distributor and the top contact of matrix, the bottom of water distributor is provided with the above water vent of two rows, the bottom of aeration vertical subsurface flow wetland is provided with the header that a row equidistantly arranges, header is provided with the above prosopyle of three rows with the part of base contact, bottom aeration vertical subsurface flow wetland, side is provided with the drain header of horizontal positioned, water inlet supervisor comprises branch drain A and branch drain B, branch drain A is communicated with the middle part of branch drain B, branch drain B is parallel to water inlet pipe B, branch drain A is through the water port of aeration vertical subsurface flow wetland, be provided with a row near aeration vertical subsurface flow wetland side-walls in aeration vertical subsurface flow wetland equidistantly to arrange, the vertical tube of vertical placement, vertical tube is higher than stromal surface and end sealing, one end of each header is communicated with branch drain B and perpendicular to branch drain B, the vertical tube that the other end is corresponding with this water shoot is communicated with, plastic hose is interspersed with in each vertical tube, nanometer micropore aeration tube is provided with in each header, the outer of aeration vertical subsurface flow wetland is arranged with dissolved oxygen measurement and control host computer and gas blower, the air outlet place of gas blower is provided with and is connected with total air-supply duct, one end of each plastic hose is communicated with total air-supply duct, the nanometer micropore aeration tube that the other end is corresponding with this plastic hose is communicated with, the junction of drain header and aeration vertical subsurface flow wetland water port is provided with dissolved oxygen observing and controlling sensor, dissolved oxygen observing and controlling sensor is connected with dissolved oxygen measurement and control host computer, dissolved oxygen measurement and control host computer is connected with gas blower,
Described deflector type horizontal subsurface flow wetland is the pond of brick mix structure, deflector type horizontal subsurface flow wetland is provided with water-in and water outlet, be provided with parallel staggered deflected current wall in deflector type horizontal subsurface flow wetland, in deflector type horizontal subsurface flow wetland, be filled with the matrix that adsorptive power is stronger;
The water outlet at settling tank top is provided with diverting valve, the water outlet of settling tank is communicated with the water-in of deflector type horizontal subsurface flow wetland with the water inlet pipe A of aeration vertical subsurface flow wetland respectively by diverting valve, the branch drain A of aeration vertical subsurface flow wetland is also communicated with the water-in of deflector type horizontal subsurface flow wetland, water storage oxygenation pond is provided with water-in and water outlet, the water outlet of deflector type horizontal subsurface flow wetland is communicated with the water-in of ultraviolet sterilizer, the water outlet of ultraviolet sterilizer is communicated with the water-in of water storage oxygenation pond, and water storage oxygenation pond is provided with microporous aeration disc.
The bottom casting concrete base plate of aeration vertical subsurface flow wetland, concrete floor tilts, the scarp of concrete floor and the angle of aeration vertical subsurface flow wetland bottom surface are 3 ‰ ~ 10 ‰, concrete floor near the side of the water-in of aeration vertical subsurface flow wetland higher than near the water outlet side of aeration vertical subsurface flow wetland, each water distributor tilts, the angle of each water distributor and horizontal plane is 3 ‰ ~ 10 ‰, one end that each water distributor is communicated with water inlet pipe B is higher than the other end closed, the angle of deflector type horizontal subsurface flow wetland bottom surface and horizontal plane is 3 ‰ ~ 10 ‰, deflector type horizontal subsurface flow wetland bottom surface near the side of its water-in higher than near the side of its water outlet.
Be filled with the matrix of three layers of different-grain diameter in aeration vertical subsurface flow wetland, the particle diameter of three layers of matrix reduces from the bottom up successively.
Branch drain A is provided with the evacuated tube be communicated with branch drain A, evacuated tube is positioned at the top of branch drain A and is positioned at outside aeration vertical subsurface flow wetland, evacuated tube is provided with equally spaced outlet valve, for regulating and controlling idle periods wetland water level inside, prevents wetland plant withered dead.
