CN103553279A - Water treatment device and method for circulating aquaculture system - Google Patents
Water treatment device and method for circulating aquaculture system Download PDFInfo
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- CN103553279A CN103553279A CN201310566886.1A CN201310566886A CN103553279A CN 103553279 A CN103553279 A CN 103553279A CN 201310566886 A CN201310566886 A CN 201310566886A CN 103553279 A CN103553279 A CN 103553279A
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Abstract
The invention relates to a treatment process and device for aquaculture and disinfection and organic removal of circulating cultivation water. The device adopts a static mixer for mixing ozone and is mainly used for sterilization, and the loss of pressure head of the static mixer is less; after being treated in an ultraviolet radiation area, the cultivation water is sterilized and organics are removed, and then the cultivation water enters a biological stuffing reaction area for mainly removing organics. The device integrates ozone dissolution and reaction, has a simple structure, and can be used for sterilizing cultivation water bodies, degrading organics, removing ammonia nitrogen and water color, and increasing dissolved oxygen.
Description
Technical field
The present invention relates to the sterilization of aquaculture and cultivation recirculated water and remove organism treatment process and device.
Background technology
Circulating water cultivation is the development trend of following aquaculture, yet because of the high-density high capacity of its cultivation and the high cyclic utilization rate of water, makes the difficulty of water surrounding regulation and control strengthen; And due to the recycling of water, if aquaculture water is brought cause of disease into, aquaculture organism repeats to contact with cause of disease for a long time, increase cultivation risk.Therefore, in circulating water culture system, water body disinfection and organic matter removal are necessary processing links.
Ozone is a kind of strong oxidizer and sterilizing agent, be proved and can have killed fast and effectively virus, bacterium and protozoon in aquaculture water, but also the organism of oxidable difficult for biological degradation and nitrate, contribute to recycle system solid particulate to remove, be conducive to strengthen the stability of recycle system operation.Yet ozone carries out that the different processing required dosages of removing targets are not identical, and sterilization and disinfection is processed and is subject to mass transfer velocity to control (rapid reaction), and degradation of organic substances and ammonia nitrogen etc. is subject to chemical reaction velocity to control (slow reaction).At present the external main oxygen cone that adopts dissolves, and dissolved efficiency is high, have certain stops duration of contact, but it belongs to pressure dissolving, and energy consumption is higher; Domestic main employing ejector dissolves, and installs easylier, and dissolved efficiency is higher, but flow is restricted, and treatment capacity is little, and energy consumption is higher.And both all only consider the dissolved efficiency aspect influence factor of ozone, do not consider ozone is controlled by chemical reaction velocity influence factor at degradation of organic substances and ammonia nitrogen etc.
Summary of the invention
The present invention aims to provide a kind of water technology of water treatment device and circulating water culture system for circulating water culture system, to solve, in existing water treatment device, in ozone application, energy consumption is high, treatment capacity is little, need be compared with long residence time aspect degradation of organic substances, the problem such as plant area is large.
Technical scheme is as follows:
For a water treatment device for circulating water culture system, structure comprises the casing of sealing, and box house is ultraviolet radiation zone and two of biologic packing material reaction zones cavity by vertical baffle for separating; Dividing plate lower end and both sides are fixed on casing, and the distance at dividing plate upper end and casing top is 5～10cm;
The static mixer of tubulose is configured in the side that deviates from dividing plate in ultraviolet radiation zone, top is water-in and ozone inlet mouth, is fixed on the top of casing, and below is outlet, leave distance with the bottom of casing, the outlet of static mixer and the distance of bottom half are box height 10%～20%;
Described static mixer is SV type static mixer, preferred, and its structure is, static mixer inside is comprised of a plurality of mixed cells, and each mixed cell replaces overlapping forming by the waved plate of V-structure, and the ripple vergence direction of adjacent two waved plates is contrary; Wavy channel between adjacent mixed cell is 90 degree angles; The structure of this static mixer can form convection current cutting and mixing effect, makes that recirculated water and ozone are full and uniform to be mixed;
The external ozone of ozone inlet mouth adds source of the gas;
The outlet at bottom of static mixer passes into ultraviolet radiation zone;
Vertical distribution ultraviolet lamp tube in ultraviolet radiation zone, ultraviolet lamp tube top is fixed on the top of casing, and bottom is placed on box bottom; The length of ultraviolet lamp tube is 0.9～1.5m, and its spacing is radiation radius 1.8～2.1, is preferably 2 times of radiation radius;
Biologic packing material reaction zone is divided into the biologic packing material layer on top and the exhalant region of bottom in the horizontal direction, between the two with orifice plate interval; The aperture that distributes on orifice plate, the diameter 6～10mm of aperture, the spacing between adjacent aperture center is 15～30mm;
The cavity filling that biologic packing material layer is 12～50mm by diameter forms, and the height of biologic packing material layer is 30～80cm; The distance of top and dividing plate upper end is 5～20cm;
The volumetric ratio of biologic packing material reaction zone, uv-radiation region is 1:0.8～1:20, is preferably 1:1～1:10;
Exhalant region is communicated with the water outlet of lower box, and the position of dividing plate is higher than water outlet.
