A method for removing soil odor in closed aquaculture water body
An aquaculture and closed technology, applied in chemical instruments and methods, light water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of low removal efficiency, easy saturation of activated carbon, complicated removal process, etc., to achieve removal Safe method, strong adaptability and high removal rate
Inactive Publication Date: 2016-01-06
SHANGHAI OCEAN UNIV
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Problems solved by technology
[0003] 2-MIB and GSM have lower thresholds
The physical method mainly uses the adsorption of organic and inorganic adsorbents such as zeolite, immobilized granular activated carbon (Granular Active Carbon, GAC), powdered activated carbon (Powdered Active Carbon, PAC) and β-cyclodextrin polyurethane to adsorb odor substances; or GAC, Combining PAC with oxidants such as KMNO4 or O3 to further improve the removal efficiency of odorous substances; or use Ultraviolet Irradiation (UV) technology to remove GSM and MIB; but these physical methods have complex removal processes, high removal costs, and low removal efficiency; Activated carbon is easily saturated, and the presence of organic matter (3-10mg / L) in water significantly reduces the adsorption capacity of activated carbon; the adsorbed GSM and 2-MIB will also be re-released and enter other water bodies without real removal
The chemical method mainly uses some TiO 2 , O 3 、H 2 o 2 However, GSM and MIB exist in the form of extracellular dissolution, which has a certain resistance to these traditional treatment methods; and the oxidant will crack algae cells during the oxidation process , leading to the release of more intracellular metabolites, resulting in by-products such as nitrite, BrO3-, and reducing the removal efficiency of GSM and MIB. However, the recirculating aquaculture model basically does not change water, and the accumulation of these by-products may cause damage to the cultured objects. bring new influence
Biological method is currently the most promising removal method. It mainly achieves the purpose of removing odor by biological filtration or inoculating GSM or 2-MIB and other degrading bacteria on the biological filter to improve the removal efficiency of GSM and 2-MIB. It is impossible to control the microbial industry of 2-MIB and GSM, and the removal rate is affected by the inorganic nitrogen and particulate matter in the aquaculture water, and the removal effect is not ideal. It is also necessary to develop an efficient, pollution-free and stable biological control of soil odor Material method, avoiding the inclusion of 2-MIB and GSM in the target fish, ensuring the quality and production efficiency of aquatic products
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[0009] The present invention (see accompanying drawing) comprises adopting closed aquaculture system, ultraviolet lamp radiation device 4, anaerobic sequencing batch reactor 5, and described closed aquaculture system is composed of culture pond 1, solid-liquid separator 2, circulation pump 3. It is composed of biological filter 6, heating temperature control 7 and gas-liquid mixing 8 devices. The method to remove the smell of soil in the water body is to connect the anaerobic sequencing batch reactor with the ultraviolet lamp radiation device as a closed aquaculture system for water treatment part of a branch. The water in the aquaculture pond is discharged directly from the bottom of the pond or passed through the ultraviolet lamp radiation device through the circulating pump, and the ultraviolet light is irradiated to effectively kill the microbial sources of 2-MIB and GSM in the aquaculture water flowing through the reactor, dead microbial corpses and The existing 2-MIB and...
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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 [0001] The invention relates to the purification of aquaculture water, in particular to the method for removing GSM and 2-MIB in the aquaculture water. Background technique [0002] The problem of earthy odor in the water body and fish body of the aquaculture pond has been a ubiquitous worldwide problem, especially in the freshwater aquaculture water body. The main components of earthy odor substances include geosmin (Geosmin, GSM) and 2-methylisoborneol (2-MIB). GSM and 2-MIB are cyanobacteria ( Cyanobacteria ) and actinomycetes ( Actinomyces ) and other lipophilic secondary metabolites of microorganisms are easy to accumulate in lipid-rich fish tissues. catfish( Catfish ),sea bass( Bass ), tilapia ( Tilapia ), rainbow trout ( Rainbowtrout ) and other varieties are considered to be those with serious earthy odor. Although there is no evidence that the existence of 2-MIB and GSM can kill fish directly, but they have some influence on the growth o...
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IPC IPC(8): C02F9/14A01K63/04C02F3/28C02F1/32
Inventor 罗国芝马念念谭洪新李丽孙大川
Owner SHANGHAI OCEAN UNIV