Method for ecologically purifying nitrogen and phosphorus in surface sediment of aquaculture system

A surface sediment and breeding system technology, applied in the field of nitrogen and phosphorus in the surface sediment of the ecological purification breeding system, can solve the problems of difficulty in fully absorbing nitrogen and phosphorus, low efficiency, and secondary pollution of the water environment, so as to prevent secondary pollution , fast growth, easy to harvest

Active Publication Date: 2016-08-31
YANTAI UNIV
View PDF4 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The long-term accumulation and metamorphic deposition of a large amount of waste will have serious adverse effects on the bottom and sedimentary environment of the breeding area
At the same time, the reverse desorption and dissolution of pollutants in the sediment or the resuspension of pollutants in the water body will cause secondary pollution to the water environment.
[0003] Through searching, we found that there are few reports on sediment nitrogen and phosphorus purification methods, and found that a few of them accelerate the release of nutrients such as nitrogen and phosphorus in sediments into the water through the bioturbation of benthic animals, and then use algae to absorb nutrients in the water. In order to achieve the purpose of purifying nitrogen and phosphorus pollution in sediments
However, the disadvantage of this type of treatment method is that the algae used are mainly planktonic algae or large sheet algae, which usually live on the water surface, and the nitrogen and phosphorus released are mostly concentrated in the overlying water on the surface of the sediment, so the used It is difficult for the algae to fully absorb the nitrogen and phosphorus in the sediment-water interface; in addition, due to the disadvantages that the biomass of planktonic algae is difficult to control and utilize, and the growth of sheet algae is limited by the season and the environment, it is very easy to rot, Not suitable for harvesting and difficult to manage, so its actual effect is not ideal, resulting in high cost and low efficiency

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The method of this invention is applied to Shandong Yantai Muping japonicus aquaculture farm, and its breeding pond scale is 50 mu, is the sandstone bottom quality pond, and pond water depth is 140cm-200cm, and the light intensity of overlying water is 5000Lx-6000Lx within 50cm away from sediment, The average light intensity is 5200Lx.

[0025] The benthic diatoms adopted are mainly diamond-shaped algae, and the filamentous algae are mainly clastiphora, which are cultivated and temporarily raised according to the method of the invention to prepare the benthic diatom liquid.

[0026] Benthic diatom culture and temporary culture, f / 2 medium containing sodium silicate 10-30mg / L, the medium can also be replaced by urea, the temperature is controlled at 15°C-23°C during the cultivation process, and the light is controlled at 1000Lx- 4000Lx, the salinity is controlled at 30-35‰, the pH is controlled at 75-8.5, and it can be aerated during cultivation;

[0027] After culturin...

Embodiment 2

[0035] Shandong Haiyang sea cucumber farm, with a scale of 1,000 mu, is a cofferdam with silt bottom, the water depth is about 150cm, the light intensity of the overlying water within 50cm from the sediment is 1500Lx-5000Lx, the average light intensity is 4500Lx, and the water temperature is 5-20°C.

[0036] The benthic diatoms are diamond algae and navicula, and they are cultivated and temporarily raised according to the method of the present invention to prepare the benthic diatom liquid, and the filamentous algae are clastal algae, which are also temporarily raised according to the method of the present invention. The specific cultivation of the algae used in this embodiment and the temporary cultivation are the same as the method adopted in Example 1.

[0037] Beginning in March, it will only be implemented within a range of about 100 mu southeast of the cofferdam. Spray once every 10 days under sunny conditions in the morning, and the amount of Cladoella at the bottom of ...

Embodiment 3

[0042] Shandong Penglai sea cucumber farm, with a scale of 50 mu, is a polyculture pond with silt bottom and shrimp. The water depth of the pond is 180cm-240cm, the water temperature is between 5-20℃, and the light intensity of the overlying water within 50cm away from the sediment is 1500-4500Lx. The light intensity is 4000Lx.

[0043] The benthic diatoms are navicula, which are cultivated and temporarily raised according to the method of the present invention, and the benthic diatom liquid is prepared, and the clastic algae are also temporarily raised according to the method of the present invention. The specific cultivation of the algae used in this embodiment and the temporary cultivation are the same as the method adopted in Example 1.

[0044] It will be implemented in April, and it will be sprayed every 7-10 days under sunny conditions in the morning. Among them, the average 10 2 cell / cm 2 -10 3 cell / cm 2 Biomass The benthic diatom algae liquid mainly composed of n...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
Login to view more

Abstract

The invention provides a method for ecologically purifying nitrogen and phosphorus in surface sediment of an aquaculture system. By using the ecological niche and life characteristics of benthic diatom and filamentous algae and through biomass proportioning and vital activity of the benthic diatom and filamentous algae, the aims of efficiently, economically and environment-friendly purifying nitrogen and phosphorus in the sediment surface layer and overlying water in an aquaculture environment are achieved.

Description

technical field [0001] The invention relates to a method for ecologically purifying nitrogen and phosphorus in surface sediments of an aquaculture system, belonging to the field of aquaculture. Background technique [0002] Earthen ponds, cofferdams, dams and other breeding areas in my country's coastal areas have poor water exchange capacity, long breeding time, and a large amount of waste generated during the breeding process, such as residual bait, excrement and feces, biological debris and other substances. The long-term accumulation and metamorphic deposition of a large amount of waste will have serious adverse effects on the bottom and sedimentary environment of the breeding area. At the same time, the reverse desorption and dissolution of pollutants in sediments or the resuspension of pollutants in water bodies will cause secondary pollution to the water environment. [0003] Through searching, we found that there are few reports on sediment nitrogen and phosphorus p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32C02F11/02A01G33/00A23K50/80A23K10/30
CPCA01G33/00C02F3/322C02F11/02C02F2203/004Y02A40/80
Inventor 邢荣莲马伟伟邵逸文宋洪旭苏蝉宋慧芬
Owner YANTAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap