Method for filtering aquaculture sewage

A filtration method and aquaculture technology, which are applied in the fields of light water/sewage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. The ability to release silver ions for a long time, the effect of broad-spectrum antibacterial effect

Inactive Publication Date: 2019-06-07
浦江县酉泽水产科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There have been many studies on the mechanism and influencing factors of ultrasound in water treatment, but conventional ultrasonic treatment is often limited or the cost is extremely high

Method used

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  • Method for filtering aquaculture sewage
  • Method for filtering aquaculture sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Preparation of microporous membranes according to the invention:

[0063] materials needed:

[0064] (1) Porous substrate: a pre-washed clean microporous polyethersulfone substrate; the porosity of the substrate is 50.1%, and the average pore diameter is 0.1 micron;

[0065] (2) Sensitization solution: 10 grams of SnCl 2 2H 2 O was mixed with 40 mL of 37% hydrochloric acid and the final volume of the mixture was brought to 1 L with deionized water;

[0066] (3) Activation solution: Mix 10 grams of silver nitrate with 10 mL of ammonium hydroxide and make up to 1 liter of final volume with deionized water;

[0067] (4) TiO 2 Powder: Nitrogen-doped TiO 2 Powder, the doping amount of nitrogen is 2.08at%.

[0068] Preparation:

[0069] (i) Immerse the pre-cleaned microporous polyethersulfone substrate in the sensitizing solution maintained at 25°C and 1 atmosphere for 20 minutes; remove the substrate from the sensitizing solution and rinse it in deionized water for 5 ...

Embodiment 2

[0073] Preparation of microporous membranes according to the invention:

[0074] materials needed:

[0075] (1) Porous matrix: a pre-washed clean microporous polysulfone matrix (Para MF membrane); the porosity of the matrix is ​​56.2%, and the average pore size is 0.26 microns;

[0076] (2) Sensitization solution: 10 grams of SnCl 2 2H 2 O was mixed with 40 mL of 38% hydrochloric acid and the final volume of the mixture was brought to 1 L with deionized water;

[0077] (3) Activation solution: Mix 10 grams of silver nitrate with 10 mL of ammonium hydroxide and make up to 1 liter of final volume with deionized water;

[0078] (4) TiO 2 Powder: co-doped TiO with phosphorus, nitrogen and molybdenum 2 Powder, the doping amount of phosphorus is 1.6 at%, the doping amount of nitrogen is 6.8 at%, and the doping amount of molybdenum is 3.2 at%.

[0079] Preparation:

[0080] (i) Immerse the pre-cleaned microporous polysulfone substrate in a sensitizing solution maintained at 25...

Embodiment 3

[0092]Utilize the microporous membrane to filter aquaculture sewage, the water purification effect is shown in Table 1; as can be seen from Table 1, the microporous membrane of the present invention can be effectively used in the filtration of aquaculture sewage, and after filtration, organic matter, bacteria, viruses, etc. in the sewage can be removed relatively complete; the introduction of ultrasonic waves in the filtration process can strengthen the degradation of organic matter by titanium dioxide; and the use of a mixed solution of resveratrol and isoamyl acetate to pretreat the microporous membrane is beneficial to affect the relationship between organic matter in sewage, and also Shows enhanced organic removal.

[0093] Table 1 water purification effect

[0094]

[0095] The conventional technologies in the above embodiments are known to those skilled in the art, so they will not be described in detail here.

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Abstract

The invention provides a method for filtering aquaculture sewage, and belongs to the field of sewage filtration. The method comprises the steps: performing filtration by using a microporous membrane,introducing ultrasonic waves into the filtered water body simultaneously, performing irradiation with an artificial light source, and controlling the flow rate of water which flows through the microporous membrane at 10-1000 ml / min, wherein the microporous membrane comprises a polymer matrix, a metallic silver-containing coating attached to the surface of the substrate and a silver-covering titanium dioxide photocatalytic coating, and the titanium dioxide photocatalytic coating is prepared by using a powder heating cold spray technique. According to the method, a photocatalysis technology is combined with an ultrasonic technology, so that the filtering effect of the microporous membrane is reinforced, complete removal of organic matter, bacteria, viruses and other substances in the aquaculture sewage can be achieved, and the removal efficiency is high.

Description

technical field [0001] The invention belongs to the field of sewage filtration, and in particular relates to a method for filtering aquaculture sewage. Background technique [0002] With the improvement of seawater aquaculture technology and the expansion of market demand, my country's seawater factory aquaculture has developed rapidly in recent years. However, during the breeding process, on the one hand, because the bait put in cannot be fully utilized by the cultured animals, the excess bait is decomposed in the water, coupled with the metabolism of the cultured animals, resulting in the continuous accumulation of nitrogen and phosphorus in the water body; on the other hand, in order to prevent diseases And water disinfection, often use a variety of chemical agents, so that drug residues continue to accumulate, resulting in deterioration of water quality. Water pollution restricts the development of aquaculture industry. [0003] TiO 2 Photocatalysis is a green and pra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/44C02F1/50C02F1/30C02F1/36C02F1/72B01D67/00B01D69/02C02F103/20C02F101/30
Inventor 孙弋博
Owner 浦江县酉泽水产科技有限公司
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