Preferably, the bottom of ultraviolet radiation zone is provided with evacuation port, and exhaust port is offered at the top of biologic packing material reaction zone.
On ozone inlet mouth, be provided with check valve, prevent aqueous reflux phenomenon.
The water technology of circulating water culture system, comprises the steps:
(1) utilize above-mentioned device, make breeding wastewater flow into static mixer through water-in, at ozone inlet mouth, place adds ozone, and intake pressure is controlled to 0.015～0.03Mpa, and charge flow rate is 0.08～0.15m
3/ h, gas-water ratio (volume ratio)
For 1:40～1:100, the ratio of the dosage of unit time ozone and unit time breeding wastewater treatment capacity is 1.0～3.0g/m
3;
(2) ozone is dissolved in breeding wastewater in static mixer, in ultraviolet radiation zone, through ultra violet lamp, overflows flow into biologic packing material reaction zone from the gap between dividing plate upper end and casing top; Breeding wastewater after biologic packing material filtration treatment enters exhalant region, then flows out through water outlet; The tail gas in ultraviolet radiation zone and biologic packing material district is discharged by exhaust port.
Breeding wastewater residence time in device is 5～10min.
This device is mainly used in water body disinfection and organism ammonia nitrogen removal, is to take sterilization as main in static mixer, and sterilization and organic matter removal are taken into account in ultraviolet radiation zone, and organic matter removal be take as main in biologic packing material district.This device is integrated ozone solution with reacting, by static mixer, carrying out adding of ozone dissolves in, static mixer loss of pressure head little (ejector loss of pressure head is generally 8 times of left and right of static mixer), mixture homogeneity reaches more than 99%, but the ozone gas adding needs certain pressure, general control more than 0.02Mpa just, because ozonizer adopts the air source of the gas of liquid oxygen source or compressor generation all with certain pressure (general >0.1Mpa), therefore making full use of air inlet is derived from band pressure and just can satisfies the demand, without other extra means.
By after static mixer combination treatment, the ozone water that is mingled with dissolved ozone not under up by ultraviolet lamp radiation zone.Under ultraviolet catalytic effect, ozone further reacts and generates the stronger hydroxyl of oxidisability, accelerates the speed of its degradation of organic substances, reduces organic selectivity, improves the scope of processing object, also can accelerate the speed of sterilization on the one hand; On the other hand, reduce the concentration of ozone in tail gas, improve the security of device.
After process ultraviolet radiation zone, enter biologic packing material reaction zone, biologic packing material is generally selected cavity filling, and object is enlarge active surface, keeps certain residence time, is beneficial to organic matter degradation and ammonia nitrogen removal etc.Breeding wastewater is after former roads link is processed, for high saturated dissolved oxygen state, be conducive to aerobic reaction, disinfection efficiency at this link region ozone reduces, active poor microbial film will be removed, highly active microbial film will retain, and keep microorganism on filler in highly active increased logarithmic phase, to improve the processing efficiency of organism and ammonia nitrogen.
Beneficial effect of the present invention is:
1, this apparatus structure is simple, applies easyly, and diverse in function, can be to the aquaculture water sterilising treatment that carries out disinfection, and can degradation of organic substances, removes ammonia nitrogen and water colour, increases dissolved oxygen.In traditional method, the ejector energy consumption of use is high, and loss of pressure head is large, and treatment capacity is little; Adopt static mixer to carry out ozone and add, carry out ozone mixed dissolution and possess larger water treatment amount compared to devices such as ejectors, lower power loss, mixed dissolution efficiency obviously improves.This device is 4m in treatment capacity
3in the situation of/h, it is 0.2Mpa that ozone adds bleed pressure, and airshed is 0.1m
3during/h; The dissolved efficiency of ejector is 51%, and the static mixer of this device is 72%.
