CN103553279B - 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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- CN103553279B CN103553279B CN201310566886.1A CN201310566886A CN103553279B CN 103553279 B CN103553279 B CN 103553279B CN 201310566886 A CN201310566886 A CN 201310566886A CN 103553279 B CN103553279 B CN 103553279B
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- packing material
- water
- ozone
- biologic packing
- static mixer
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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 aquaculture and the cultivation sterilization of recirculated water and organics removal treatment process and device.
Background technology
Circulating water cultivation is the development trend of following aquaculture, but because of the high-density high capacity of its cultivation and the high cyclic utilization rate of water, makes to strengthen the difficulty of water surrounding regulation and control; And due to the recycling of water, if aquaculture water brings cause of disease into, then aquaculture organism then 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 virus, bacterium and protozoon in aquaculture water fast and effectively, but also the organism of oxidable difficult for biological degradation and nitrate, contribute to recycle system solid particulate to remove, be conducive to the stability strengthening recycle system operation.But the process required dosage that ozone carries out different removal target is not identical, sterilization and disinfection process controls (rapid reaction) by mass transfer velocity, and degradation of organic substances and ammonia nitrogen etc. control (slow reaction) by chemical reaction velocity.Abroad the main oxygen cone that adopts dissolves at present, and dissolved efficiency is high, has and necessarily stops duration of contact, but it belongs to pressure dissolving, and energy consumption is higher; Domestic main employing ejector dissolves, and device is easier, 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 the influence factor that ozone controls by chemical reaction velocity at degradation of organic substances and ammonia nitrogen etc.
Summary of the invention
The present invention aims to provide a kind of for the water treatment device of circulating water culture system and the water technology of circulating water culture system, to solve in existing water treatment device, in ozone application, energy consumption is high, treatment capacity is little, comparatively long residence time is needed, the problems such as plant area is large in degradation of organic substances.
Technical scheme is as follows:
For a water treatment device for circulating water culture system, structure comprises closed casing, and box house is ultraviolet radiation zone and two, biologic packing material reaction zone 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 ultraviolet radiation zone the side deviating from dividing plate, top is water-in and ozone inlet, 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 10% ~ 20% of box height;
Described static mixer is SV type static mixer, and preferably, its structure is, static mixer inside is made up of multiple mixed cell, and each mixed cell forms by the waved plate of V-structure is alternately stacked, and the ripple vergence direction of adjacent two pieces of waved plates is contrary; Wavy channel between adjacent mixed cell is 90 degree of 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 adds source of the gas;
The outlet at bottom of static mixer passes into ultraviolet radiation zone;
Vertically distribute ultraviolet lamp tube in ultraviolet radiation zone, and 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 1.8 ~ 2.1 of radiation radius, 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; Orifice plate distributes aperture, the diameter 6 ~ 10mm of aperture, and the spacing between adjacent apertures 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.
Ozone inlet is provided with check valve, prevents 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, place adds ozone, is controlled by intake pressure at 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 dosage of unit time ozone and the ratio of unit time cultivating wastewater purification amount are 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.
The residence time is 5 ~ 10min to breeding wastewater in a device.
This device is mainly used in water body disinfection and organism ammonia nitrogen removal, and be based on sterilization in static mixer, sterilization and organic matter removal are taken into account in ultraviolet radiation zone, and biologic packing material district is based on organic matter removal.Ozone solution and reaction are integrated by this device, carry out adding of ozone by static mixer to dissolve in, static mixer loss of pressure head little (ejector loss of pressure head is generally about 8 times of static mixer), mixture homogeneity reaches more than 99%, but the ozone gas added needs certain pressure, general control at 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 make full use of air inlet from strip pressure just can satisfy the demand, without the need to other extra means.
By after static mixer combination treatment, the ozone water being mingled with non-dissolved ozone under up by ultraviolet lamp radiation zone.On the one hand under ultraviolet catalytic effect, ozone reacts further and generates the stronger hydroxyl of oxidisability, accelerates the speed of its degradation of organic substances, reduces organic selectivity, improve the scope of handling object, also can accelerate the speed of sterilization; On the other hand, reduce the concentration of ozone in tail gas, improve the security of device.
After the process of ultraviolet radiation zone, enter biologic packing material reaction zone, biologic packing material generally selects 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 the link process of former roads, for high saturated dissolved oxygen state, be conducive to aerobic reaction, reduce at the disinfection efficiency of this link region ozone, active poor microbial film will be removed, highly active microbial film will retain, and keep microorganism on filler to be in highly active increased logarithmic phase, improve the processing efficiency of organism and ammonia nitrogen.
Beneficial effect of the present invention is:
1, this apparatus structure is simple, applies easy, diverse in function, can to carry out disinfection sterilising treatment to aquaculture water, 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 to add, carry out ozone mixed dissolution and possess larger water treatment amount compared to devices such as ejectors, lower power loss, mixed dissolution efficiency significantly improves.This device is 4m in treatment capacity
3when/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, present treatment technique adopts the hydroxyl that ultraviolet lamp radiation catalysis ozone generation oxidisability is stronger, purification of water quality process is carried out by hydroxyl, improve the chemical reaction velocity with organic pollutant, reduce the selectivity to organic pollutant, this device is possessed advantages such as organic matter removal efficiency are high, applied widely, the residence time is short, solves traditional chemical speed of reaction and control reaction needed compared with long residence time, problem that plant area is large.But also improve the required CT value of disinfection efficiency reduction sterilization, under the condition of identical sterilization residence time T, ozone concn C can be reduced, this means to reduce 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 is used for the dissolved oxygen demand meeting biological treatment, can meet the different treatment requirement of water body disinfection and organic matter removal.
