Low-energy-consumption sewage treatment method for removing nitrate by utilizing alga photosynthesis

Abstract

The invention discloses a low-energy-consumption sewage treatment method for removing nitrate by utilizing alga photosynthesis, and belongs to the technical field of nitrate removal sewage treatment.The low-energy-consumption sewage treatment method comprises the following specific steps: high-nitrate-resistant denitrifying bacteria are domesticated and prepared; then, high-nitrate sewage and returned activated sludge enter an aeration tank together to form a mixed solution in the aeration tank, organic matters in the high-nitrate sewage are in full contact with the high-nitrate-resistant denitrifying bacteria, and the high-nitrate-resistant denitrifying bacteria treat the high-nitrate sewage; and alga plates attached with alga plants are fixedly mounted on the peripheral side walls of the inner cavity of a sedimentation tank, an environment suitable for the growth of alga plants is built in the sedimentation tank, in the growth process of algae, nitrate and other substances in seawater are absorbed through photosynthesis, nitrate is decomposed into nitrogen and oxygen to reduce the concentration of nutritive salt in seawater. The nitrate purification is achieved through photosynthesis of algae, and the nitrate absorption and purification efficiency is high.

Description

technical field

[0001] The invention relates to the technical field of nitrate-removing sewage treatment, in particular to a low-energy-consumption sewage treatment method utilizing algae photosynthesis to remove nitrate. Background technique

[0002] Nitrate is an important physical and chemical indicator of water quality in aquaculture. Elevated nitrate content not only indicates the lack of oxygen at the bottom of the pond and the deterioration of aquaculture water quality, but also the cause of aquatic animals' susceptibility to diseases. Most of the current water treatment processes are based on the application of biological Filtration method is used to remove ammonia and nitrate in water. Porous biological filter material is placed in the biofilter, and certain microorganisms are directional cultivated, relying on the autotrophy or heterotrophy of microorganisms to decompose ammonia and nitrate in water. However, the microorganisms of biological filtration are easily a...

Examples

Embodiment

[0024] A low-energy sewage treatment method utilizing algae photosynthesis to remove nitrate, the specific steps of low-energy sewage treatment are:

[0025] Step 1: Import the high nitrate sewage into the sewage treatment equipment for centralized treatment, first discharge the sewage into the coarse grid tank for treatment, and then discharge the high nitrate sewage treated in the coarse grid tank to the fine grid processing in the grid pool;

[0026] Step 2: Domestication and preparation of bacteria resistant to high nitrate denitrification:

[0027] (1) Add bacterial colony culture solution to the petri dish, place the strains of denitrifying bacteria in the culture medium for cultivation, after the cultivation, add 0.1% salt water to the petri dish, stir evenly, and acclimatize and cultivate After 24 hours, extract the denitrifying bacteria with higher activity in the petri dish;

[0028] (2) Repeat the above steps, and gradually increase the concentration of brine adde...

technical field

[0001] The invention relates to the technical field of nitrate-removing sewage treatment, in particular to a low-energy-consumption sewage treatment method utilizing algae photosynthesis to remove nitrate. Background technique

[0002] Nitrate is an important physical and chemical indicator of water quality in aquaculture. Elevated nitrate content not only indicates the lack of oxygen at the bottom of the pond and the deterioration of aquaculture water quality, but also the cause of aquatic animals' susceptibility to diseases. Most of the current water treatment processes are based on the application of biological Filtration method is used to remove ammonia and nitrate in water. Porous biological filter material is placed in the biofilter, and certain microorganisms are directional cultivated, relying on the autotrophy or heterotrophy of microorganisms to decompose ammonia and nitrate in water. However, the microorganisms of biological filtration are easily a...

Examples

Embodiment

[0024] A low-energy sewage treatment method utilizing algae photosynthesis to remove nitrate, the specific steps of low-energy sewage treatment are:

[0025] Step 1: Import the high nitrate sewage into the sewage treatment equipment for centralized treatment, first discharge the sewage into the coarse grid tank for treatment, and then discharge the high nitrate sewage treated in the coarse grid tank to the fine grid processing in the grid pool;

[0026] Step 2: Domestication and preparation of bacteria resistant to high nitrate denitrification:

[0027] (1) Add bacterial colony culture solution to the petri dish, place the strains of denitrifying bacteria in the culture medium for cultivation, after the cultivation, add 0.1% salt water to the petri dish, stir evenly, and acclimatize and cultivate After 24 hours, extract the denitrifying bacteria with higher activity in the petri dish;

[0028] (2) Repeat the above steps, and gradually increase the concentration of brine adde...