The bottom of anaerobic fixed film reactor and settling tank is equipped with sewage sump, the bottom surface of settling tank is higher than the bottom surface of anaerobic fixed film reactor, the bottom of settling tank is communicated with anaerobic fixed film reactor by tilted tube, the bottom of anaerobic fixed film reactor is provided with sludge pump, and anaerobic fixed film reactor is communicated with the water-in of Microfilter by sludge pump.
In aeration vertical subsurface flow wetland, plantation has vascular plant, and described vascular plant is reed or Arundo donax.
In deflector type horizontal subsurface flow wetland, plantation has shallow root hygrophyte, and described shallow root hygrophyte is Canna generalis Bailey or Rush.
Described matrix is porous ceramic grain.
Compared with prior art, its beneficial effect and advantage are in the present invention:
1, this device with the removal of the suspended solids in industrialized aquiculture tail water, oxygen consumption organic, ammonia nitrogen, nitre nitrogen and nitrite nitrogen etc. for core, according to main Approach of Removal of Nitrogen---the nitrated/denitrification of current wetland process low stain water body, the denitrification function of the strong nitrification function of aeration vertical subsurface flow wetland and horizontal subsurface flow wetland is organically combined, efficiently remove problem while successfully solving ammonia nitrogen, nitre nitrogen or nitrite nitrogen, increase substantially nitric efficiency.
2, this device aeration vertical subsurface flow wetland and deflector type horizontal subsurface flow wetland treatment stage before set up Microfilter, anaerobic fixed film reactor, the facilities such as settling tank, both ensure that solid-liquid separation, greatly reduce the solid particulate matter level in cultivation tail water, reduce the risk of aeration vertical subsurface flow wetland and the blocked and solid particulate matter excess load of deflector type horizontal subsurface flow wetland, the remaining organism will filtered through Microfilter again, macromole hardly degraded organic substance successful hydrolysis becomes small-molecule substance, for the denitrification process of follow-up deflector type horizontal subsurface flow wetland provides available carbon source.
3, this device is nitrated, these two nutrition of denitrification, the totally different nitrogen degradation process of dissolved oxygen requirement enhances condition needed for each autoreaction respectively.Filled the stronger matrix of adsorptive power by bottom aeration, bottom water outlet, plantation vascular plant, grade separation, expand matrix depth of cracking closure, configured the strong nitrification that the measures such as dissolved oxygen measuring and control device ensure aeration vertical subsurface flow wetland, configuration dissolved oxygen measuring and control device can also provide safeguard for energy saving of system runs; By building deflector type horizontal subsurface flow wetland, extending sewage flow process, filling the matrix that adsorptive power is stronger, increase the duration of contact of dirt and matrix, plantation shallow root hygrophyte, ensures hydraulic detention time, and then ensures fully carrying out of denitrification.
4, this device has fully utilized the organic carbon source in cultivation tail water while denitrogenation, has rationally disposed the solid particulate matter separated simultaneously, effectively achieves the object of cultivation tail water recycle and solid waste resource recovery recycling; System external, without any tail water and solid waste discharge, expands water circulation and utilizes dynamics, significantly improves water saving, emission reduction effect, has saved water resources, has protected environment.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of industrialized aquiculture tail water efficient denitrification device provided by the invention.
Fig. 2 is the structural representation of aeration vertical subsurface flow wetland in industrialized aquiculture tail water efficient denitrification device provided by the invention.
Fig. 3 is the intake-discharge pipe layout of aeration vertical subsurface flow wetland in industrialized aquiculture tail water efficient denitrification device provided by the invention.
Fig. 4 is the structural representation of deflector type horizontal subsurface flow wetland in industrialized aquiculture tail water efficient denitrification device provided by the invention.
Fig. 5 is the vertical view of Fig. 4.
