CN104230093A - Method for removing earthy smell in enclosed aquaculture water body - Google Patents
Method for removing earthy smell in enclosed aquaculture water body Download PDFInfo
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- CN104230093A CN104230093A CN201310250829.2A CN201310250829A CN104230093A CN 104230093 A CN104230093 A CN 104230093A CN 201310250829 A CN201310250829 A CN 201310250829A CN 104230093 A CN104230093 A CN 104230093A
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- mib
- gsm
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Abstract
The invention discloses a method for removing earthy smell in an enclosed aquaculture water body, and relates to purification of an aquaculture water body. An enclosed aquaculture system, an ultraviolet lamp radiation device and an anaerobic sequencing batch reactor are adopted. The method is characterized by comprising the following steps: feeding aquaculture water which is discharged from a culture pond into the ultraviolet lamp radiation device; killing microbial sources of 2-MIB and GSM in the aquaculture water; degrading dead microbes and 2-MIB and GSM in water by anaerobes of the anaerobic sequencing batch reactor; and feeding the water from which the -MIB and GSM are removed into a biofilter of the enclosed aquaculture system through a circulating pump by adopting ultraviolet irradiation and microbiological methods.
Description
Technical field
The present invention relates to a kind of purification of aquaculture system, especially the minimizing technology of GSM and 2-MIB in aquaculture system.
Background technology
It has been a ubiquitous worldwide problem, particularly freshwater aquiculture water body that culturing pool water body and fish body exist off-flavour problem.Off-flavour material main component comprises ground depth (Geosmin, GSM) and 2-methyl iso-borneol (2-methylisoborneol, 2-MIB).GSM and 2-MIB be cyanobacterium (
cyanobacteria) and actinomycetes (
actinomyces) etc. the lipotropy secondary metabolite of microorganism, easily accumulate in the fish tissues of lipid rich.Catfish (
catfish), perch (
bass), tilapia (
tilapia), rainbow trout (
rainbowtrout) etc. kind be considered to the more serious kind of off-flavour situation.Although not evidence suggests, the existence of 2-MIB and GSM can directly make fish lethal, has a certain impact to the growth of fish body.Research shows that 503nhibiting concentration is respectively 2-MIB and the GSM suppression sea urchin fertilization membrane formation of 68.77 mg/L and 16.67mg/L, 2-MIB and GSM that 503nhibiting concentration is respectively 66.86mg/L and 16.58mg suppresses sea urchin cell fission.
The threshold value of 2-MIB and GSM is lower.Research shows, the peculiar smell olfact of aquaculture water 2-MIB and GSM is respectively 9 ~ 42ng ∕ L and 4 ~ 10 ng ∕ L.So, if containing bilgy odour in aquaculture system, even very low dosage, also can be entered in fish body by the gill of fish, shrimp and crab, body surface or digestive tube.Therefore, the existence of bilgy odour greatly reduces the quality of fish, has had a strong impact on the famous and precious economic fishery products of the economic benefit of aquaculture, particularly circulating water cultivation, and when exporting, this situation will be more serious.Research shows that culturist is often only because catfish off-flavour problem will lose income 0.04-0.26 dollar/Kg, and the social cost of catfish culture also decreases about 12%.Circulating water cultivation is a kind of water saving, economizes ground, eco-friendly aquaculture pattern, but build and running cost high.In order to ensure economic benefit, the economic worth cultivating object in circulating water culture system is higher, and the impact of existence on productivity effect of bilgy odour is more obvious.Therefore, control and eliminate the famous and precious economic fish that off-flavour in aquaculture water has become the important content in fish production activity, particularly circulating water cultivation.
