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Method for recovering waste water from aquatic culture in original place

A technology for aquaculture and in-situ restoration, applied in fish farming, application, climate change adaptation, etc., to achieve strong adsorption capacity, improve water quality, and remarkable restoration effects

Inactive Publication Date: 2005-05-11
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the commonly used biofilm carrier is composed of soft, semi-soft or hard fillers, with a specific surface area of ​​about 50, which requires certain infrastructure projects and necessary technological processes for design.
At the same time, this kind of technology must require professionals to operate
For non-industrial aquaculture, it is not feasible to use biofilm method for ex-situ restoration

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1 Laboratory simulated aquaculture wastewater restoration test

[0035] After fixing the bottom of the biofilm carrier AquaMats with a painted iron pipe, it is calculated as 20 cubic meters of water per square meter of the biofilm carrier serving 20 cubic meters of water and placed in the indoor simulation of the bottom of the heavily polluted aquaculture water body. Put photosynthetic bacteria, bacillus, nitrifying bacteria and denitrifying bacteria into the water at a ratio of 4:3:3:2 and a ratio of 10 -6 ml / l, the number of viable bacteria is 10 10 Pieces / ml or more. The water temperature is 28°C, pH is 7.5, and the oxygen is aerated with an aerator at a distance of 50 cm from the water surface, and the dissolved oxygen is above 6.5mg / l.

[0036] Table 1: Laboratory simulation test water quality change table (mg / l)

[0037] 2004-06 NO 2 -N COD BOD 5 NH 4 -N PO 4 -P TN

[0038] Background value 0.48 96 14.34 11.37 2.01 24.16

[0039] The third day 0.38 44 9.36 ...

Embodiment 2

[0050] Example 2 Remediation test of aquaculture wastewater

[0051] The bottom of the biofilm carrier AquaMats is bagged with fine sand and then stitched up. The biofilm carrier serves 20 cubic meters of water per square meter and puts it into the bottom of the aquaculture water body. Put photosynthetic bacteria, bacillus, nitrifying bacteria and denitrifying bacteria into the water at a ratio of 4:3:3:2 and a ratio of 10 -6 ml / l, the number of viable bacteria is 10 10 Pieces / ml or more. The water temperature is 25℃, the pH is 7.5, and the oxygen aerator is aerated at a distance of 50 cm from the water surface, and the dissolved oxygen is above 5mg / l.

[0052] Table 3: Water quality changes in aquaculture wastewater restoration test (mg / l)

[0053] 2004-09 NO 2 -N COD BOD 5 NH 4 -N PO 4 -P TN

[0054] Background value 0.022 64 23.70 0.70 0.110 2.61

[0055] The third day 0.027 43 20.00 0.54 0.059 1.80

[0056] Seventh day 0.012 28 15.00 0.46 0.098 1.67

[0057] Fourteenth day...

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PUM

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Abstract

A method for in-situ durable restoration of the water used to culture aquatic animals features use of a novel biofilm carrier AquaMats, which has high adsorptivity and can provide a better growth and reproduction environment to the useful microbes for absorbing and using the organic pollutents in water and converting them to inorganic pollutents.

Description

Technical field [0001] The invention relates to the field of environmental protection, in particular to a method for repairing aquaculture wastewater. Background technique [0002] The current aquaculture mode is mostly based on feeding. The eutrophic factors such as residual bait, feces, N and P are discharged into the water body, causing the chemical requirement (COD) and biological oxygen consumption (BOD) of the aquaculture water to seriously exceed the standard, and some Has exceeded the national three-level water quality standards. It is estimated that every ton of shrimp produced can add 0.2 tons of N element and 0.05 tons of P element in the water body, which results in aggravation of fish and shrimp diseases and lower production. Therefore, improving the aquaculture water environment has become a key issue and research hotspot for the sustainable development of aquaculture production. [0003] my country's current total aquatic product output has accounted for 1 / 3 of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 黄凤莲陈桂珠夏北成
Owner SUN YAT SEN UNIV
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