1-Microfilter, 2-anaerobic fixed film reactor, 3-settling tank, 4-aeration vertical subsurface flow wetland, 5-deflector type horizontal subsurface flow wetland, 6-ultraviolet sterilizer, 7-water storage oxygenation pond, 8-matrix, 9-water inlet supervisor (comprising water inlet pipe A (9a) and water inlet pipe B (9b)), 10-water distributor, 11-header, 12-drain header (comprising branch drain A (12a) and branch drain B (12b)), 13-vertical tube, 14-plastic hose, 15-nanometer micropore aeration tube, 16-dissolved oxygen measurement and control host computer, 17-gas blower, the total air-supply duct of 18-, 19-dissolved oxygen observing and controlling sensor, 20-deflected current wall, 21-diverting valve, 22-concrete floor, 23-evacuated tube, 24-outlet valve, 25-vascular plant, 26-shallow root hygrophyte.
Embodiment
Below in conjunction with accompanying drawing, the present invention is specifically described.
The structure of industrialized aquiculture tail water efficient denitrification device provided by the invention as shown in Figure 1, at least comprises Microfilter 1, anaerobic fixed film reactor 2, settling tank 3, aeration vertical subsurface flow wetland 4, deflector type horizontal subsurface flow wetland 5, ultraviolet sterilizer 6 and water storage oxygenation pond 7.The water-in of Microfilter 1 is communicated with the water port of cultivation fish pond, and the water inlet position of Microfilter 1 is lower than the water port position of cultivation fish pond, and being convenient to water like this can flow into voluntarily.The water port of Microfilter 1 is communicated with the water-in of anaerobic fixed film reactor 2, and the water port at anaerobic fixed film reactor 2 top is communicated with the water-in bottom settling tank 3.The bottom of anaerobic fixed film reactor 2 and settling tank 3 is equipped with sewage sump, the bottom surface of settling tank 3 is higher than the bottom surface of anaerobic fixed film reactor 2, the bottom of settling tank 3 is communicated with anaerobic fixed film reactor 2 by tilted tube, and the mud be convenient to bottom settling tank enters in anaerobic fixed film reactor and precipitates.The bottom of anaerobic fixed film reactor 2 is provided with sludge pump, and anaerobic fixed film reactor 2 is communicated with by the water-in of sludge pump with Microfilter 1, is regularly filtered to Microfilter 1 by the sludge lifting of accumulation in anaerobic fixed film reactor 2.In the present embodiment, Microfilter 2 is box rotary drum Microfilter, filtering accuracy 30 ~ 130 μm, flow 30 ~ 120m 3/ h.Anaerobic fixed film reactor 2, settling tank 3 are all arranged on underground, and wherein anaerobic fixed film reactor 2 is buried pond.Anaerobic fixed film reactor 2 is of a size of 8m length × 4m, and wide × 4m is dark, and settling tank 3 is of a size of 5m length × 4m, and wide × 3m is dark, and the hydraulic detention time of anaerobic fixed film reactor 2 and settling tank 3 is respectively 6.4h and 3.0h.
Described aeration vertical subsurface flow wetland 4 is the pond of brick mix structure, as shown in Figure 2.Aeration vertical subsurface flow wetland 4 sidewall relative position is provided with water-in and water port, the water-in of aeration vertical subsurface flow wetland 4 is positioned at the top of aeration vertical subsurface flow wetland 4 sidewall, and the water port of aeration vertical subsurface flow wetland 4 is positioned at the bottom of aeration vertical subsurface flow wetland 4 sidewall.The bottom of aeration vertical subsurface flow wetland 4 adopts concrete placement concrete floor, concrete floor 22 tilts, the scarp of concrete floor 22 and the angle of aeration vertical subsurface flow wetland 4 bottom surface are 3 ‰ ~ 10 ‰, concrete floor 22 near the side of the water-in of aeration vertical subsurface flow wetland 4 higher than its water outlet side near aeration vertical subsurface flow wetland 4.The inside of aeration vertical subsurface flow wetland 4 is filled with the stronger matrix of adsorptive power 8, and matrix 8 depth of cracking closure, higher than conventional depth (being generally 0.6 ~ 1.0m), is convenient to the time and the flow process that increase aqueous vapor contact.
