CANON-MBBR enhanced AOA water treatment method and system based on BFM form

Abstract

The invention discloses a CANON-MBBR enhanced AOA water treatment method and a CANON-MBBR enhanced AOA water treatment system based on a BFM form, and belongs to the technical field of sewage treatment. The method comprises the following steps: sewage to be treated enters an anaerobic zone, and effluent of the anaerobic zone enters a carbon enrichment zone; supernate obtained in the carbon enrichment area enters the autotrophic MBBR area, and obtained sludge is discharged from an outlet end at the bottom of the carbon enrichment area and is conveyed to the aerobic IFAS area through a pipeline connected with a sludge overrunning pump; the effluent of the aerobic IFAS zone enters the anoxic zone, and the effluent of the anoxic zone enters the secondary sedimentation zone. The autotrophic MBBR area serves as a nitrification and denitrification main body, it is guaranteed that the ammoxidation rate is 80-90%, the aerobic IFAS area conducts targeted removal on a small amount of ammonia nitrogen carried by effluent of the autotrophic MBBR area and part of ammonia nitrogen caused by sludge exceeding, and the method has the advantages of being excellent in denitrification effect and nitrification effect, high in impact resistance, small in occupied area and the like.

Description

technical field

[0001] The invention relates to the technical field of sewage treatment, in particular to a CANON-MBBR enhanced AOA water treatment method and system based on the BFM form. Background technique

[0002] With the proposal of the domestic dual-carbon target, the demand for energy saving and consumption reduction in sewage treatment continues to increase. The AOA process utilizes a lower aerobic / anoxic tank capacity ratio and reduces the consumption of the internal carbon source in the aerobic tank through a smaller aerobic residence time; on the other hand, it also ensures sufficient denitrification tank capacity , when the influent C / N is low, the anoxic tank uses the PHA synthesized in the anaerobic stage, which can ensure a higher denitrification efficiency through the endogenous denitrification effect, and can ensure a higher biological removal efficiency through denitrification and phosphorus removal. Therefore, the demand for external carbon sources for ...

Examples

Embodiment 1

[0087] A certain three groups of sewage treatment plants, numbered 1-3, with a designed water volume of 80m 3 / d, the biochemical section of the device adopts the CANON-MBBR enhanced AOA water treatment system in the form of BFM. According to the mud-water separation effect of the sludge in the anaerobic zone, traditional gravity sedimentation tanks, magnetic separation sedimentation tanks, and high-efficiency sedimentation tanks are used, and HRT is installed. For 1h, the dosage of each device is the same, and the effluent SS of each device is compared and verified. The experimental results are shown in Table 1.

[0088] Table 1 Effluent SS (mg / L) of different mud-water separation processes

[0089]

[0090] The results showed that the sedimentation effect of the gravity sedimentation tank was the worst, and the sludge gas production and floating phenomenon appeared in the later stage, resulting in a further increase of the effluent SS, while the overall sedimentation effe...

Embodiment 2

[0092] A certain five groups of sewage treatment plants, numbered A-E, all adopt the CANON-MBBR enhanced AOA water treatment system in the form of BFM in the biochemical section. For the mud-water separation effect of the sludge in the anaerobic zone, the magnetic separation and precipitation process is adopted, and the single-factor variable is controlled by magnetic separation. Separate the precipitated HRT and set it to 0.3, 0.4, 0.5, 0.6, 0.7 h, respectively. The dosage of each device is the same, and the effluent SS of each device is compared and verified. The experimental results are shown in Table 2.

[0093] Table 2 Effluent SS (mg / L) under different magnetic separation precipitation HRT

[0094]

[0095] The results show that when the magnetic loading precipitation HRT in the carbon enrichment zone is 0.3h, the effluent SS slightly exceeds the standard, and the effluent SS of the system can reach below 200mg / L at 0.4-0.6h, and when the HRT is further extended to 0....

Embodiment 3

[0097] A certain five groups of autotrophic MBBR units based on anaerobic ammonium oxidation, numbered a-e, are all used to treat mainstream municipal sewage. In order to ensure the stable short-range nitrification effect of the system, the optimal dosage is verified by adding hydroxylamine hydrochloride. The results are shown in Table 3.

