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A method for treating wastewater using a carrier fluidized biofilm reactor

A technology for treating wastewater and biochemical reactions, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problems of unfavorable operation and management of activated sludge method with suspended solids content, etc. Achieve excellent wastewater treatment effect, high degree of automation control, and improve the effect of sedimentation performance

Active Publication Date: 2019-03-08
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the defects in the conventional carrier fluidized biofilm reactor in the prior art that the content of suspended solids is still high after sedimentation treatment, and that the activated sludge method is not conducive to operation and management, and to provide a method that utilizes A method for treating wastewater with a carrier fluidized biofilm reactor. This method not only overcomes the shortcomings of conventional carrier fluidized biofilm reactors that still have a high content of suspended solids after sedimentation treatment, but also has the advantages of fast film formation and anti-fouling. Strong impact ability, good treatment effect, convenient operation and management, etc.

Method used

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  • A method for treating wastewater using a carrier fluidized biofilm reactor

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Embodiment 1

[0044] This example is used to illustrate the method for treating wastewater using a carrier fluidized biofilm reactor of the present invention.

[0045] The basic situation of the wastewater to be treated (in actual production, the wastewater treatment process is a dynamic treatment process, and the indicators of wastewater are usually within a certain range): COD is 500-600mg / L, BOD is 180-350mg / L, ammonia nitrogen It is 20-35mg / L, the oil content is 15-30mg / L, and the suspended solids content is 100-200mg / L.

[0046] A columnar suspension carrier with a diameter of 2.5cm, a thickness of 0.8cm and a specific gravity of 0.98 was placed in the biochemical reaction tank. The filling rate of the columnar suspension carrier in the biochemical reaction tank was 35% based on the stacking volume, and perforations were installed at the bottom of the biochemical reaction tank. Pipe aeration system, the aforementioned wastewater to be treated is passed into the biochemical reaction tan...

Embodiment 2

[0049] This example is used to illustrate the method for treating wastewater using a carrier fluidized biofilm reactor of the present invention.

[0050] The basic situation of the wastewater to be treated (in actual production, the wastewater treatment process is a dynamic treatment process, and the indicators of wastewater are usually within a certain range): COD is 500-600mg / L, BOD is 180-350mg / L, ammonia nitrogen It is 20-35mg / L, the oil content is 15-30mg / L, and the suspended solids content is 100-200mg / L.

[0051] A spherical suspension carrier with a diameter of 2.5cm and a specific gravity of 0.98 is placed in the biochemical reaction tank. The filling rate of the spherical suspension carrier in the biochemical reaction tank is 25% based on the stacking volume, and a perforated tube aeration system is installed at the bottom of the biochemical reaction tank. , the aforementioned wastewater to be treated is passed into the biochemical reaction tank for treatment, and th...

Embodiment 3

[0054] This example is used to illustrate the method for treating wastewater using a carrier fluidized biofilm reactor of the present invention.

[0055] The basic situation of the wastewater to be treated (in actual production, the wastewater treatment process is a dynamic treatment process, and the indicators of wastewater are usually within a certain range): COD is 500-600mg / L, BOD is 180-350mg / L, ammonia nitrogen It is 20-35mg / L, the oil content is 15-30mg / L, and the suspended solids content is 100-200mg / L.

[0056] A columnar suspension carrier with a diameter of 2.5cm, a thickness of 0.8cm and a specific gravity of 0.98 was placed in the biochemical reaction tank. The filling rate of the columnar suspension carrier in the biochemical reaction tank was 45% based on the stacking volume, and perforations were installed at the bottom of the biochemical reaction tank. Pipe aeration system, the aforementioned wastewater to be treated is passed into the biochemical reaction tan...

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Abstract

The invention discloses a method for treating wastewater by using a carrier fluidized biomembrane reactor. The method comprises the following steps: sequentially treating wastewater to be treated in a biochemical reaction tank, a mixing tank and a precipitation tank, discharging a supernatant in the precipitation tank, and returning at least parts of sludge at the bottom of the precipitation tank to the biochemical reaction tank, wherein active carbon is added to water discharged from the biochemical reaction tank, and the active carbon and the discharged water are uniformly mixed in the mixing tank. The method can effectively reduce the content of suspensions in water finally obtained after treatment, and also has the advantages of excellent wastewater treatment effect, fast biomembrane formation speed, strong impact resistance, good treatment effect, and convenient running and management.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating wastewater by utilizing a carrier fluidized biological membrane reactor. Background technique [0002] The carrier fluidized biofilm reactor is a biofilm wastewater biochemical treatment device for wastewater treatment, that is, a certain amount of specific gravity is filled in the biological oxidation reaction tank (the specific gravity is the ratio of the density of the biofilm suspended carrier to the density of water. ) close to 1 of the biofilm suspension carrier, using the biofilm growing on the suspension carrier and the fully supplied oxygen, through biological oxidation, the pollutants in the wastewater are oxidized and decomposed to achieve the purpose of wastewater purification. The carrier fluidized biofilm biochemical treatment process has the advantages of the general biofilm method, that is, it has the characteristics of high efficiency and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 桑军强
Owner CHINA PETROLEUM & CHEM CORP
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