2, this treatment process adopts the stronger hydroxyl of ultraviolet lamp radiation catalysis ozone generation oxidisability, by hydroxyl, carry out purification of water quality processing, improve the chemical reaction velocity with organic pollutant, the selectivity of reduction to organic pollutant, this device possessed advantages such as organic matter removal efficiency are high, applied widely, the residence time is short, solved traditional chemical speed of reaction and controlled reaction needed compared with long residence time, problem that plant area is large.But also improve disinfection efficiency, reduce the required CT value of sterilization, under the condition of identical sterilization residence time T, can reduce ozone concn C, this means minimizing ozone dosage, reduce running cost, reduce the generations such as disinfection byproduct (DBP) bromate, also reduce ozone content in tail gas simultaneously, improve ozone utilization rate.And utilizing the biologic packing material in another cavity of reactor to carry out a biological disposal upon, the by product oxygen of ozone reaction, for meeting the dissolved oxygen demand of biological treatment, can meet the different treatment requirement of water body disinfection and organic matter removal.
3, by adjusting the residence time, meet the processing requirements of different quality, and solve ozone chemical reaction velocity when degraded different concns organic pollutant and control different problems, improve the utilization ratio of ozone.
Accompanying drawing explanation
Fig. 1 is the longitudinal sectional view of apparatus of the present invention
Fig. 2 is the vertical view of apparatus of the present invention
Fig. 3 is the structural representation of static mixer mixed cell
Fig. 4 is the structural representation of static mixer
1-casing, 101-water-in, 102-ozone inlet mouth, 105-evacuation port, 106-exhaust port, 107-water outlet, 2-ultraviolet radiation zone, 3-static mixer, 301-mixed cell, 302-waved plate, 303-wavy channel, 4-ultraviolet lamp tube, 5-biologic packing material reaction zone, 6-exhalant region, 7-biologic packing material, 8-dividing plate, 9-orifice plate
Embodiment
Below in conjunction with accompanying drawing, embodiment provided by the invention is elaborated.
Embodiment 1
As depicted in figs. 1 and 2, a kind of water treatment device for circulating water culture system, its structure is the casing of sealing, box house is ultraviolet radiation zone and two of biologic packing material reaction zones cavity by vertical baffle for separating, dividing plate lower end is fixed on base plate, and dividing plate upper end and casing distance from top are 5～10cm.Ultraviolet radiation zone and biologic packing material reaction zone are only communicated with the gap between casing top by dividing plate upper end.
The static mixer 3 of tubulose is configured in the side that deviates from dividing plate in ultraviolet radiation zone, top is water-in 101 and ozone inlet mouth 102, be fixed on the top of casing, below is outlet, leave distance with the bottom of casing, the outlet of static mixer and the distance of bottom half are box height 10%～20%; Recirculated water enters static mixer by water-in, and ozone gas enters static mixer from ozone inlet mouth, is dissolved in recirculated water in static mixer.
The structure of SV type static mixer as shown in Figure 3 and Figure 4, is comprised of a plurality of mixed cells 301, and each mixed cell is that the waved plate 302 by V-structure replaces the overlapping cylinder forming, and the ripple vergence direction of adjacent two waved plates is contrary; Wavy channel 303 between adjacent mixed cell is 90 degree angles; The structure of this static mixer can form convection current cutting and mixing effect, makes that recirculated water and ozone are full and uniform to be mixed.
The external ozone of ozone inlet mouth adds source of the gas;
The outlet at bottom of static mixer passes into ultraviolet radiation zone;
Vertical distribution ultraviolet lamp tube in ultraviolet radiation zone, ultraviolet lamp tube top is fixed on the top of casing, and the distance of bottom and box bottom is 5mm; The length of ultraviolet lamp tube is 1～1.5m, its spacing is radiation radius 2 times.
Recirculated water flows into ultraviolet radiation zone and is overflowed and flowed into biologic packing material reaction zone by the gap at dividing plate upper end and casing top.
Biologic packing material reaction zone is divided into the biologic packing material layer on top and the exhalant region of bottom in the horizontal direction, between the two with orifice plate interval; The aperture that distributes on orifice plate, the diameter 8mm of aperture, the spacing between adjacent aperture center is 20mm; Orifice plate mainly plays carrying isolation biologic packing material
The cavity filling that biologic packing material layer is 12～50mm by diameter forms, and the height of biologic packing material layer is 60cm; The distance of top and dividing plate upper end is 5cm.
The recirculated water that has dissolved ozone gas flows into ultraviolet radiation zone from static mixer, and because of stopping from the bottom to top under ultra violet lamp of dividing plate, ozone produces the stronger hydroxyl of oxidisability through radiation catalysis, and further sterilization is processed.