Aeration vertical subsurface flow wetland 4 top is provided with the T-shaped water inlet supervisor 9 of horizontal positioned, water inlet supervisor 9 comprises water inlet pipe A 9a and water inlet pipe B 9b, water inlet pipe A 9a is communicated with the middle part of water inlet pipe B 9b, and water inlet pipe A 9a is through the water-in of aeration vertical subsurface flow wetland 4.The top of aeration vertical subsurface flow wetland 4 is provided with the water distributor 10 that a row equidistantly arranges, and one end of each water distributor 10 is communicated with water inlet pipe B 9b and perpendicular to water inlet pipe B 9b, the other end is closed.Each water distributor 10 tilts, and each water distributor 10 is 3 ‰ ~ 10 ‰ with the angle of horizontal plane, and one end that each water distributor 10 is communicated with water inlet supervisor 9 is higher than the other end closed.The bottom of water distributor 10 and the top contact of matrix 8, the bottom of water distributor 10 is drilled with the above water vent of two rows.The bottom of aeration vertical subsurface flow wetland 4 is provided with the header 11 that a row equidistantly arranges, and the part that header 11 contacts with matrix 8 is drilled with the above prosopyle of three rows.Bottom aeration vertical subsurface flow wetland 4, side is provided with the drain header 12 of horizontal positioned, drain header 12 comprises branch drain A 12a and branch drain B 12b, branch drain A 12a is communicated with the middle part of branch drain B 12b, branch drain B 12b is parallel to water inlet pipe B 9b, and branch drain A 12a is through the water port of aeration vertical subsurface flow wetland 4.The layout of the intake-discharge pipe of this device as shown in Figure 3.Branch drain A 12a is provided with the evacuated tube 23 be communicated with branch drain A 12a, and evacuated tube 23 is positioned at the top of branch drain A 12a and is positioned at outside aeration vertical subsurface flow wetland 4, and evacuated tube 23 is provided with equally spaced outlet valve 24.Be provided with near aeration vertical subsurface flow wetland 4 side-walls the vertical tube 13 that a row equidistantly arranges, vertically places in aeration vertical subsurface flow wetland 4, vertical tube top 13 is higher than matrix 8 surface and end sealing.One end of each header 11 is communicated with branch drain B 12b and perpendicular to branch drain B 12b, the vertical tube 13 that the other end is corresponding with this water shoot is communicated with.Be interspersed with plastic hose 14 in each vertical tube 13, in each header 11, be provided with nanometer micropore aeration tube 15.The outer of aeration vertical subsurface flow wetland 4 is arranged with dissolved oxygen measurement and control host computer 16 and gas blower 17, the air outlet place of gas blower 17 is connected with total air-supply duct 18, one end of each plastic hose 14 is communicated with total air-supply duct 18, the nanometer micropore aeration tube 15 that the other end is corresponding with this plastic hose 14 is communicated with, drain header 12 and aeration vertical subsurface flow wetland 4 water port junction are provided with dissolved oxygen observing and controlling sensor 19, dissolved oxygen observing and controlling sensor 19 is connected with dissolved oxygen measurement and control host computer 16, and dissolved oxygen measurement and control host computer 16 is connected with gas blower 17.In the present embodiment, aeration vertical subsurface flow wetland 4 is rectangular pond, and it is of a size of 10m length × 8m, and wide × 1.8m is dark.Water-in and water port lay respectively on the relative sidewall of aeration vertical subsurface flow wetland 4.The porous ceramic grain of three layers of different size is filled in aeration vertical subsurface flow wetland 4 inside, and three layers of particle diameter are followed successively by 30 ~ 50mm, 15 ~ 30mm, 5 ~ 15mm from bottom to top, and thickness is followed successively by 50cm, 50cm, 60cm, total depth 1.6m.Porous ceramic grain mean porosities is 0.45, hydraulic load 2.0m/d, and hydraulic detention time is 8.6h.Matrix 8 surface plantation vascular plant 25 reed, vascular plant 25 takes root that ability is strong, and its root can go deep into and be covered with in hypothallus, vascular plant 25 can by vascular bundle by oxygen delivery to plant root, be hypothallus supplemental oxygen.
