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Method of purification cultivation of oyster in vivo heavy metal using kelp

A technology for heavy metals and oysters, applied in the application, fish farming, climate change adaptation and other directions, can solve problems such as unreported, and achieve the effects of low price, easy operation and simple method

Inactive Publication Date: 2017-09-22
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Macroalgae such as Asparagus, Gracilaria, and Ulva have been confirmed by many studies to have the ability to reduce heavy metal ions in water, but their application in the purification of heavy metals in shellfish, especially in oysters, has not been reported.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: Cu for cultured Portuguese oysters 2+ take off

[0024] Time: November 2016, Location: Shantou University and Shantou Environmental Quality Inspection Bureau.

[0025] 100kg of 9-month-old Portuguese oysters were washed with sand-filtered seawater and placed in a 10 m 3 Put 10kg of fresh Gracilaria polyculture in the cement pool with sand filtered seawater for 7-14 days, throw in subcordiform algae every day, change the water once every 2 days, continuously inflate, and regularly take samples for testing. The operation steps are as follows: :

[0026] (1) Cleaning oysters: Use sand filter seawater to clean the dirt on the surface of oyster shells.

[0027] (2) Polyculture of macroalgae and oysters: 10m 3 The injection volume of sand-filtered seawater is 20 m 3 Then put 10kg of fresh Gracilaria and 100kg of oysters treated in step (1) into the pond for 7-14 days, and feed them with 3000 / L of P. The oysters were 3 times, the water was changed once every 2...

Embodiment 2

[0031] Example 2: Cd of cultured Portuguese oyster + take off

[0032] Time: January 2017, Location: Shantou University and Shantou Environmental Quality Inspection Bureau.

[0033] After washing 200kg of 12-month-old Portuguese oysters with sand-filtered seawater, they were placed in a 10-m 3 Put 50kg of fresh asparagus in the cement pool with sand filtered seawater for 7-14 days, throw in subcardioid algae every day, change the water once every 2 days, continuously inflate, and regularly take samples for testing, the operation steps for:

[0034] (1) Cleaning oysters: Use sand filter seawater to clean the dirt on the surface of oyster shells.

[0035] (2) Polyculture of macroalgae and oysters: 10m 3 The injection volume of sand-filtered seawater is 20 m 3 Then put 50kg of fresh asparagus and 200kg of oysters treated in step (1) into the pond for 7-14 days, and use 8000 / L of P. Feed the oysters 3 times, change the water once every 2 days, and inflate continuously.

[0...

Embodiment 3

[0039] Example 3: Pb in cultured Portuguese oysters 2+ take off

[0040] Time: March 2017, Location: Shantou University and Shantou Environmental Quality Inspection Bureau.

[0041] 150 kg of 14-month-old Portuguese oysters were washed with sand-filtered seawater and placed in a 10-m 3Put 25kg of fresh asparagus and 25kg of fresh Ulva in the cement pool with sand filtered sea water for 7-14 days, throw in subcardioid algae every day, change the water once every 2 days, continuously inflate, and regularly Sampling and testing, the operation steps are:

[0042] (1) Cleaning oysters: Use sand filter seawater to clean the dirt on the surface of oyster shells.

[0043] (2) Polyculture of macroalgae and oysters: 10m 3 The injection volume of sand-filtered seawater is 20 m 3 Then put 25kg of fresh asparagus, 25kg of fresh Ulva and 150kg of oysters treated in step (1) into the pond for 7-14 days, and use 5000 oysters / L per day. Subcardioid algae were fed oysters 3 times, water w...

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Abstract

The invention relates to a method of purification cultivation of oyster in vivo heavy metal using kelp. The method comprises the steps that fresh asparagus, Gracilaria, Ulva lactuca, and other kelps are utilized and cultivated in a mixed mode with oysters for 7-14 days, the ratio of kelp and sea water is 1-5 kilograms: 1 cubic meter, the ratio of oysters and sea water is 10-20 kilograms: 1 cubic meter, after the processes of feeding a proper amount of platymonas subcordiformis, regularly replacing sea water, continuously inflating and the like, the heavy metal ions in the bodies of oysters can be significantly purified, after the purification, the heavy metal content is significantly lower than the safety level of GB 18421-2001 of the third category of the national standard, the purification efficiencies of Cu2+, Cd2+ and Pb2+ are respectively 32.82%-55.39%, 10.23%-15.91% and 60.42%-66.78%. The method of purification cultivation of oyster in vivo heavy metal using kelp is simple in method, easy to operate, short in cycle, low in cost, high in practicality, environmentally friendly and safe, provides a new method for purification of the heavy metal ions in oysters, and provides new ideas for the purification of heavy metal ions in seafood shellfish products.

Description

【Technical field】 [0001] The invention relates to a method for purifying heavy metals in cultured oysters. Specifically, it relates to a method for purifying heavy metals in cultured oysters by using macroalgae. 【Background technique】 [0002] my country is a big country in oyster farming. In 2015, the output reached 4.57337 million tons, accounting for 33.67% of the total output of cultured shellfish (China Fishery Statistical Yearbook, 2016). Oyster products play an important role in shellfish. However, in recent years, research and research by many scholars have shown that heavy metal pollution of farmed oysters in my country is becoming more and more serious, and the problem of oyster food safety is becoming more and more prominent. Heavy metal pollution makes oyster products not only unable to export, but also domestic sales have repeatedly suffered setbacks, seriously affecting the development of the oyster industry. Therefore, how to purify heavy metals in oysters...

Claims

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Application Information

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IPC IPC(8): A01K61/54A23K10/30A23K50/80
CPCA23K10/30A23K50/80A01K61/54Y02A40/81
Inventor 郑怀平叶挺赵明明马庆涛薛云鹏林清
Owner SHANTOU UNIV
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