Take useful volume 500L device be example, wherein the volumetric ratio of ultraviolet radiation zone and biologic packing material reaction zone is 1:1, the water inlet pipe diameter of static mixer is
length is 80% of box height, ultraviolet lamp tube length 1m, radiation radius 50mm.This unit capacity is 3-6m
3/ h, can be applicable to water body amount is 3m
3～18m
3, in the cycling rate circulating water culture system that is 1h/ time～3h/ time.
During processing, breeding wastewater flows into static mixer through water-in, at ozone inlet mouth 2 places that enter static mixer, add ozone, by under meter, control the flow that adds ozone, and control the pressure of air inlet, general control, at 0.02Mpa, can be installed check valve at inlet mouth, prevents aqueous reflux phenomenon.The unnecessary gas of ultraviolet radiation zone is from exhaust port 106 discharges.Breeding wastewater is after passing through static mixer, and because of the ultraviolet radiation zone of circulating under the effect of ultraviolet lamp tube from the bottom to top that stops of dividing plate, ultraviolet lamp radiation radius is 50mm, and ultraviolet lamp tube quantity is set on this basis.During static mixer water outlet, the flow rate of water flow that flows into ultraviolet radiation zone remains on 0.2m/s left and right.Breeding wastewater enters the biologic packing material reaction zone that biologic packing material is housed after flowing through ultraviolet radiation zone.Breeding wastewater after processing flows out exhalant region, through water outlet, discharges system, and residual tail gas is discharged from exhaust port.
Ozonizer adopts the air source of the gas of liquid oxygen source or compressor generation with >0.1Mpa certain pressure, therefore without extra pressurization.
Said apparatus is 4m in treatment capacity
3in the situation of/h, it is 0.2Mpa(intake pressure 0.02Mpa that ozone adds bleed pressure), airshed is 0.1m
3during/h, the dissolved efficiency of static mixer is 72%; And the dissolved efficiency of ejector is 51%.
Breeding wastewater with certain hybrid sturgeon circulating water culture system is treated to example, after sandfiltration pot filtration treatment, and ammonia nitrogen 5.473mg/L in waste water, nitrite 0.094mg/L, COD25mg/L, water colour 106(units PtCo), 26.5 ℃ of water temperatures, dissolved oxygen 6.95mg/L, take flow as 4m
3/ h access to plant, device ozone dosage is 8g/h, flow is 0.1m
3/ h, intake pressure is 0.02Mpa, and after processing in a manner described, the residence time is 7min, and effluent quality is ammonia nitrogen 5.193mg/L, clearance 5.1%; Nitrite 0.007mg/L, clearance 92.6%; COD13mg/L, clearance 48%; Water colour 62(units PtCo), clearance 41.5%; Dissolved oxygen 13.79mg/L, increases by 198.4%; With process before compare, total plate count declines 90%.
The size range in this district designs according to whole system residence time 5-10min, and according to different cultivation demands, can the water inlet pipe diameter of this device of bi-directional scaling static mixer and the size in biologic packing material district, guarantee that hydraulic detention time is 5-10min.
When device is stopped using, water residual in ultraviolet radiation zone flows out from evacuation port 105.
Claims (9)
1. for a water treatment device for circulating water culture system, it is characterized in that, structure comprises the casing (1) of sealing, and casing (1) inside is ultraviolet radiation zone (2) and (5) two of biologic packing material reaction zones cavity by vertical baffle for separating; Dividing plate lower end and both sides are fixed on casing, and the distance at dividing plate upper end and casing top is 5～10cm;
The static mixer of tubulose (3) is configured in the side that ultraviolet radiation zone deviates from dividing plate, and top is water-in (101) and ozone inlet mouth (102), is fixed on the top of casing; Distance, for outlet, is left with the bottom of casing in below;
Described static mixer is SV type static mixer;
The external ozone of ozone inlet mouth adds source of the gas;
The outlet at bottom of static mixer passes into ultraviolet radiation zone;
Vertical distribution ultraviolet lamp tube in ultraviolet radiation zone, ultraviolet lamp tube top is fixed on the top of casing, and bottom is placed on box bottom; The length of ultraviolet lamp tube is 0.9～1.5m, its spacing is radiation radius 1.8～2.1 times;
Biologic packing material reaction zone is divided into the biologic packing material layer on top and the exhalant region of bottom in the horizontal direction, between the two with orifice plate interval; The aperture that distributes on orifice plate, the diameter 6～10mm of aperture, the spacing between adjacent aperture center is 15～30mm;
The height of biologic packing material layer is 30～80cm; The distance of top and dividing plate upper end is 5～20cm;
The volumetric ratio of biologic packing material reaction zone, uv-radiation region is 1:0.9～1:10;
Exhalant region is communicated with the water outlet of lower box, and the position of dividing plate is higher than water outlet.