The diameter of water distributor 10 is 75mm, in water inlet supervisor 9, the diameter of water inlet pipe A 9a and water inlet pipe B 9b is 110mm, the diameter of header 11 and vertical tube is 75mm, the diameter of evacuated tube 23 is 160mm, the diameter of total air-supply duct 18 is 50mm, the internal diameter of plastic hose 14 is 10mm, external diameter is 13mm, and the internal diameter of nanometer micropore aeration tube 15 is 10mm, external diameter is 15mm.In drain header 12, the diameter of branch drain A 12a and branch drain B 12b is 160mm.The bottom of water distributor 10 is drilled with the water vent of two trestle column 10 ~ 20cm, diameter 5 ~ 6mm, and each water distributor 10 is 3 ‰ with the angle of horizontal plane, and concrete floor 22 is 3 ‰ with the angle of aeration vertical subsurface flow wetland 4 bottom surface.Header 11 is drilled with the prosopyle of three trestle column 10 ~ 15cm, diameter 5 ~ 6mm.Nanometer micropore aeration tube 15 is suitable with the length of header 11.The material of all water pipes is PVC.
The parameters of gas blower 17: power 1.6kW; Air output 150m 3/ h; Air pressure 28kPa.According to the oxygen limit that dissolved oxygen measurement and control host computer 16 is arranged, oxygen limit is set as 1.5 ~ 3.0mg/L, automatically opens lower than oxygen gas blower 17 of prescribing a time limit, and automatically stops in limited time higher than oxygen.
Described deflector type horizontal subsurface flow wetland 5 is the pond of brick mix structure, as shown in Figure 4 and Figure 5.Deflector type horizontal subsurface flow wetland 5 is provided with water-in and water outlet.Parallel staggered deflected current wall 20 is provided with in deflector type horizontal subsurface flow wetland 5, deflected current wall 20 makes the water baffling entering deflector type horizontal subsurface flow wetland 5, extend sewage flow process, add the duration of contact of sewage and matrix 8, also can prevent wetland bed interior " short flow phenomenon " simultaneously, improve wetland bed utilising efficiency.The stronger matrix of adsorptive power 8 is filled with in deflector type horizontal subsurface flow wetland 5, the angle of deflector type horizontal subsurface flow wetland 5 bottom surface and horizontal plane is 3 ‰ ~ 10 ‰, deflector type horizontal subsurface flow wetland 5 bottom surface near the side of its water-in higher than near the side of its water outlet.In the present embodiment, deflector type horizontal subsurface flow wetland 5 is rectangular pond, and it is of a size of 21m length × 8m, and wide × 1.2m is dark, and the angle of deflector type horizontal subsurface flow wetland 5 bottom surface and horizontal plane is 3 ‰, and bottom adopts concrete placement.Matrix 8 is porous ceramic grain, porosity 0.45, depth of cracking closure 1.0m.Deflector type horizontal subsurface flow wetland 5 average hydraulic load is 1.2m/d, hydraulic detention time 9.1h.Matrix 8 surface plantation shallow root hygrophyte 26 Canna generalis Bailey in deflector type horizontal subsurface flow wetland 5.