3, by the adjustment residence time, meet the processing requirements of different quality, and solve ozone chemical reaction velocity when degrading 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, 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 closed casing, box house is ultraviolet radiation zone and two, biologic packing material reaction zone 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 communicated with by means of only the gap between dividing plate upper end with casing top.
The static mixer 3 of tubulose is configured in ultraviolet radiation zone the side deviating from dividing plate, top is water-in 101 and ozone inlet 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 10% ~ 20% of box height; Recirculated water enters static mixer by water-in, and ozone gas enters static mixer from ozone inlet, in static mixer, be dissolved in recirculated water.
The structure of SV type static mixer as shown in Figure 3 and Figure 4, is made up of multiple mixed cell 301, and each mixed cell is by the alternately stacked cylinder of the waved plate 302 of V-structure, and the ripple vergence direction of adjacent two pieces of waved plates is contrary; Wavy channel 303 between adjacent mixed cell is in 90 degree of 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 adds source of the gas;
The outlet at bottom of static mixer passes into ultraviolet radiation zone;
Vertically distribute ultraviolet lamp tube in ultraviolet radiation zone, and 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, and its spacing is 2 times of radiation radius.
Recirculated water flows into ultraviolet radiation zone and is overflowed by the gap at dividing plate upper end and casing top and flows into biologic packing material reaction zone.
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; Orifice plate distributes aperture, the diameter 8mm of aperture, and the spacing between adjacent apertures 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 having dissolved ozone gas flows into ultraviolet radiation zone from static mixer, and because the stop of dividing plate is from the bottom to top under ultra violet lamp, ozone produces the stronger hydroxyl of oxidisability through radiation catalysis, further sterilization process.
For the device of useful volume 500L, wherein the volumetric ratio of ultraviolet radiation zone and biologic packing material reaction zone is 1:1, and 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, cycling rate is in the circulating water culture system of 1h/ time ~ 3h/ time.
During process, breeding wastewater flows into static mixer through water-in, ozone is added at ozone inlet 2 place entering static mixer, the flow adding ozone is controlled by under meter, and control the pressure of air inlet, general control, at 0.02Mpa, can install check valve at inlet mouth, prevents aqueous reflux phenomenon.The excessive gas of ultraviolet radiation zone discharges from exhaust port 106.Breeding wastewater is after passing through static mixer, and because the stop of dividing plate leads to ultraviolet radiation zone at the flows by action of ultraviolet lamp tube from the bottom to top, ultraviolet lamp radiation radius is 50mm, arranges ultraviolet lamp tube quantity on this basis.During static mixer water outlet, the flow rate of water flow flowing into ultraviolet radiation zone remains on about 0.2m/s.Breeding wastewater enters the biologic packing material reaction zone that biologic packing material is housed after flowing through ultraviolet radiation zone.Breeding wastewater after process flows out exhalant region, and discharge system through water outlet, 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 the need to Additional pressurizations.
Said apparatus is 4m in treatment capacity
3when/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%.
For the cultivating wastewater purification of certain hybrid sturgeon circulating water culture system, after sandfiltration pot filtration treatment, ammonia nitrogen 5.473mg/L in waste water, nitrite 0.094mg/L, COD25mg/L, water colour 106(units PtCo), water temperature 26.5 DEG C, dissolved oxygen 6.95mg/L take flow as 4m
3/ h access to plant, device ozone dosage is 8g/h, and 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%; Compared with before process, 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, ensure 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 (5)
1. the water treatment device for circulating water culture system, it is characterized in that, structure comprises closed casing (1), and casing (1) is inner is ultraviolet radiation zone (2) and (5) two, biologic packing material reaction zone 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 (3) of tubulose is configured in the side that ultraviolet radiation zone deviates from dividing plate, and top is water-in (101) and ozone inlet (102), is fixed on the top of casing; Below is outlet, is 10% ~ 20% of box height with the distance of the bottom of casing;
Described static mixer is SV type static mixer, and inside is made up of multiple mixed cell, and mixed cell forms by the waved plate of V-structure is alternately stacked, and the ripple vergence direction of adjacent two pieces of waved plates is contrary; Wavy channel between adjacent mixed cell is 90 degree of angles;
The external ozone of ozone inlet adds source of the gas;
The outlet at bottom of static mixer passes into ultraviolet radiation zone;
Vertically distribute ultraviolet lamp tube in ultraviolet radiation zone, and 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 1.8 ~ 2.1 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; Orifice plate distributes aperture, the diameter 6 ~ 10mm of aperture, and the spacing between adjacent apertures 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 cavity filling that described biologic packing material layer is 12 ~ 50mm by diameter forms;
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;
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.
2. described in claim 1 for the water treatment device of circulating water culture system, it is characterized in that, ozone inlet is provided with check valve.
3. 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.
4. 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 2 times of radiation radius.
5. the water technology of circulating water culture system, is characterized in that, comprises the steps:
(1) utilize the device described in any one of claim 1 ~ 4, make breeding wastewater flow into static mixer through water-in, at ozone inlet, place adds ozone, is controlled by intake pressure at 0.015 ~ 0.03Mpa, and charge flow rate is 0.08 ~ 0.15m
3/ h, gas-water ratio is 1:40 ~ 1:100, and the dosage of unit time ozone and the ratio of unit time cultivating wastewater purification amount are 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 residence time is 5 ~ 10min to breeding wastewater in a device.
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|---|---|---|---|
| CN201310566886.1A CN103553279B (en) | 2013-11-13 | 2013-11-13 | Water treatment device and method for circulating aquaculture system |
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| CN103553279B true CN103553279B (en) | 2015-07-08 |
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| 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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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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