Constant pressure aeration enhanced rapid degradation method for pollutants in domestic sewage by using aerobic activated sludge

A technology of aeration pressure and domestic sewage, applied in water/sludge/sewage treatment, chemical instruments and methods, biological water/sewage treatment, etc. Simple operation and equipment structure, and the effect of improving the utilization rate

Inactive Publication Date: 2015-12-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims to solve the problems of low oxygen utilization rate and large energy consumption in the existing sewage treatment method, and provides a method for rapid degradation of domestic sewage pollutants by aerobic activated sludge with constant aeration pressure

Method used

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  • Constant pressure aeration enhanced rapid degradation method for pollutants in domestic sewage by using aerobic activated sludge
  • Constant pressure aeration enhanced rapid degradation method for pollutants in domestic sewage by using aerobic activated sludge
  • Constant pressure aeration enhanced rapid degradation method for pollutants in domestic sewage by using aerobic activated sludge

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specific Embodiment approach 1

[0011] Specific implementation mode one: combine figure 1 To illustrate this embodiment, the constant aeration pressure of this embodiment strengthens the rapid degradation method of aerobic activated sludge to domestic sewage pollutants, and proceeds according to the following steps:

[0012] The domestic sewage is passed into the reactor containing the domesticated aerobic activated sludge, the air compressor supplies oxygen to the reactor, and the reactor is operated at a constant aeration pressure, and the aeration is adjusted by adjusting the opening degree of the exhaust valve of the reactor The pressure index is 0.1-0.6MPa, and the hydraulic retention time is 3±0.2h, which can realize the rapid degradation of pollutants.

[0013] The aerobic activated sludge domestication method of this embodiment: put the aerobic activated sludge into the reaction kettle, use an air compressor to supply oxygen to the reaction kettle, supply oxygen twice in 24 hours, and feed air for 3 ...

specific Embodiment approach 2

[0014] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the domesticated aerobic activated sludge is the activated sludge in the aeration tank in the denitrification and phosphorus removal process, and the sludge MLSS is 3.5-4.5g / L. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the domesticated aerobic activated sludge is the activated sludge in the aeration tank in the denitrification and phosphorus removal process, and the sludge MLSS is 4.0g / L . Others are the same as in the first embodiment.

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Abstract

The invention discloses a constant pressure aeration enhanced rapid degradation method for pollutants in domestic sewage by using aerobic activated sludge and relates to a rapid degradation method for pollutants in domestic sewage. The method disclosed by the invention aims to solve the problem that an existing sewage treatment method is low in oxygen utilization and great in energy consumption. The method comprises: introducing the domestic sewage into a reaction kettle containing acclimated aerobic activated sludge; supplying oxygen to the reaction kettle by an air compressor; and operating the reaction kettle with constant aerating pressure to rapidly degrade pollutants in the sewage, wherein the aerating pressure index is adjusted to 0.1-0.6MPa by adjusting the open degree of an exhaust valve of the reaction kettle, and the hydraulic retention time is 3+/-0.2 hours. Through adopting the method provided by the invention to remove the pollutants in a polluted water body, the oxygen utilization ratio can be improved; COD in the water body can be reduced by about 58% within 3 hours, ammonia nitrogen is reduced by about 45%, and total phosphorus is reduced by about 95%. The method disclosed by the invention is used in the field of sewage treatment.

Description

technical field [0001] The invention relates to a method for rapidly degrading domestic sewage pollutants. Background technique [0002] Our country has a vast territory and abundant fresh water resources, but due to our large population base, the per capita fresh water resources are very small. At the same time, with the rapid development of the economy, the intensification of pollutant discharge has led to serious water pollution in our country. According to the "2015 Bulletin on the State of the Environment in China", the coverage rate of water bodies below Class III in my country's major water systems is 31.1%, the water in lakes and reservoirs is as high as 38.7%, the pollution rate of groundwater is even higher, and the observation stations with poor water quality have reached 57.3% %. It can be seen from this that the water pollution problem facing our country is still severe, so it poses a greater challenge to the water treatment industry, and the deep reduction of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12
CPCY02W10/10
Inventor 赫俊国冯靖涵辛晓东赵聪
Owner HARBIN INST OF TECH
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