The water outlet at settling tank 3 top is provided with diverting valve 21, the water outlet of settling tank 3 is communicated with the water-in of deflector type horizontal subsurface flow wetland 5 with the water inlet pipe A 9a of aeration vertical subsurface flow wetland 4 respectively by diverting valve 21, the branch drain A 12a of aeration vertical subsurface flow wetland 4 is also communicated with the water-in of deflector type horizontal subsurface flow wetland 5, water storage oxygenation pond 7 is provided with water-in and water outlet, the water outlet of deflector type horizontal subsurface flow wetland 5 is communicated with the water-in of ultraviolet sterilizer 6, the water outlet of ultraviolet sterilizer 6 is communicated with the water-in of water storage oxygenation pond 7, microporous aeration disc is provided with in water storage oxygenation pond 7, the water that water storage oxygenation pond 7 water outlet flows out is used as aquaculture water more again.In the present embodiment, the rated flow of ultraviolet sterilizer 6 is 43 ~ 46m 3/ h; Water storage oxygenation pond 7 is of a size of 4m length × 2m, and wide × 2m is dark, installs 5 nanometer micropore aeration plates in pond, and the gas blower that nanometer micropore aeration plate is used for fishpond oxygenation with indoor is connected.
The method of industrialized aquiculture tail water efficient denitrification device provided by the invention denitrogenation is as follows:
1) aquaculture tail water Microfilter is filtered, filter cake is used as flowers base manure after water extracter squeezing mummification, filtrate enters into anaerobic fixed film reactor from the outlet of Microfilter through pipeline, the larger molecular organics of the difficult degradation in degraded filtrate, water outlet in anaerobic fixed film reactor enters into settling tank from the water outlet at anaerobic fixed film reactor top through pipeline, the mud in precipitation sewage.
2) water outlet in settling tank is shunted by the diverting valve of settling tank water outlet, part water outlet enters in aeration vertical subsurface flow wetland water inlet supervisor, enter in matrix by the water vent of water distributor, ammonia nitrogen in matrix absorption effluent, nitre nitrogen and nitrite nitrogen etc., ammonia nitrogen, nitre nitrogen and nitrite nitrogen etc. are collected in matrix, there is provided oxygen to aeration vertical subsurface flow wetland continuously by controlling gas blower simultaneously, oxygen is upwards spread from the bottom of aeration vertical subsurface flow wetland by nanometer micropore aeration tube and header, nitrification for the microorganism in matrix provides oxygen and inorganic carbon source (carbonic acid gas), another part water outlet and flow in deflector type horizontal subsurface flow wetland through the mixing of aeration vertical subsurface flow wetland treated water and carry out the nitrification of microorganism (based on heterotrophic denitrification, also may with short distance nitration/denitrification, Anammox (ANAMMOX) etc.), the flooding quantity wherein flowing directly into deflector type horizontal subsurface flow wetland by diverting valve generally accounts for 10% ~ 90% of the total aquifer yield of settling tank, specifically determines according to the Nitrification intensity of the organism in settling tank water outlet, ammonia nitrogen level, aeration vertical subsurface flow wetland and organic matter degradation situation.
3) water outlet of deflector type horizontal subsurface flow wetland enters ultraviolet sterilizer, carries out germicidal treatment, and the water outlet of ultraviolet sterilizer enters water storage oxygenation pond, passes back into culturing area fishpond and carry out reuse after aeration aerating.
Series of experiments proves that this device is applicable to the regulation and control of high-quality fish high-density breeding water quality, can ensure hybrid sturgeon breeding water demand.Sturgeon cultivates tail water after this device process, to TN, NH 4 +-N, NO 2 --N and COD mnclearance respectively up to 71.3 ~ 88.1%, 69.2 ~ 73.5%, 73.6 ~ 81.7% and 75.9 ~ 89.4%, after water storage oxygenation pond aeration aerating, dissolved oxygen reaches more than 5mg/L, meets sturgeon breeding water demand.

