Method for fast realizing short distance deep denitrogenation by SBR process

Abstract

The invention relates to a rapid nitrogenous wastewater biological treatment process, particularly to a method for rapidly realizing short distance deep denitrogenation by SBR process. The prior short distance biological denitrogenation technique is not suitable for treating wastewater with low C / N ratio. The inventive method comprises the steps of feeding water, aerating, adding equal amount of raw wastewater, aerating, adding equal amount of raw wastewater, aerating, adding external carbon source, aerating, settling, draining, and idle running. The temperature in the overall process is controlled at 30-33 DEG C, the water dissolved oxygen concentration during nitration stage is controlled in the range of 0.8-1.2 mg / L, the mean sludge retention time in the system is 12-15 days, and the aeration amount and the denitrification time of the short distance deep denitrogenation by SBR process is controlled based on the change feature of online parameter pH value. The inventive method has the advantages of good denitrogenation effect, high degree of automation, low energy consumption, convenient operation, low cost, and suitability for treatment of wastewater with low C / N ratio.

Description

technical field

[0001] The invention relates to a rapid implementation method of nitrogen-containing wastewater biological treatment process, especially the implementation method of SBR deep denitrification process capable of short-range nitrification and denitrification and process real-time control, which is suitable for nitrogen-containing industrial wastewater treatment and urban sewage depth deal with. Background technique

[0002] With the rapid development of industry and agriculture, human beings have gradually increased their requirements on the quality of the environment, and the phenomenon of eutrophication in the water environment has gradually attracted people's attention. Biological nitrification and denitrification is currently the most commonly used sewage denitrification method. Traditional nitrification is carried out in two steps. First, ammonia oxidizing bacteria (AOB) convert ammonia nitrogen into nitrite; then, nitrite oxidizing bacteria (NOB) convert...

Examples

Embodiment

[0037] The actual domestic sewage discharged from a family area of ​​a certain university was used as the experimental object (pH=6.5-7.8, COD=260-350mg / L, TN=75-80mg / L). The selected SBR reactor has an effective volume of 15L, and water is fed in three times, each water inlet is about 4L, and the COD concentration of the mixed liquid in the reactor is maintained at 200-300mg / L, NH 4 + -N concentration is 55-60mg / L, and the initial sludge concentration in the reactor is 3.5-4.0g.L -1 , The average residence time of the sludge is maintained at about 12-15 days, and the reaction temperature is controlled within the range of 30-33°C by the temperature control device. The external carbon source is 95% ethanol. Specific steps are as follows:

[0038] 1 The SBR reactor with an effective volume of 15L is used for water inlet. First, open the water inlet valve, start the water inlet pump to inject the waste water to be treated into the SBR reactor, start the agitator, and set the w...

technical field

[0001] The invention relates to a rapid implementation method of nitrogen-containing wastewater biological treatment process, especially the implementation method of SBR deep denitrification process capable of short-range nitrification and denitrification and process real-time control, which is suitable for nitrogen-containing industrial wastewater treatment and urban sewage depth deal with. Background technique

[0002] With the rapid development of industry and agriculture, human beings have gradually increased their requirements on the quality of the environment, and the phenomenon of eutrophication in the water environment has gradually attracted people's attention. Biological nitrification and denitrification is currently the most commonly used sewage denitrification method. Traditional nitrification is carried out in two steps. First, ammonia oxidizing bacteria (AOB) convert ammonia nitrogen into nitrite; then, nitrite oxidizing bacteria (NOB) convert...

Examples

Embodiment

[0037] The actual domestic sewage discharged from a family area of ​​a certain university was used as the experimental object (pH=6.5-7.8, COD=260-350mg / L, TN=75-80mg / L). The selected SBR reactor has an effective volume of 15L, and water is fed in three times, each water inlet is about 4L, and the COD concentration of the mixed liquid in the reactor is maintained at 200-300mg / L, NH 4 + -N concentration is 55-60mg / L, and the initial sludge concentration in the reactor is 3.5-4.0g.L -1 , The average residence time of the sludge is maintained at about 12-15 days, and the reaction temperature is controlled within the range of 30-33°C by the temperature control device. The external carbon source is 95% ethanol. Specific steps are as follows:

[0038] 1 The SBR reactor with an effective volume of 15L is used for water inlet. First, open the water inlet valve, start the water inlet pump to inject the waste water to be treated into the SBR reactor, start the agitator, and set the w...

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