In the aquaculture system reported, the minimizing technology of bilgy odour has physics, chemistry and biological removal method.Physical is mainly through zeolite, immobilization particle shaped activated carbon (Granular Active Carbon, GAC), the adsorption of the organic and inorganic sorbent material such as powdered active carbon (Powdered Active Carbon, PAC) and beta-cyclodextrin urethane carrys out adsorb peculiar smell material; Or the oxygenant such as GAC, PAC and KMNO4 or O3 combined improve the removal efficiency of smell substance further; Or utilize ultraviolet radiation (Ultraviolet Irradiation, UV) technology to remove GSM and MIB; But these Physicals are removed, and process is complicated, removal cost is high, removal efficiency is low; Gac is easily saturated, and in water body, the existence of organism (3-10mg/L) obviously reduces the loading capacity of gac; Also can be entered in other water body by again discharging by GSM and 2-MIB adsorbed, and unrealized removal really.Chemical method is mainly through utilizing some TiO
2, O
3, H
2o
2reach with the oxygenizement of the oxygenant such as chlorinated product the effect removing bilgy odour, but GSM and MIB exists with the outer dissolution mechanism of born of the same parents, the treatment process traditional to these has certain resistant function; And oxygenant meeting cracking frustule in oxidising process, cause the release of more intracellular metabolite concentrations, thus produce the by product such as nitrite, BrO3-, reduce the removal efficiency of GSM and MIB, and circulating water cultivation pattern does not change water substantially, the accumulation of these by products brings new impact may to cultivation object.Biological process is a kind of minimizing technology of current most prospect, mainly through biofiltration or inoculate the method that the degradation bacteria such as GSM or 2-MIB improves GSM and 2-MIB removal efficiency reach the object removing peculiar smell on biofilter, but cannot control the microorganism industry of 2-MIB and GSM, and clearance is subject to the impact of inorganic nitrogen and particulate matter in aquaculture water, removal effect is all undesirable, also need exploitation a kind of efficient, free of contamination stabilate controls off-flavour substance method, avoid in cultivation object fish body containing 2-MIB and GSM, guarantee aquatic product quality and productivity effect.
Summary of the invention
The invention provides a kind of uviolizing and Anaerobic Sequencing Bath Reactor combined apparatus, as a branch road of closed aquaculture systems water treatment portion, object is for circulating water cultivation pattern provides a kind of control method that is stable, GSM and 2-MIB efficiently.
Technical scheme of the present invention adopts closed aquaculture systems, ultraviolet lamp radiation devices and Anaerobic Sequencing Bath Reactor (Anaerobic Sequencing Batch Reactor, ASBR), described closed aquaculture systems is by culturing pool, solid-liquid separating machine, recycle pump, biofilter, heated for controlling temperature and Liqiud-gas mixing device composition, it is characterized in that the breeding water of discharging bottom culturing pool directly or enter ultraviolet lamp radiation devices by recycle pump, pass through uviolizing, kill the production by biological source of 2-MIB and GSM in aquaculture water, 2-MIB and GSM in dead microorganism corpse and water body degrades through the anaerobion of Anaerobic Sequencing Bath Reactor again, described ultraviolet lamp radiation devices is rectangular parallelepiped, long 1.5m, high 1.2m, wide 1m, centre is evenly distributed with 4 row's ultraviolet lamp tubes, often arrange 4, totally 16 ultraviolet lamp tubes, tube diameter 5cm, the opening time of fluorescent tube is controlled by micro-electroplax, single fluorescent tube is is optionally opened and closed, radiation wavelength 254nm, radiation dose 30000W/(scm
2), pneumatically operated switch controls, and the water body residence time is 3 minutes, described Anaerobic Sequencing Bath Reactor is the cylindrical container that PVC makes, high 2.6m, diameter 1.40m, cumulative volume is 40000L, and effective reacting volume is 39500L, top 500L is as air chamber, cylinder top is added a cover separately, and central spot is agitator openings, and stirring velocity is 150rpm, external timer, if opening for feed and discharge port, the biofilter of water body by recycle pump feeding closed aquaculture systems of 2-MIB and GSM is removed by uviolizing and microbial process.
Outstanding feature of the present invention is 2-MIB and GSM removed by uviolizing and microbial process in aquaculture water, and minimizing technology is safe, stable.In addition, present method has adaptable, high and do not produce by product and accumulate on aquaculture water to the clearance of GSM and 2-MIB in circulating water cultivation water body.Because ASBR reactor is extensible formula device, and be connected with ultraviolet lamp radiation devices and run, so present method tool runs, easy to operate unusual effect.
Accompanying drawing explanation
Fig. 1 is a kind of schematic flow sheet removing bilgy odour in closed aquaculture water body.
Embodiment
(see photo) of the present invention comprises employing closed aquaculture systems, ultraviolet lamp radiation devices 4, Anaerobic Sequencing Bath Reactor 5, described closed aquaculture systems is made up of culturing pool 1, solid-liquid separating machine 2, recycle pump 3, biofilter 6, heated for controlling temperature 7 and gas-liquid mixed 8 device, the method removing bilgy odour in water body is connected with ultraviolet lamp radiation devices by Anaerobic Sequencing Bath Reactor, as a branch road of closed aquaculture systems water treatment portion.Water body in culturing pool is discharged directly or by recycle pump through ultraviolet lamp radiation devices at the bottom of pond, pass through uviolizing, effectively kill the production by biological source of 2-MIB and GSM in the aquaculture water flowing through reactor, in dead microorganism corpse and water body, existing 2-MIB and GSM is again through Anaerobic Sequencing Bath Reactor, is degraded and removed by Anaerobic Sequencing Bath Reactor anaerobion.The operating parameter of ultraviolet lamp radiation devices: radiation wavelength 254nm, radiation dose 30000W/(scm
2), pneumatically operated switch controls.The water body residence time is 3 minutes.Anaerobic Sequencing Bath Reactor is the cylindrical container that PVC makes, high 2.6m, diameter 1.40, cumulative volume is 40000L, and effective reacting volume is 39500L, top 500L is as air chamber, cylinder top is added a cover separately, and central spot is agitator openings, and stirring velocity is 150rpm, external timer, if opening for feed and discharge port.The water body being removed 2-MIB and GSM by uviolizing and microbial process enters closed aquaculture systems by recycle pump and biofilter.