Claims (8)

1. an industrialized aquiculture tail water efficient denitrification device, at least comprise Microfilter (1), anaerobic fixed film reactor (2), settling tank (3), ultraviolet sterilizer (6) and water storage oxygenation pond (7), it is characterized in that: also comprise aeration vertical subsurface flow wetland (4) and deflector type horizontal subsurface flow wetland (5), Microfilter (1) is installed on the water port place of cultivation fish pond, the position of Microfilter (1) is lower than the position of the water port of cultivation fish pond, the water-in of Microfilter (1) is communicated with the water port of cultivation fish pond, the water port of Microfilter (1) is communicated with the water-in of anaerobic fixed film reactor (2), the water port at anaerobic fixed film reactor (2) top is communicated with the water-in of settling tank (3),
The pond that described aeration vertical subsurface flow wetland (4) is brick mix structure, aeration vertical subsurface flow wetland (4) sidewall relative position is provided with water-in and water port, the water-in of aeration vertical subsurface flow wetland (4) is positioned at the top of aeration vertical subsurface flow wetland (4) sidewall, the water port of aeration vertical subsurface flow wetland (4) is positioned at the bottom of aeration vertical subsurface flow wetland (4) sidewall, the inside of aeration vertical subsurface flow wetland (4) is filled with the stronger matrix of adsorptive power (8), aeration vertical subsurface flow wetland (4) top is provided with T-shaped water inlet supervisor (9) of horizontal positioned, water inlet supervisor (9) comprises water inlet pipe A (9a) and water inlet pipe B (9b), water inlet pipe A (9a) is communicated with the middle part of water inlet pipe B (9b), water inlet pipe A (9a) is through the water-in of aeration vertical subsurface flow wetland (4), the top of aeration vertical subsurface flow wetland (4) is provided with the water distributor (10) that a row equidistantly arranges, one end of each water distributor (10) is communicated with water inlet pipe B (9b) and perpendicular to water inlet pipe B (9b), the other end is closed, the bottom of water distributor (10) and the top contact of matrix (8), the bottom of water distributor (10) is provided with the above water vent of two rows, the bottom of aeration vertical subsurface flow wetland (4) is provided with the header (11) that a row equidistantly arranges, the upper part contacted with matrix (8) of header (11) is drilled with the above prosopyle of three rows, side, aeration vertical subsurface flow wetland (4) bottom is provided with the T-shaped drain header (12) of horizontal positioned, drain header (12) comprises branch drain A (12a) and branch drain B (12b), branch drain A (12a) is communicated with the middle part of branch drain B (12b), branch drain B (12b) is parallel to water inlet pipe B (9b), branch drain A (12a) is through the water port of aeration vertical subsurface flow wetland (4), be provided with a row near aeration vertical subsurface flow wetland (4) side-walls in aeration vertical subsurface flow wetland (4) equidistantly to arrange, the vertical tube (13) of vertical placement, vertical tube (13) higher than matrix (8) surface and end sealing, one end of each header (11) is communicated with branch drain B (12b) and perpendicular to branch drain B (12b), the vertical tube (13) that the other end is corresponding with this water shoot is communicated with, plastic hose (14) is interspersed with in each vertical tube (13), nanometer micropore aeration tube (15) is provided with in each header (11), the outer of aeration vertical subsurface flow wetland (4) is arranged with dissolved oxygen measurement and control host computer (16) and gas blower (17), the air outlet place of gas blower (17) is connected with total air-supply duct (18), one end of each plastic hose (14) is communicated with total air-supply duct (18), the nanometer micropore aeration tube (15) that the other end is corresponding with this plastic hose (14) is communicated with, drain header (12) and aeration vertical subsurface flow wetland (4) water port junction are provided with dissolved oxygen observing and controlling sensor (19), dissolved oxygen observing and controlling sensor (19) is connected with dissolved oxygen measurement and control host computer (16), dissolved oxygen measurement and control host computer (16) is connected with gas blower (17),
The pond that described deflector type horizontal subsurface flow wetland (5) is brick mix structure, deflector type horizontal subsurface flow wetland (5) is provided with water-in and water outlet, be provided with parallel staggered deflected current wall (20) in deflector type horizontal subsurface flow wetland (5), in deflector type horizontal subsurface flow wetland (5), be filled with the stronger matrix of adsorptive power (8);
The water outlet at settling tank (3) top is provided with diverting valve (21), the water outlet of settling tank (3) is communicated with the water-in of deflector type horizontal subsurface flow wetland (5) with the water inlet pipe A (9a) of aeration vertical subsurface flow wetland (4) respectively by diverting valve (21), the branch drain A (12a) of aeration vertical subsurface flow wetland (4) is also communicated with the water-in of deflector type horizontal subsurface flow wetland (5), the water outlet of deflector type horizontal subsurface flow wetland (5) is communicated with the water-in of ultraviolet sterilizer (6), the water outlet of ultraviolet sterilizer (6) is communicated with the water-in of water storage oxygenation pond (7), water storage oxygenation pond (7) is provided with microporous aeration disc.
