A method to promote the establishment of aquaculture biofloc process
A technology of biological flocculation and aquaculture, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as time extension, avoid addition and waste, improve inoculation efficiency, The effect of convenient storage and transportation
Active Publication Date: 2020-08-21
SHANGHAI OCEAN UNIV
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Problems solved by technology
As the salinity increases, the time required increases
Method used
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Experimental program
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Embodiment Construction
[0012] A method for promoting the establishment of aquaculture bioflocculation process, the specific implementation is as follows:
[0013] (1) Cultivation of microbial flocs
[0014] Grind the pelleted feed of shrimp or fish with a crude protein content of 30%-40% into powder, add it to a conical water tank with sufficient aeration and stirring, the concentration of suspended solids is 5000 mg / L, and the salinity is 0-30, Temperature is 25-28°C, pH is controlled at 8.0-8.5, DO is controlled at 6 mg / L, and alkalinity is controlled at 100 – 150 CaCO 3 mg / L;
[0015] Calculate the nitrogen in the added feed, and calculate the amount of molasses required according to C:N=16; add molasses on the first day of adding crushed feed; from the second day on, add the calculated amount of molasses every day 10%; after all additions, if the ammonia nitrogen in the water body is measured to be above 2 mg / L, add 20 mg of carbon according to the nitrogen content of 1 mg / L ammonia nitrogen,...
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Abstract
The invention discloses a method for promoting construction of an aquaculture bioflocculation process. The method comprises the following steps: fixing a cultured microbial flocculation body with polyethylene glycol (PEG), sodium alga acid (SA) and molasses, and generating pellets with the diameter of about 2 to 4 mm in a calcium chloride solution. During use, the prepared immobilized pellets are put into a gauze bag, and the gauze bag is suspended in a microbial flocculation aquaculture pool; no adding of an organic carbon source is needed; a bioflocculation system can be quickly constructed, and the organic carbon source can be continuously supplied. The method has the advantages that the molasses is used as a cheap and efficient aquaculture bioflocculation carbon source, so that an immobilization mode avoids adding for multiple times and waste; the PEG and the sodium alga acid in condensates can be also used as a slow release carbon source in the bioflocculation process. Furthermore, an immobilized microorganism technology can substantially improve the microorganism concentration and the activity; a cured biological flocculation body is stored in an immobilization mode; therefore, storage and transportation are facilitated, and the inoculation efficiency can be also improved.
Description
technical field [0001] The invention relates to a method for promoting the rapid establishment of aquaculture biological flocculation process by inoculating immobilized mature flocs and increasing the carbon: nitrogen ratio of aquaculture water. Background technique [0002] According to the characteristics of bacterial growth and metabolism requirements, the researchers proposed that when the C:N in the growth environment is above 15.75, heterotrophic bacteria will use ammonia nitrogen, nitrite, and nitrate to grow, and form under the conditions of sufficient agitation and sufficient dissolved oxygen supply. Microbial floc (Biofloc). The formed flocs can be directly ingested by filter-feeding cultured animals such as tilapia and Litopenaeus vannamei. [0003] The application of bioflocculation technology in aquaculture has been proved to have the following advantages: ① Realize zero exchange of aquaculture water at a lower cost, and no need to change water during the aquac...
Claims
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IPC IPC(8): C02F3/34
CPCC02F3/341
Inventor 罗国芝陈晓庆安玉谭洪新
Owner SHANGHAI OCEAN UNIV