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Breeding method for lowering bacterial quantity and heavy metal content in bodies of bivalve molluscs

A breeding method and technology of bivalve mollusks, applied in chemical instruments and methods, fish farming, special treatment targets, etc., can solve the problems of reducing the number of bacteria in oysters, and achieve the effect of meat quality

Inactive Publication Date: 2018-10-19
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the above purification methods can effectively remove heavy metals in oysters, they fail to reduce the number of bacteria in oysters.

Method used

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  • Breeding method for lowering bacterial quantity and heavy metal content in bodies of bivalve molluscs
  • Breeding method for lowering bacterial quantity and heavy metal content in bodies of bivalve molluscs
  • Breeding method for lowering bacterial quantity and heavy metal content in bodies of bivalve molluscs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] For specifications 2×25m 2 After the indoor cement pool is disinfected, the seawater that has passed through the sand filter and the net filter in turn is added to 1.8m, and the seawater is disinfected with 1350g of 50% strong chlorine essence for 12h, and then neutralized with 675g of sodium thiosulfate, continuously Aerate for 12 hours, and wait for the residual chlorine in the water to disappear completely to obtain dechlorinated seawater. Introduce dechlorinated seawater to 0.5m through screen filtration 3 In the PVC barrels, the introduction of seawater in each barrel is 0.3m 3 , hang 2 net cages in each bucket, and fill 20 polluted oysters in each net cage. The five treatment groups are A, B, C, D, and E; the PVC barrels of groups A, B, and C were introduced with dechlorinated seawater, and the PVC barrels of groups D and E were introduced with non-chlorinated seawater; group A replaced non-chlorinated seawater every day For seawater, group B was replaced with ...

Embodiment 2

[0052] The specification is 1.5×25m 2 After the indoor cement pool is disinfected, add the seawater that has passed through the sand filter and net filter to 0.8m, and disinfect the water body with 600g of strong chlorine essence with 50% available chlorine for 12 hours, and then neutralize it with 300g of sodium thiosulfate, and continuously expose Gas for 12 hours, until all residual chlorine in the water disappears, and dechlorinated seawater is obtained. The dechlorinated seawater is introduced into 15 0.5m 3 In the PVC barrels, the amount of disinfected seawater introduced in each barrel is 0.3m 3 , hang 2 net cages in each bucket, fill 20 polluted oysters in each net cage, change the breeding water body every day. The salinity of the 5 treatment groups were 10‰, 15‰, 20‰, 25‰ and 30‰, respectively, and the salinity of 20‰ was used as the control group, and each treatment set up 3 parallels. It was carried out under natural light and room temperature, the pH of seawate...

Embodiment 3

[0061] For specifications 1.8×25m 2 After the indoor cement pool is disinfected, add the seawater that has passed through the sand filter and screen filter to 1.5m, and disinfect the water body with 1125g of 50% strong chlorine essence for 12 hours, and then neutralize it with 562.5g of sodium thiosulfate. Aerate for 12 hours, and wait for the residual chlorine in the water to disappear completely to obtain dechlorinated seawater. The dechlorinated seawater is introduced into 18 0.6m 3 In the PVC barrels, the amount of dechlorinated seawater introduced in each barrel is 0.4m 3 , hang 2 net cages in each bucket, fill 20 polluted oysters in each net cage, change the breeding water body every day. The diets of the 5 treatment groups were Spirulina, Oocyst, Chlorella, Chlorella + Oocyst, Spirulina + Oocyst, the control group was not fed any bait, and three parallels were set up for each treatment. It was carried out under natural light and room temperature, the pH of seawater w...

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Abstract

The invention provides a breeding method for lowering the bacterial quantity and heavy metal content in bodies of bivalve molluscs, and belongs to the technical field of purification of bivalve molluscs. The breeding method comprises the following steps that chlorinated disinfectant and seawater are mixed and disinfected for 10-14 hours to obtain disinfected seawater, wherein the effective chlorine content of the chlorinated disinfectant is 40-60 wt%, and the ratio of the mass of the chlorinated disinfectant to the volume of the seawater is (600-1350)g:(20-45)m<3>; the obtained disinfected seawater is mixed with sodium thiosulfate, and the obtained mixed solution is subjected to continuous aeration for 10-14 hours to obtain de-chlorine seawater, wherein the mass ratio of the sodium thiosulfate to the chlorinated disinfectant is 1:(1-3); the bivalve molluscs are bred in the de-chlorine seawater for 10-35 days and are fed with microalgae biological bait in the breeding period. By the adoption of the breeding method for lowering the bacterial quantity and heavy metal content in the bodies of the bivalve molluscs, the bacterial quantity and the heavy metal content in the bodies of thebivalve molluscs can be lowered, both the total number of bacteria and the number of coli groups reach the food hygiene standard, and obtained oyster products have fresh meat, do not have fishy smellor mucus, and are milky white.

Description

technical field [0001] The invention relates to the technical field of purification of bivalve molluscs, in particular to a breeding method for reducing the number of bacteria and the content of heavy metals in the bivalve molluscs. Background technique [0002] In recent years, the pollution of the marine environment is high, the eutrophication of the water body is serious, and the red tides occur frequently. These environmental factors lead to the reduction of the quality of bivalve mollusc products. Bivalve molluscs mainly feed on algae and organic debris in water bodies through filter feeding. Some algae in natural seas contain algae toxins, such as red tide algae such as dinoflagellates and Phaeocystis, and these algae are also enriched with heavy metals. After bivalve molluscs eat algae, heavy metals and algae toxins are accumulated in their bodies; eutrophication The organic matter content in the sea area is high, and a large amount of dissolved organic matter can ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/54A23K50/80A23K10/30C02F1/76C02F103/08
CPCA23K10/30A23K50/80A01K61/54C02F1/76C02F2103/08C02F2303/04Y02A40/81
Inventor 黄翔鹄丁丹勇李长玲
Owner GUANGDONG OCEAN UNIVERSITY
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