Method and device for culturing AGS (aerobic granular sludge)

A technology of aerobic granular sludge and anaerobic granular sludge, which is applied to the device for cultivating it, uses anaerobic granular sludge to induce the cultivation of aerobic granular sludge, and cultivates aerobic granular sludge, which can solve the harsh conditions; In 1998, Heijnen and van Loosdrech applied for the problems of aerobic granular sludge, non-dense structure, and fine particles.

Inactive Publication Date: 2018-06-22
SHANGHAI HEYUAN ENVIRONMENTAL PROTECTION GRP +1
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Problems solved by technology

Since then, researchers have also cultivated similar self-fixing particles in an aerobic state. For example, in the early days, Vander Hoek, De Beer and Van Benthum et al. used carriers to cultivate aerobic granular sludge, and the effect of the particles was not ideal; until In 1991, MishimaI and others cultivated aerobic granular sludge in BAS (Bio-film airlift suspension, continuous airlift reactor), but this was only cultivated under pure oxygen aeration, and the formation conditions were very harsh; 1998 Heijnen and van Loosdrech applied for a patent on aerobic granular sludge in 1990; and by the end of the 1990s, the research and application

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  • Method and device for culturing AGS (aerobic granular sludge)
  • Method and device for culturing AGS (aerobic granular sludge)
  • Method and device for culturing AGS (aerobic granular sludge)

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Embodiment 1

[0065] A method of using anaerobic granular sludge to induce and cultivate aerobic granular sludge in the present embodiment 1, the specific steps are as follows:

[0066] (1) SBAR reactor such as image 3 As shown, the diameter of the inner pipe 2 is 60mm, the height is 900mm, the diameter of the outer pipe 1 is 110mm, the height is 1100mm, the total volume is 8L, the effective volume is 6L, the height-to-diameter ratio H / D is 10, and the aeration position is set At the bottom of the inner tube 2, the reactor is controlled by a time controller 11 and an overflow device 7;

[0067] (2) The activated sludge inoculated is taken from the return sludge of the secondary settling tank of the municipal sewage treatment plant. It is dark brown, loose in appearance, irregular in shape, and small in floc. 50% of the container volume;

[0068] (3) Using artificial simulated domestic sewage, sucrose, beef extract peptone and potato starch were used as carbon sources, and the peptone and...

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Abstract

The invention belongs to the field of wastewater treatment and particularly discloses a method and a device for culturing AGS (aerobic granular sludge). The culture method comprises steps of manual simulation wastewater preparation, inoculation, sludge culture and the like and specifically comprises the steps as follows: traditional activated sludge is taken as inoculated sludge, an SBAR (sequencing batch airlift reactor) is inoculated with the activated sludge after aeration, circulating culture is sequentially performed in a water inlet-aeration-sedimentation-drainage-anaerobic manner, anaerobic granular sludge is added after the sludge is acclimatized and stabilized, crystal nucleuses for inducing growth of aerobes is provided, and the AGS is prepared after a certain period of culture.Compared with AGS obtained through culture of common activated sludge, the AGS has greater advantages in the aspects of granule specific gravity, settling rate and microbial activity.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and relates to a method for cultivating aerobic granular sludge, in particular to a method for using anaerobic granular sludge to induce and cultivate aerobic granular sludge, and a device for cultivating it. Background technique [0002] Aerobic granular sludge (AGS) is between activated sludge and biofilm, but it has higher microbial activity and tolerance than suspended biological filler. It is a new treatment technology in recent years. Compared with flocculent sludge, aerobic granular sludge has excellent settling performance, good treatment effect on organic matter per unit volume, can withstand high impact load, reduces volume requirements for secondary sedimentation tanks, and can simultaneously denitrify The characteristics of phosphorus removal. For the cultivation of aerobic granular sludge, because researchers are based on different methods and experimental conditions, i...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F3/34
CPCC02F3/12C02F3/34C02F2203/004C02F2305/06Y02W10/10
Inventor 李诗恬王瑞刘振鸿刘头水
Owner SHANGHAI HEYUAN ENVIRONMENTAL PROTECTION GRP
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