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Enhanced synchronous nitrification and denitrification process for adding AHLs signal molecules into biological moving bed process

A technology of biological moving bed and signal molecules, which is applied in the field of sewage treatment, can solve the problems such as long start-up period of film formation, and achieve the effects of increasing biodiversity, increasing biomass, and increasing biological activity

Active Publication Date: 2019-12-06
DALIAN UNIV OF TECH
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Problems solved by technology

At present, this process has the disadvantage of a long start-up period for film formation, and the formation of biofilm is affected by many factors, including fluid dynamics, nutrients, microbial species and solid surface properties, etc.

Method used

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  • Enhanced synchronous nitrification and denitrification process for adding AHLs signal molecules into biological moving bed process

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Embodiment

[0023] figure 1 It is a schematic diagram of the reaction device of this embodiment.

[0024] 1) Add the modified polymer suspended biological carrier (filler) to the IFFAS reactor, and the dosage of the biological carrier (filler) is 30% of the effective volume of the reactor;

[0025] 2) Start the IFFAS reactor with the return sludge from the secondary sedimentation tank of the municipal sewage treatment plant, and use the closed-circuit circulation method to hang the film. During this period, add 25nmol / L AHLs-like quorum-sensing signal molecule mixture to the influent, and the mixture is C4-HSL (N-Butyryl-DL-homoserine lactone), C8-HSL (N-Octanoyl-DL-homoserine lactone), 3OHC12-HSL (N-(3-Hydroxydodecanoyl)-DL-homoserine lactone), C14-HSL (N-Tetradecanoyl -DL-homoserine lactone) equal mass mixed, the sludge concentration in the reactor after inoculation is 2500mg / L;

[0026] 3) The reactor adopts a continuous flow water inlet method, and the water inlet flow rate is contr...

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Abstract

The invention discloses an enhanced synchronous nitrification and denitrification process for adding AHLs signal molecules into a biological moving bed process, and belongs to the technical field of sewage treatment. According to the present invention, the process is based on a biological moving bed process, and comprises: improving the biological film forming process and the operating process ina moving bed biofilm process and a biofilm and active sludge composite process, and adding AHLs signal molecules, such that the quorum sensing QS crucial to the formation of bacterial biofilms can bepromoted; and a certain proportion of the AHLs signal molecule mixture with a certain concentration is added to the biological moving bed process, such that the biological activity is improved, the biomass is increased, the growth and biofilm formation of the biological film on the carrier is accelerated, the functional bacterial flora structure in the system is optimized, the biological diversityof the system is improved, the synchronous nitrification and denitrification nitrogen removal effect of the system is further enhanced, and the ammonia nitrogen and the total nitrogen in the effluentcan meet the requirements of standard emission.

Description

technical field [0001] The invention relates to a moving bed biofilm process and a composite process of biofilm and activated sludge. Based on this, adding AHLs quorum sensing signal molecules can strengthen synchronous nitrification and denitrification in wastewater treatment, and belongs to the technical field of sewage treatment. Background technique [0002] With the development of my country's economy, the process of industrialization and urbanization is accelerating, and the damage to the ecological environment is increasing. The nitrogen pollution of the water environment and the eutrophication of the water body are becoming more and more serious. question. According to the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) promulgated by our country, the discharge limits for ammonia nitrogen and total nitrogen are divided into three levels, and the first level is divided into A standard and B standard. Now the state requires all The disc...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/302
Inventor 刘涛徐嘉蔚全燮
Owner DALIAN UNIV OF TECH
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