Preparing and using method for immobilized photosynthetic bacteria for treating aquaculture waste water

A technology of photosynthetic bacteria and aquaculture, applied in the field of environmental purification, can solve the problems of slow biological treatment, large fluctuations in treatment effect, secondary pollution, etc., and achieve good treatment effect, low cost and fast removal speed

Inactive Publication Date: 2015-09-30
SHANGHAI NAT ENG RES CENT FORNANOTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical and chemical treatment method consumes a lot of energy and easily causes secondary pollution, while the biological treatment method takes effect slowly and the treatment effect fluctuates greatly

Method used

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  • Preparing and using method for immobilized photosynthetic bacteria for treating aquaculture waste water

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Experimental program
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Effect test

Embodiment 1

[0017] Sampling was carried out at the outlet of a fish farm in Zhejiang Province, and the ammonia nitrogen concentration was 12 mg / L, and the COD Mn 56 mg / L, the immobilized photosynthetic bacteria treat the wastewater, including the following steps:

[0018] Pretreatment: Take 100 L of this breeding wastewater and filter it with quartz sand layer for pretreatment to remove most of the suspended solids and some organic pollutants.

[0019] Photosynthetic bacteria immobilization process: Mix sodium alginate, photosynthetic bacteria concentrate, and water in a ratio of 1.5:2:1 and add dropwise to 3% calcium chloride solution. After curing for 10 minutes, put the polymerized gel chlorine Take it out of the calcium chloride solution, wash it with deionized water, add it into the immobilized microbial reactor according to the filling rate of 20%, keep the light for 12 hours a day, and the hydraulic retention time is 48 hours.

[0020] Detection and reuse: Detect the effluent, the...

Embodiment 2

[0024] Sampling was carried out at the outfall of a shrimp and crab farm in Shanghai, and the concentration of ammonia nitrogen was 25 mg / L, and the concentration of COD Cr 88 mg / L, the immobilized photosynthetic bacteria treat the wastewater, including the following steps:

[0025] Pretreatment: Take 100 L of ammonia nitrogen wastewater and filter it with quartz sand layer to remove most of the suspended solids and some organic pollutants. According to the ratio of 2:3:1, mix sodium alginate, photosynthetic bacteria concentrate, and water and add dropwise to 3% calcium chloride solution. After curing for 15 minutes, take out the polymerized gel calcium chloride solution. Wash with deionized water, add to the immobilized microbial reactor according to the filling rate of 15%, keep the light for 8 hours per day, and the hydraulic retention time is 36 hours.

[0026] Detection and reuse: Detect the effluent, the concentration of ammonia nitrogen is 1.2 mg / L, COD Cr The concent...

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Abstract

The invention discloses a preparing and using method for immobilized photosynthetic bacteria for treating aquaculture waste water. The immobilized photosynthetic bacteria are formed by natural polymer sodium alga acid hydrogel of a grid structure, and active photosynthetic bacteria fixed in grids. The invention further discloses the using method for the immobilized photosynthetic bacteria for treating the aquaculture waste water. According to the preparing and using method for the immobilized photosynthetic bacteria for treating the aquaculture waste water, the COD removing rate can reach 90%, the ammonium-nitrogen removal rate can reach 95%, and the operation of using photosynthetic bacterium particles for treating the aquaculture waste water is easy and convenient to implement, and the pollutant removing rate is high.

Description

technical field [0001] The invention relates to a photosynthetic bacterium in the field of environmental purification and a preparation method thereof, in particular to an immobilized photosynthetic bacterium and a method for removing COD from aquaculture wastewater. Background technique [0002] my country is a big breeding country. In recent years, the breeding industry has made great progress. The water body of high-density aquaculture contains a large amount of fish feces and residual bait, as well as fish drug residues. The harmful substances produced by them after corruption directly pollute the water body and sediment. Slight pollution can cause discomfort in fish life, increased feed factor, slow growth, and decreased immunity. When accumulated to a certain extent, fish can be poisoned, diseased or even killed. [0003] Aquaculture wastewater treatment methods mainly include physical treatment, chemical treatment, physical and chemical treatment, and biological trea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C12N11/10C12N11/04
Inventor 何丹农董亚梅尹桂林严鹏童琴金彩虹
Owner SHANGHAI NAT ENG RES CENT FORNANOTECH
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