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Culturing method of biological flocculation for aquiculture

A biofloc and aquaculture technology, applied in chemical instruments and methods, biological water/sewage treatment, application, etc., can solve problems such as immature technology, and achieve the effect of being suitable for popularization and application, simple method, and increased mixing intensity

Active Publication Date: 2012-06-27
PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the concept of industrial production of biofloc technology (BFT) was proposed in the early 1980s, the technology is still immature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A method for cultivating biological flocs for aquaculture, comprising the following steps:

[0036] 1) Extract the aquaculture water (total suspended solids (TSS) ≥ 50mg / L) of grass carp fish ponds in the later stage of aquaculture into PVC buckets with specifications of 5×2×1;

[0037] 2) Measure the total nitrogen concentration in the water body to be 1.5 mg / L, add syrup, adjust the total carbon content in the water body to 15 mg / L, the total nitrogen content to 1.5 mg / L, and the carbon-to-nitrogen ratio to 10:1;

[0038] 3) Grass carp with a body length of 8-25cm and a weight of 10-120g are stocked in the culture unit, and the stocking density is 10 kg / m 3 ;

[0039] 4) When the total suspended solids (TSS) of the water in the culture unit reaches 100mg / L, the floc water is pumped into the floc collector Imhoff cones, and after 30 minutes of deposition, a stable biofloc is obtained.

[0040] During the cultivation of biofloc, the temperature of the water body is ma...

Embodiment 2

[0045] A method for cultivating biological flocs for aquaculture, comprising the following steps:

[0046] 1) Extract the aquaculture water (total suspended solids (TSS) ≥ 50mg / L) of grass carp fish ponds in the later stage of aquaculture into cement ponds with specifications of 6×2×1;

[0047] 2) Measure the total nitrogen concentration in the water body to 2.0mg / L, add syrup and urea, adjust the total carbon content in the water body to 45 mg / L, the total nitrogen content to 2.25 mg / L, and the carbon-nitrogen ratio to 20:1 ;

[0048] 4) Grass carp with a body length of 8-25cm and a weight of 10-120g are stocked in the culture unit, and the stocking density is 20 kg / m 3 ;

[0049]5) Cultivate for several days. When the total suspended solids (TSS) in the culture unit reaches 500mg / L, the floc water is pumped into the floc collector Imhoff cones, and after 30 minutes of deposition, a stable biofloc is obtained. .

[0050] During the cultivation of biofloc, the temperature ...

Embodiment 3

[0055] A method for cultivating biological flocs for aquaculture, comprising the following steps:

[0056] 1) Extract the aquaculture water (total suspended solids (TSS) ≥ 150mg / L) of grass carp fish ponds in the later stage of aquaculture into cement ponds with specifications of 6×2×1;

[0057] 2) Measure the total nitrogen concentration in the water body to 2.0mg / L, add syrup, adjust the total carbon content in the water body to 30 mg / L, the total nitrogen content to 2.0 mg / L, and the carbon-to-nitrogen ratio to 15:1;

[0058] 3) Grass carp with a body length of 8-25cm and a weight of 10-120g are stocked in the culture unit, and the stocking density is 30 kg / m 3 ;

[0059] 4) When the total suspended solids (TSS) of the water in the culture unit reaches 400mg / L, the floc water is pumped into the floc collector Imhoff cones, and after 10-30 minutes of deposition, a stable biofloc is obtained.

[0060] During the cultivation of biofloc, the temperature of the water body is m...

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Abstract

The invention discloses a culturing method of a biological flocculation for aquiculture, comprising the following steps of: (1) extracting culturing water to a culturing unit; (2) additionally providing a carbon source or / and a nitrogen source for the culturing unit so that the total carbon content in water is 5.5-45mg / L, the total nitrogen content is 0.55-2.25mg / L and the ratio of carbon to nitrogen is (10-20):1; (3) placing cultured fishes into the culturing unit, wherein the released density is 5-30kg / m<3>; and (4) collecting flocculation when the total suspended solid (TSS) content of the water in the culturing unit is up to 100-500mg / L. The biological flocculation cultured by using the method provided by the invention is reasonable in nutritional composition, can be used as bait of aquatic animals and is simple in method, low in cost and suitable for popularization and use.

Description

technical field [0001] The invention relates to a method for cultivating biological flocs, in particular to a method for cultivating biological flocs for aquaculture. Background technique [0002] Biofloc technology is based on the activated sludge method (AST, activated suspension technique) of urban sewage, which is the assimilation process of inorganic nitrogen by microorganisms, and converts ammonia nitrogen into bacterial substances. It is a relatively mature application of activated sludge method in the treatment of urban wastewater. One of the techniques. Compared with traditional sewage treatment technology, biofloc technology has unique effects such as high efficiency, ecological safety, easy degradation and no secondary pollution in water treatment, and has been widely used in both water supply and wastewater treatment. Research and application have attracted the attention of researchers in many fields such as environmental engineering, chemical engineering, and m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00A23K1/18A23K1/10
Inventor 谢骏王海英余德光王广军龚望宝郁二蒙李志斐
Owner PEARL RIVER FISHERY RES INST CHINESE ACAD OF FISHERY SCI
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