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Method for removing nitrogen and phosphorus in breeding wastewater through immobilized algal-bacteria

A technology of aquaculture wastewater and immobilized pellets, which is applied in the field of water purification and can solve the problems that the treatment effect needs to be enhanced.

Active Publication Date: 2018-08-31
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, immobilization methods are also used for the removal of nitrogen and phosphorus in wastewater, most of which involve a single bacterial species or a combination of algae species, and the treatment effect needs to be enhanced

Method used

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  • Method for removing nitrogen and phosphorus in breeding wastewater through immobilized algal-bacteria
  • Method for removing nitrogen and phosphorus in breeding wastewater through immobilized algal-bacteria
  • Method for removing nitrogen and phosphorus in breeding wastewater through immobilized algal-bacteria

Examples

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Effect test

Embodiment 1

[0051] Example 1: Denitrification and phosphorus removal of high ammonia nitrogen aquaculture wastewater by individual fixation of algae and bacteria and mixed fixation

[0052] Centrifuge the chlorella liquid cultivated to the logarithmic phase and the activated sludge taken from the aeration tank of the sewage plant at 4000r / min for 5 minutes, wash with tap water three times and then centrifuge, suspend the culture wastewater to make a concentrated solution, and take appropriate Volume (inoculum size is dry weight 0.4g / L) of chlorella concentrate and activated sludge concentrate are fixed with the method in 2, and the dosage of immobilized pellets is 400 / 100mL, respectively: (1 ) immobilized chlorella (Imm chl); (2) immobilized activated sludge (Imm act); (3) immobilized chlorella and activated sludge (Imm chl+act). Erlenmeyer flasks were placed in a constant temperature light shaker. The culture condition is 25°C, the light is 6000lux, and the light-dark ratio is 16h:8h. ...

Embodiment 2

[0056] Example 2: Nitrogen and phosphorus removal of high ammonia nitrogen aquaculture wastewater by different algae bacteria immobilization methods

[0057] Centrifuge the chlorella liquid cultivated to the logarithmic phase and the activated sludge taken from the aeration tank of the sewage plant at 4000r / min for 5 minutes, wash with tap water three times and then centrifuge, suspend the culture wastewater to make a concentrated solution, and take appropriate Volume (inoculum size is dry weight 0.4g / L) of chlorella concentrate and activated sludge concentrate are fixed with the method in 2, and the dosage of immobilized pellets is 400 / 100mL, respectively: (1 ) free chlorella and immobilized activated sludge (Sus chl+imm act); (2) free activated sludge and immobilized chlorella (Sus act+imm chl); (3) immobilized chlorella and immobilized Activated sludge (Imm chl+imm act); (4) Co-immobilization of algae and bacteria (Co-imm). Erlenmeyer flasks were placed in a constant tempe...

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Abstract

The invention discloses a method for removing nitrogen and phosphorus in breeding wastewater through immobilized algal-bacteria, and belongs to the field of water purification. The method is characterized in that a chlorella and activated sludge symbiotic system is utilized for absorbing and utilizing nitrogen and phosphorus in breeding wastewater, and sodium alginate is capable of immobilizing, and on that basis, the wastewater can be cleaned through chlorella and activated sludge, and meanwhile, algae and water can be separated. The method has the advantages that the breeding wastewater is treated through sodium alginate by immobilizing chlorella and activated sludge, and the gradually-increased pressure of fresh water is relieved; in addition, chlorella and activated sludge are capableof absorbing and utilizing nitrogen and phosphorus in breeding wastewater, so that the wastewater can be purified, and moreover, the possibility that the wastewater is drained into natural water to cause eutrophication can be reduced; in addition, the immobilized chlorella and activated sludge are capable of separating algae and water during treating the wastewater, so that the convenience of continuous massive wastewater treatment is ensured.

Description

technical field [0001] The invention relates to a method for removing nitrogen and phosphorus from aquaculture wastewater by immobilized algal bacteria, belonging to the field of water body purification. Background technique [0002] my country is a big country in aquaculture, and its output has ranked first in the world for many years. High-density aquaculture meets people's growing demand for aquatic products, but the aquaculture wastewater rich in nitrogen and phosphorus pollutants has gradually become a new source of pollution. Based on the dual reasons of water resource shortage and increasingly serious environmental pollution, the purification treatment and resource utilization of aquaculture wastewater have received extensive attention. At present, the purification and reuse of aquaculture wastewater is still in its infancy in China, and the traditional sewage treatment process based on biofilm method is widely used. Although this type of traditional process can eff...

Claims

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Application Information

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IPC IPC(8): C02F3/32C02F3/34C12N11/10C12N11/04C12R1/89C02F101/10C02F101/16C02F103/20
CPCC02F3/325C02F3/348C02F2101/105C02F2101/16C02F2101/163C02F2101/166C02F2103/20C12N11/04C12N11/10
Inventor 任洪艳陈红芬阮文权
Owner JIANGNAN UNIV
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