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Microflora-based sewage treatment aeration system control method

A technology of microbial community and control method, applied in the field of sewage treatment aeration system control based on microbial community, can solve problems such as poor pollutant removal effect and poor sludge sedimentation effect, and achieve the effect of ensuring efficient and stable operation

Pending Publication Date: 2022-06-03
NANJING UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem of system instability such as poor pollutant removal effect or poor sludge sedimentation effect caused by dissolved oxygen fluctuations, the present invention measures water quality, activated sludge, and the population structure of microorganisms in activated sludge from the perspective of microbial communities. information, and use this information for LSTM network model construction

Method used

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  • Microflora-based sewage treatment aeration system control method
  • Microflora-based sewage treatment aeration system control method
  • Microflora-based sewage treatment aeration system control method

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Embodiment

[0053] The present embodiment discloses a microbial community-based control method for a sewage treatment aeration system, comprising the following steps:

[0054] S101. Select a sewage treatment system as the implementation object. The system adopts the activated sludge method to treat municipal sewage, and the sewage treatment capacity is 400L / day.

[0055] S102, every 2 hours, take the activated sludge in the reactor as a sample, measure the sludge concentration, sludge volume index, and dissolved oxygen concentration of the activated sludge, and collect activated sludge samples for bacterial community structure analysis.

[0056] The above-mentioned relevant determinations and sludge sampling were completed within 2 hours. Determination of microbial community structure in activated sludge based on 16SrRNA gene high-throughput sequencing.

[0057] S103 , the sampling process lasts for 50 days, and 4-5 sets of data are obtained every day, and data including relative abundan...

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Abstract

The invention discloses a sewage treatment aeration system control method based on microbial communities, and belongs to the field of wastewater treatment. The method comprises the following steps: firstly, constructing a long short-term memory (LSTM) network model on the basis of sludge concentration, sludge volume index, dissolved oxygen concentration and active sludge microflora structure data; training the model by adopting sludge concentration, sludge volume index, dissolved oxygen concentration and activated sludge microflora structure data obtained under the conditions that a sewage treatment system normally runs and the sludge performance is good, and then calculating the optimal aeration rate in an application state by adopting the trained model and performing aeration control. The dissolved oxygen regulation and control method provided by the invention can effectively reduce the abundance of microorganisms causing poor sludge performance (sludge bulking or foaming) in a sewage treatment system, so that the efficient and stable operation of the system is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to a method for controlling aeration system of sewage treatment based on microbial community. Background technique [0002] Dissolved oxygen concentration is one of the key indicators for the operation of activated sludge wastewater biological treatment system. Too high dissolved oxygen concentration will lead to high energy consumption and poor removal of total nitrogen; while low dissolved oxygen concentration may lead to poor removal of organic matter and ammonia nitrogen. It can also lead to the proliferation of filamentous bacteria and the phenomenon of sludge bulking. On the other hand, dissolved oxygen is one of the important survival factors of microorganisms. The change of dissolved oxygen will lead to changes in the microbial community structure of activated sludge, which will affect the removal efficiency of pollutants, and even affect the stable operation of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F7/00G06N3/04G06N3/08
CPCC02F3/12C02F7/00G06N3/08G06N3/048G06N3/044Y02W10/10
Inventor 叶林芮栋妮吴兵张徐祥任洪强
Owner NANJING UNIV
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