2. industrialized aquiculture tail water efficient denitrification device according to claim 1, it is characterized in that: bottom casting concrete base plate (22) of aeration vertical subsurface flow wetland (4), concrete floor (22) tilts, the scarp of concrete floor (22) and the angle of aeration vertical subsurface flow wetland (4) bottom surface are 3 ‰ ~ 10 ‰, the side of the water-in of the close aeration vertical subsurface flow wetland (4) of concrete floor (22) is higher than the water outlet side near aeration vertical subsurface flow wetland (4), each water distributor (10) tilts, each water distributor (10) is 3 ‰ ~ 10 ‰ with the angle of horizontal plane, one end that each water distributor (10) is communicated with water inlet pipe B (9b) is higher than the other end closed, the angle of deflector type horizontal subsurface flow wetland (5) bottom surface and horizontal plane is 3 ‰ ~ 10 ‰, deflector type horizontal subsurface flow wetland (5) bottom surface near the side of its water-in higher than near the side of its water outlet.
3. industrialized aquiculture tail water efficient denitrification device according to claim 1, it is characterized in that: the matrix (8) being filled with three layers of different-grain diameter in aeration vertical subsurface flow wetland (4), the particle diameter of three layers of matrix (8) reduces from the bottom up successively.
4. industrialized aquiculture tail water efficient denitrification device according to claim 1, it is characterized in that: branch drain A (12a) is provided with the evacuated tube (23) be communicated with branch drain A (12a), evacuated tube (23) is positioned at the top of branch drain A (12a) and is positioned at aeration vertical subsurface flow wetland (4) outward, and evacuated tube (23) is provided with equally spaced outlet valve (24).
5. industrialized aquiculture tail water efficient denitrification device according to claim 1, it is characterized in that: the bottom of anaerobic fixed film reactor (2) and settling tank (3) is equipped with sewage sump, the bottom surface of settling tank (3) is higher than the bottom surface of anaerobic fixed film reactor (2), the bottom of settling tank (3) is communicated with anaerobic fixed film reactor (2) by tilted tube, be provided with sludge pump in the bottom sewage sump of anaerobic fixed film reactor (2), anaerobic fixed film reactor (2) is communicated with by the water-in of sludge pump with Microfilter (1).
6. industrialized aquiculture tail water efficient denitrification device according to claim 1, it is characterized in that: in aeration vertical subsurface flow wetland (4), plantation has vascular plant (25), and described vascular plant (25) is reed or Arundo donax.
7. industrialized aquiculture tail water efficient denitrification device according to claim 1, it is characterized in that: in deflector type horizontal subsurface flow wetland (5), plantation has shallow root hygrophyte (26), and described shallow root hygrophyte (26) is Canna generalis Bailey or Rush.
8. industrialized aquiculture tail water efficient denitrification device according to claim 1, is characterized in that: described matrix (8) is porous ceramic grain.
CN201510066695.8A 2015-02-09 2015-02-09 Effective denitrification device of industrial aquaculture tail water Expired - Fee Related CN104591509B (en)

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