Data listed in Table are measured results that present method purifies closed circulation water aquaculture water, show that present method can remove the off-flavour material such as GSM and MIB in closed culture water body effectively.
Claims (1)
1. remove the method for bilgy odour in closed aquaculture water body for one kind, adopt closed aquaculture systems, ultraviolet lamp radiation devices and Anaerobic Sequencing Bath Reactor, described closed aquaculture systems is by culturing pool, solid-liquid separating machine, recycle pump, biofilter, heated for controlling temperature and Liqiud-gas mixing device composition, it is characterized in that the breeding water of discharging bottom culturing pool directly or enter ultraviolet lamp radiation devices by recycle pump, pass through uviolizing, kill the production by biological source of 2-MIB and GSM in aquaculture water, 2-MIB and GSM in dead microorganism corpse and water body degrades through the anaerobion of Anaerobic Sequencing Bath Reactor again, described ultraviolet lamp radiation devices is rectangular parallelepiped, long 1.5m, high 1.2m, wide 1m, centre is evenly distributed with 4 row's ultraviolet lamp tubes, often arrange 4, totally 16 ultraviolet lamp tubes, tube diameter 5cm, the opening time of fluorescent tube is controlled by micro-electroplax, single fluorescent tube is is optionally opened and closed, radiation wavelength 254nm, radiation dose 30000W/(scm
2), pneumatically operated switch controls, and the water body residence time is 3 minutes, described Anaerobic Sequencing Bath Reactor is the cylindrical container that PVC makes, high 2.6m, diameter 1.40m, cumulative volume is 40000L, and effective reacting volume is 39500L, top 500L is as air chamber, cylinder top is added a cover separately, and central spot is agitator openings, and stirring velocity is 150rpm, external timer, if opening for feed and discharge port, the biofilter of water body by recycle pump feeding closed aquaculture systems of 2-MIB and GSM is removed by uviolizing and microbial process.
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| CN201310250829.2A CN104230093B (en) | 2013-06-24 | 2013-06-24 | A kind of method removing bilgy odour in closed aquaculture water body |
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| CN201310250829.2A CN104230093B (en) | 2013-06-24 | 2013-06-24 | A kind of method removing bilgy odour in closed aquaculture water body |
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| CN104230093A true CN104230093A (en) | 2014-12-24 |
| CN104230093B CN104230093B (en) | 2016-01-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036291A (en) * | 2015-08-05 | 2015-11-11 | 同济大学 | Method for degrading smelly substance in water through oxidizing agent activated by ultraviolet light |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6171480B1 (en) * | 1996-06-24 | 2001-01-09 | Board Of Regents, The University Of Texas System | Automated closed recirculating aquaculture filtration system |
| CN101948162A (en) * | 2010-10-14 | 2011-01-19 | 河海大学 | Method for inhibiting excessive propagation of algae in small and medium size landscaping water bodies |
| CN102745820A (en) * | 2012-02-28 | 2012-10-24 | 北京科技大学 | Method for removing MIB and Geosmin in water by using inoculation biofilter |
-
2013
- 2013-06-24 CN CN201310250829.2A patent/CN104230093B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6171480B1 (en) * | 1996-06-24 | 2001-01-09 | Board Of Regents, The University Of Texas System | Automated closed recirculating aquaculture filtration system |
| CN101948162A (en) * | 2010-10-14 | 2011-01-19 | 河海大学 | Method for inhibiting excessive propagation of algae in small and medium size landscaping water bodies |
| CN102745820A (en) * | 2012-02-28 | 2012-10-24 | 北京科技大学 | Method for removing MIB and Geosmin in water by using inoculation biofilter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105036291A (en) * | 2015-08-05 | 2015-11-11 | 同济大学 | Method for degrading smelly substance in water through oxidizing agent activated by ultraviolet light |
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