Raw water after-treatment method in aquatic breeding plant in summer and autumn

A technology for raw water and aquatic products, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of harsh preparation process conditions, poor stability of ferrate, high production cost, etc. , to achieve the effects of improving survival rate and growth rate, ensuring food safety, and reducing production costs

Inactive Publication Date: 2015-07-08
INSPECTION & QUARANTINE TECH CENT OF FUJIAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the key restrictive factors for using ferrate as a high-efficiency agent for water treatment are the harsh preparation process conditions and high production costs of high-purity solid ferrate, which greatly restricts its wide application in industrial fields, while the production of liquid ferrate Although the cost is low, the stability of ferrate in aqueous solution is poor and the storage period is short. These problems have become the main bottleneck restricting the popularization and application o

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] First, use potassium ferrate at a concentration of 3mg / L for 30 minutes to quickly reduce the bacterial density by about 90% and the sulfide concentration by about 98%; Kill the conditional pathogenic bacteria in raw water.

[0018] The seedling room of Dalian Dongshun Aquatic Products Co., Ltd. (located in the coastal waters of Wafangdian, Dalian) that uses this treatment method to treat raw water has achieved excellent results during the indoor seedling and summer cultivation of sea cucumber seedlings in the summer and autumn of 2013 (early June to early October). 2.7kg / m 3 The highest yield in the local area, the average weight of seedlings out of the warehouse has increased from 0.6g / head to 0.9g / head; indoor seedlings have strong adaptability after being put into outdoor ponds, and their survival rate and growth rate are extremely ideal. At the same time, the purchase cost of antibiotics in the indoor seedling and cultivation stages is greatly reduced, and the eco...

Embodiment 2

[0020] First, use sodium ferrate at a concentration of 50 mg / L for 30 minutes; then add potassium hydrogen persulfate compound salt at a concentration of 20 mg / L for 10 minutes to further kill the conditional pathogenic bacteria in the raw water.

[0021] In an abalone farm in Fujian, due to the eutrophication of seawater, the number of Vibrio in the water was as high as 10 6 More than one / ml, after treated with this method, the number of Vibrio dropped to 10 3 Individual / ml, the incidence of abalone sepsis (pathogenic bacteria is Vibrio campestellii) is greatly reduced, turning losses into profits.

Embodiment 3

[0023] First, use strontium ferrate at a concentration of 40 mg / L for 45 minutes; then add potassium persulfate compound salt at a concentration of 50 mg / L for 5 minutes to further kill the conditional pathogenic bacteria in the raw water.

[0024] A sea cucumber nursery in Jinzhou, Dalian, is located in Jinzhou Bay, Bohai Sea. The discharge of domestic sewage is large, and the number of heterotrophic microorganisms in the seawater is large. The effect of seedling cultivation has not been good for many years. After being treated with this method, the survival rate and growth speed of the sea cucumber seedlings return to normal, and the sea cucumber seedlings become a local technological and environmental demonstration enterprise.

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PUM

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Abstract

The invention provides a raw water after-treatment method in an aquatic breeding plant in summer and autumn, aiming at the conditions of high bacteria density, high sulfide content and high ammonia nitrogen content in raw water in the aquatic breeding plant in summer and autumn. With the adoption of ferrate pretreatment and hydrogen persulfate matched treatment, the amount of the hydrogen persulfate is reduced, and the sterilization effect of the ferrate is enhanced. According to the water treated by the method disclosed by the invention, the number of pathogenic bacteria in the water condition is 103 bacteria per ml or below, the sulfide content is in a safe concentration range, and when the water is used for breeding, the seed quality and the survival rate of the aquatic breeding plant can be obviously improved, the dependence on antibiotics in the breeding and cultivating link is alleviated or avoided, and the edible security of cultured products is effectively guaranteed.

Description

technical field [0001] The invention belongs to the field of aquatic seedling cultivation, and in particular relates to a post-treatment method for raw water of aquatic seedling cultivation plants in summer and autumn. Background technique [0002] In recent years, with the rapid development of the nursery industry, for example, the number of sea cucumber nurseries in Wafangdian, Dalian has soared from 200 10 years ago to more than 7,000 at present, and the self-pollution phenomenon it brings is also becoming more and more serious , the quality of offshore seawater is deteriorating at an accelerated rate. [0003] The traditional raw water treatment methods for seedling cultivation are mainly dark sedimentation, pressure sand filtration (or valveless filter), and the elimination of bacteria is completed in the seedling cultivation workshop, mainly using various antibiotics. The consequence that causes is that the seedling survival rate is not high during the indoor cultiva...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 白泉阳马福恒马聪王武军
Owner INSPECTION & QUARANTINE TECH CENT OF FUJIAN ENTRY EXIT INSPECTION & QUARANTINE BUREAU
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