Described in claim 1 for the water treatment device of circulating water culture system, it is characterized in that, the bottom of ultraviolet radiation zone is provided with evacuation port, exhaust port is offered at the top of biologic packing material reaction zone.
Described in claim 1 for the water treatment device of circulating water culture system, it is characterized in that, ozone inlet mouth is provided with check valve.
Described in claim 1 for the water treatment device of circulating water culture system, it is characterized in that, the volumetric ratio of biologic packing material reaction zone, uv-radiation region is 1:1～1:10.
Described in claim 1 for the water treatment device of circulating water culture system, it is characterized in that, the spacing of ultraviolet lamp tube is radiation radius 2 times.
Described in claim 1 for the water treatment device of circulating water culture system, it is characterized in that, described SV type static mixer inside is comprised of a plurality of mixed cells, and mixed cell replaces overlapping forming by the waved plate of V-structure, and the ripple vergence direction of adjacent two waved plates is contrary; Wavy channel between adjacent mixed cell is 90 degree angles.
Described in claim 1 for the water treatment device of circulating water culture system, it is characterized in that, the cavity filling that described biologic packing material layer is 12～50mm by diameter forms.
Described in claim 1 for the water treatment device of circulating water culture system, it is characterized in that, the outlet of described static mixer and the distance of bottom half are box height 10%～20%.
9. the water technology of circulating water culture system, is characterized in that, comprises the steps:
(1) utilize the device described in claim 1～7 any one, make breeding wastewater flow into static mixer through water-in, at ozone inlet mouth, place adds ozone, and intake pressure is controlled to 0.015～0.03Mpa, and charge flow rate is 0.08～0.15m
3/ h, gas-water ratio is 1:40～1:100, the ratio of the dosage of unit time ozone and unit time breeding wastewater treatment capacity is 1.0～3.0g/m
3;
(2) ozone is dissolved in breeding wastewater in static mixer, in ultraviolet radiation zone, through ultra violet lamp, overflows flow into biologic packing material reaction zone from the gap between dividing plate upper end and casing top; Breeding wastewater after biologic packing material filtration treatment enters exhalant region, then flows out through water outlet;
Breeding wastewater residence time in device is 5～10min.
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|---|---|---|---|
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Citations (8)
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| JPH11104697A (en) * | 1997-10-03 | 1999-04-20 | Teijin Ltd | Method and apparatus for treating laundry drainage |
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| JP2000135423A (en) * | 1998-10-29 | 2000-05-16 | Akio Tsubota | Ozonized water production device |
| CN1807274A (en) * | 2006-01-27 | 2006-07-26 | 华南理工大学 | Ozone-ultraviolet light treatment method for sewage of enclosed system and the device |
| CN101200338A (en) * | 2006-12-12 | 2008-06-18 | 上海水产大学 | Method for removing organics and ammonia nitrogen from aquaculture water |
| CN102730906A (en) * | 2012-06-18 | 2012-10-17 | 河海大学 | Combined apparatus for advanced treatment of high concentration organic waste water |
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2013
- 2013-11-13 CN CN201310566886.1A patent/CN103553279B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5766488A (en) * | 1994-05-12 | 1998-06-16 | United States Filter Corporation | Method and apparatus for water treatment |
| CN2288177Y (en) * | 1997-03-20 | 1998-08-19 | 许维德 | Submerged filter |
| JPH11104697A (en) * | 1997-10-03 | 1999-04-20 | Teijin Ltd | Method and apparatus for treating laundry drainage |
| CN2333705Y (en) * | 1997-11-03 | 1999-08-18 | 北京风险工程贸易总公司 | Ozone water treatment facilities |
| JP2000135423A (en) * | 1998-10-29 | 2000-05-16 | Akio Tsubota | Ozonized water production device |
| CN1807274A (en) * | 2006-01-27 | 2006-07-26 | 华南理工大学 | Ozone-ultraviolet light treatment method for sewage of enclosed system and the device |
| CN101200338A (en) * | 2006-12-12 | 2008-06-18 | 上海水产大学 | Method for removing organics and ammonia nitrogen from aquaculture water |
| CN102730906A (en) * | 2012-06-18 | 2012-10-17 | 河海大学 | Combined apparatus for advanced treatment of high concentration organic waste water |
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