[0098] Table 3 System denitrification load rate (%) under different hydroxylamine dosage

[0099]

[0100] The results showed that the denitrification load of the CANON-MBBR system also reached the highest when the concentration of hydroxylamine hydrochloride increased from 0 mg / L to 5.0 mg / L. At this time, the nitrous concentration of the system was 4.1 mg / L. The dosing concentration of hydroxylamine hydrochloride and the concentration of nitrous in the system are considered to be the optimum concentrations. When the concentration of hydroxylamine hydrochloride was further increased, the system treatment load rate did not increase but ...

technical field

[0001] The invention relates to the technical field of sewage treatment, in particular to a CANON-MBBR enhanced AOA water treatment method and system based on the BFM form. Background technique

[0002] With the proposal of the domestic dual-carbon target, the demand for energy saving and consumption reduction in sewage treatment continues to increase. The AOA process utilizes a lower aerobic / anoxic tank capacity ratio and reduces the consumption of the internal carbon source in the aerobic tank through a smaller aerobic residence time; on the other hand, it also ensures sufficient denitrification tank capacity , when the influent C / N is low, the anoxic tank uses the PHA synthesized in the anaerobic stage, which can ensure a higher denitrification efficiency through the endogenous denitrification effect, and can ensure a higher biological removal efficiency through denitrification and phosphorus removal. Therefore, the demand for external carbon sources for ...

Examples

Embodiment 1

[0087] A certain three groups of sewage treatment plants, numbered 1-3, with a designed water volume of 80m 3 / d, the biochemical section of the device adopts the CANON-MBBR enhanced AOA water treatment system in the form of BFM. According to the mud-water separation effect of the sludge in the anaerobic zone, traditional gravity sedimentation tanks, magnetic separation sedimentation tanks, and high-efficiency sedimentation tanks are used, and HRT is installed. For 1h, the dosage of each device is the same, and the effluent SS of each device is compared and verified. The experimental results are shown in Table 1.

[0088] Table 1 Effluent SS (mg / L) of different mud-water separation processes

[0089]

[0090] The results showed that the sedimentation effect of the gravity sedimentation tank was the worst, and the sludge gas production and floating phenomenon appeared in the later stage, resulting in a further increase of the effluent SS, while the overall sedimentation effe...

Embodiment 2

[0092] A certain five groups of sewage treatment plants, numbered A-E, all adopt the CANON-MBBR enhanced AOA water treatment system in the form of BFM in the biochemical section. For the mud-water separation effect of the sludge in the anaerobic zone, the magnetic separation and precipitation process is adopted, and the single-factor variable is controlled by magnetic separation. Separate the precipitated HRT and set it to 0.3, 0.4, 0.5, 0.6, 0.7 h, respectively. The dosage of each device is the same, and the effluent SS of each device is compared and verified. The experimental results are shown in Table 2.

[0093] Table 2 Effluent SS (mg / L) under different magnetic separation precipitation HRT

[0094]

[0095] The results show that when the magnetic loading precipitation HRT in the carbon enrichment zone is 0.3h, the effluent SS slightly exceeds the standard, and the effluent SS of the system can reach below 200mg / L at 0.4-0.6h, and when the HRT is further extended to 0....

Embodiment 3

[0097] A certain five groups of autotrophic MBBR units based on anaerobic ammonium oxidation, numbered a-e, are all used to treat mainstream municipal sewage. In order to ensure the stable short-range nitrification effect of the system, the optimal dosage is verified by adding hydroxylamine hydrochloride. The results are shown in Table 3.

[0098] Table 3 System denitrification load rate (%) under different hydroxylamine dosage

[0099]

[0100] The results showed that the denitrification load of the CANON-MBBR system also reached the highest when the concentration of hydroxylamine hydrochloride increased from 0 mg / L to 5.0 mg / L. At this time, the nitrous concentration of the system was 4.1 mg / L. The dosing concentration of hydroxylamine hydrochloride and the concentration of nitrous in the system are considered to be the optimum concentrations. When the concentration of hydroxylamine hydrochloride was further increased, the system treatment load rate did not increase but ...

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