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Aquaculture sewage treatment method

A sewage treatment method and aquaculture technology, applied in the field of aquaculture sewage treatment, can solve the problems of direct discharge of aquaculture sewage and lack of water treatment facilities and equipment, and achieve the effect of improving utilization efficiency, improving effect, and realizing recycling

Inactive Publication Date: 2012-01-25
JIMEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the factory farming system facilities and equipment in my country are still at a relatively low level, and there is a serious shortage of water treatment facilities and equipment, and the breeding sewage is still directly discharged

Method used

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Effect test

Embodiment 1

[0035] The specific treatment process of the aquaculture sewage treatment method of the present invention is: first add photosynthetic bacteria to complete the start-up of microorganisms; then use chitosan (CTS) as a flocculant, and the dosage is 100mg / L sewage (m / v) , The hydraulic retention time of aquaculture sewage in the flocculation tank is 20 minutes, and it is filtered by microfiltration membrane.

[0036] The sewage before and after being treated by the method is analyzed and calculated to obtain the pollutant removal rate. Measured water treatment effect: the removal rate of chemical oxygen demand is 50%~65%, the removal rate of suspended solids is 90%~95%, the removal rate of ammonia nitrogen is 50%~55%, and the removal rate of nitrite nitrogen is 70%~ 80%, and the removal rate of active phosphate is 45% to 55%. The formula for calculating the pollutant removal rate is: , the same below.

Embodiment 2

[0038] The specific treatment process flow of the aquaculture sewage treatment method of the present invention is as follows: first add Bacillus subtilis to complete the start-up of microorganisms. Polyaluminum ferric chloride (PAFC) is used as the flocculant, and the dosage is 30mg / L sewage (m / v). Membrane filtration. Measured water treatment effect: the removal rate of chemical oxygen demand is 60%~70%, the removal rate of suspended solids is 95%~100%, the removal rate of ammonia nitrogen is 55%~65%, and the removal rate of nitrite nitrogen is 75%~ 85%, and the removal rate of active phosphate is 50% to 60%.

Embodiment 3

[0040]The specific treatment process flow of the aquaculture sewage treatment method of the present invention is as follows: first add photosynthetic bacteria and Bacillus subtilis to complete the start-up of microorganisms. Polyaluminum ferric chloride (PAFC) and chitosan (CTS) are used as flocculants, and the concentrations added to the sewage are: PAFC 30mg / L sewage (m / v), CTS 15mg / L sewage (m / v ), the hydraulic retention time of aquaculture sewage in the flocculation tank is 30min, and the ultrafiltration membrane with a cut-off molecular weight of 5000 is used for filtration. Measured water treatment effect: the removal rate of chemical oxygen demand is 65%~75%, the removal rate of suspended solids is 95%~100%, the removal rate of ammonia nitrogen is 60%~70%, and the removal rate of nitrite nitrogen is 80%~ 90%, and the removal rate of active phosphate is 55% to 65%.

[0041] It can be seen from the above examples that the method of the present invention organically comb...

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Abstract

The invention discloses an aquaculture sewage treatment method, which specifically comprises the following steps of: firstly, feeding an microbial agent into sewage discharged from a culture pool, then introducing the sewage into a flocculation basin, and continuously feeding flocculants under the condition of continuous air aeration, wherein the hydraulic retention time is 15-30 minutes; and introducing the sewage subjected to air aeration and flocculation treatment into a membrane device under the action of a constant-flow pump to complete filter treatment, directly discharging permeated clear water or returning the permeated clear water to the culture pool for reutilization, and returning concentrated sewage to the flocculation basin for continuous treatment or directly discharging partial of the concentrated sewage. According to the aquaculture sewage treatment method, a biological treatment technology, a flocculation technology and a modern membrane filtration technology are organically combined, so that water quality is guaranteed, the production efficiency is increased, the production cost is greatly reduced, the advantages of simple process, stable system, small occupancy, low operation cost and the like are achieved, and bacteria and suspended matters in the sewage can be removed, and the purpose of safety recycling is achieved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a treatment method for aquaculture sewage. Background technique [0002] my country's aquaculture production ranks first in the world, and 70% of the world's total aquaculture production comes from my country. The traditional aquaculture method not only competes with humans for water resources, but also a large amount of particulate matter, dissolved metabolic waste, dissolved nutrient salts, antimicrobial agents and drug residues contained in aquaculture sewage from feces and feed are discharged. Eutrophication of aquaculture water and adjacent waters and serious water quality deterioration. Facing the lack of water resources and water environment resources, it is necessary to accelerate the transformation of the growth mode of aquaculture industry, and it is particularly important to seek a sustainable "green" aquaculture model. The recirculating aquaculture model with aquacul...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 陈强黎中宝
Owner JIMEI UNIV
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