Nitrogen and phosphorus removal method based on MBBR (moving bed biofilm reactor) technology

Abstract

The invention discloses a nitrogen and phosphorus removal treatment method based on an MBBR (moving bed biofilm reactor) technology, and belongs to the field of wastewater treatment. In the method, apre-anoxic zone, an anaerobic zone, a first anoxic zone, a second anoxic zone, an MBBR aerobic zone, a low dissolved oxygen zone and a rear anoxic internal reflux zone are included, wherein the anaerobic zone is communicated with the first anoxic zone through an upper part rectangular water through hole in the middle of a partition wall between the anaerobic zone and the first anoxic zone; the first anoxic zone is communicated with the second anoxic zone through a lower part rectangular water through hole in one side end of a partition wall between the first anoxic zone and the second anoxic zone; the second anoxic zone is communicated with the MBBR aerobic zone through an upper part rectangular water through hole in the outer side end of a partition wall between the second anoxic zone andthe MBBR aerobic zone; the MBBR aerobic zone is communicated with the low dissolved oxygen zone through a plurality of groups of parallel circular water holes with the upper parts being submerged inmuddy water in one end side of a partition wall between the MBBR aerobic zone and the low dissolved oxygen zone. The method overcomes the defect of insufficient effect in terms of advanced nitrogen removal in the existing traditional technology, and can be applied to the construction of nitrogen removal treatment facilities for wastewater.

Description

technical field

[0001] The invention relates to a treatment method for nitrogen and phosphorus removal based on an MBBR process, which belongs to the field of sewage treatment. Background technique

[0002] The problem of water resources has seriously affected social and economic development. Sewage resource utilization based on the comprehensive utilization of urban reclaimed water is an effective way to protect water resources and increase the value of water resources. At the same time, it can also greatly alleviate the shortage of water resources in my country. The national policy advocates the development of circular economy. The circular economy projects represented by the recycling of sewage are encouraged by the state and supported by policies. In addition, many lake basins in my country are facing water shortages, serious pollution, and restrictions on fresh water resources. Many enterprises use reclaimed water as industrial make-up water; industries such as pharmaceu...

Examples

example 1

[0037] For an underground municipal sewage treatment plant in a certain city, the influent design water volume is 90,000m³ / day, the influent COD concentration is 500mg / L, BOD concentration is 250mg / L, NH4-N concentration is 40mg / L, TN level is 50mg / L, and TP is 6mg / L, using the present invention, the characteristics of the added cylindrical suspension carrier are: the material is HDPE, the specific gravity is 0.95g / cm3, the diameter is 25mm, the height is 10mm, the porosity is ≥88%, the bulk density is ≥100kg / m³, and the effective ratio The surface area is ≥500㎡ / m³; the wedge-shaped steel wire mesh cylinder screen is used to ensure that the suspended carrier does not accumulate on the water-passing section; the HRT of the pre-anoxic zone of the project is 0.45h, and the HRT of the anaerobic zone is 1.5h. The HRT of the oxygen zone is 2.5h, the HRT of the first anoxic zone is 2.5h, the HRT of the MBBR aerobic zone is 4h, the filling rate of the added suspension carrier is 30%, a...

technical field

[0001] The invention relates to a treatment method for nitrogen and phosphorus removal based on an MBBR process, which belongs to the field of sewage treatment. Background technique

[0002] The problem of water resources has seriously affected social and economic development. Sewage resource utilization based on the comprehensive utilization of urban reclaimed water is an effective way to protect water resources and increase the value of water resources. At the same time, it can also greatly alleviate the shortage of water resources in my country. The national policy advocates the development of circular economy. The circular economy projects represented by the recycling of sewage are encouraged by the state and supported by policies. In addition, many lake basins in my country are facing water shortages, serious pollution, and restrictions on fresh water resources. Many enterprises use reclaimed water as industrial make-up water; industries such as pharmaceu...

Examples

example 1

[0037] For an underground municipal sewage treatment plant in a certain city, the influent design water volume is 90,000m³ / day, the influent COD concentration is 500mg / L, BOD concentration is 250mg / L, NH4-N concentration is 40mg / L, TN level is 50mg / L, and TP is 6mg / L, using the present invention, the characteristics of the added cylindrical suspension carrier are: the material is HDPE, the specific gravity is 0.95g / cm3, the diameter is 25mm, the height is 10mm, the porosity is ≥88%, the bulk density is ≥100kg / m³, and the effective ratio The surface area is ≥500㎡ / m³; the wedge-shaped steel wire mesh cylinder screen is used to ensure that the suspended carrier does not accumulate on the water-passing section; the HRT of the pre-anoxic zone of the project is 0.45h, and the HRT of the anaerobic zone is 1.5h. The HRT of the oxygen zone is 2.5h, the HRT of the first anoxic zone is 2.5h, the HRT of the MBBR aerobic zone is 4h, the filling rate of the added suspension carrier is 30%, a...

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