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Aerobic granular sludge rapid culture and stabilization method based on quorum sensing signal molecule synthesis

A technology of aerobic granular sludge and quorum sensing signal, applied in aerobic process treatment, sustainable biological treatment, bacteria and other directions, can solve the problems of aerobic granular sludge time-consuming, weak decontamination ability and instability, etc. Achieve the effect of improving pollutant removal capacity, enhancing stability, and shortening granulation time

Pending Publication Date: 2021-03-26
华润环保发展有限公司
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that the aerobic granular sludge cultivated in the existing method is time-consuming, weak and unstable in the early stage of decontamination, and a method for rapid cultivation and stabilization of aerobic granular sludge based on the synthesis of quorum sensing signal molecules is provided

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  • Aerobic granular sludge rapid culture and stabilization method based on quorum sensing signal molecule synthesis
  • Aerobic granular sludge rapid culture and stabilization method based on quorum sensing signal molecule synthesis
  • Aerobic granular sludge rapid culture and stabilization method based on quorum sensing signal molecule synthesis

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Embodiment 1 to 5

[0049] Set up 5 identical aeration tanks (R1 to R5, corresponding to Examples 1 to 5), and operate according to the mode of "10min water intake-100min anoxic-100min aerobic" mode, wherein, the influent COD=600mg / L, ammonia nitrogen 100mg / L, total phosphorus 40mg / L. By adding sodium sulfate to the influent, the sulfate concentrations in the influent water of the five aeration tanks are respectively 0, 50, 200, 500, and 1000 mg / L. After continuous operation for 130 days, the removal of total phosphorus in 5 aeration tanks, the formation of aerobic granular sludge and the concentration of AHLs signal molecules in the sludge were monitored. See the monitoring results Figures 1 to 4 .

[0050] Depend on figure 1 The result shows that:

[0051] When the concentration of sulfate in the water increases moderately (0-500mg / L), the biological phosphorus removal efficiency of the aerobic granular sludge reactor increases from 20% to 80%, which confirms the effect of appropriate con...

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Abstract

The invention discloses an aerobic granular sludge rapid culture and stabilization method based on quorum sensing signal molecule synthesis, and relates to the technical field of activated sludge culture. According to the method, aerobic activated sludge is used as seed sludge so that the formation of aerobic granular sludge is accelerated, and the granulation time is shortened; sulfate is added into inlet water of an aeration tank, and aerobic bacteria and sulfate reducing bacteria in activated sludge are symbiotic by utilizing an up-regulation action mechanism of sulfate on synthesis of quorum sensing signal molecule homoserine lactones (AHLs), so that the stability of the core region in granular sludge is maintained; and thus, the stability of the aerobic granular sludge in the long-term operation process is enhanced, and the pollutant removal capacity of the sludge in the earlier stage of granulation is improved.

Description

technical field [0001] The invention relates to the technical field of activated sludge cultivation, in particular to a rapid cultivation and stabilization method of aerobic granular sludge based on the synthesis of quorum sensing signal molecules. Background technique [0002] The aerobic granular sludge technology allows the original flocculent activated sludge to naturally aggregate through a specific reactor design and operation mode, and is supported by the extracellular polymer secreted by microorganisms to form a dense spherical sludge with a relatively regular shape. mud particles. The aerobic granular sludge is dense and spherical, and its diameter is usually greater than 0.2mm. According to literature reports, the maximum diameter can reach 16mm. The spherical structure makes the granular sludge have an oxygen mass transfer gradient from the surface to the inside. In the area close to the outer surface (within 700 μm from the surface of the granular sludge), the ...

Claims

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Application Information

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IPC IPC(8): C02F3/02C12N1/20
CPCC02F3/02C12N1/20Y02W10/10
Inventor 薛蔚琦孙临泉陈运龙姜维陈光耀屈茂会
Owner 华润环保发展有限公司
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