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Application of charcoal particles in acclimation of anaerobic activated sludge, anaerobic activated sludge and acclimation method and application of anaerobic activated sludge

A technology of biochar and oxygen activity, applied in the direction of using microorganisms, anaerobic digestion treatment, etc., can solve the problems of greater influence of hydrogen partial pressure and slow electron transfer speed, so as to slow down the influence of inhibitory substances and increase pH Buffer capacity, the effect of buffering pH drop

Pending Publication Date: 2021-01-19
GUOTOU BIO TECH INVESTMENT CO LTD +1
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Problems solved by technology

[0002] Electron transfer plays a key role in the material transformation of microorganisms, and in the traditional anaerobic digestion process, the interspecies electron transfer between acidogenic bacteria and methanogenic bacteria is mainly through H 2 Or other soluble small molecular substances as the medium, H 2 In the anaerobic environment, it is transferred in the form of diffusion, and the electron transfer speed is slow; in addition, it is greatly affected by the partial pressure of hydrogen in the anaerobic digestion system, and conditions such as fluctuations in the organic load of the substrate can easily cause excessive accumulation of VFAs (volatile fatty acids) , causing acidification of the reactor, inhibiting the activity of methanogens

Method used

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  • Application of charcoal particles in acclimation of anaerobic activated sludge, anaerobic activated sludge and acclimation method and application of anaerobic activated sludge
  • Application of charcoal particles in acclimation of anaerobic activated sludge, anaerobic activated sludge and acclimation method and application of anaerobic activated sludge

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preparation example Construction

[0017] According to the present invention, the preparation method of the biochar particles derived from the flower carapace can refer to the preparation method of biochar (for example, fruit shell carbon) in the prior art, but the inventors of the present invention found in the research that through the following method The effects of the present invention can be further enhanced when biochar particles derived from carapaces are prepared. The preparation method of the preferred biochar particles derived from carapacea comprises: roasting the pulverized carapace particles under a first inert atmosphere, followed by drying, purging and sieving after the roasting to obtain the biochar particles.

[0018] According to the present invention, preferably, a washing step is further included before crushing the flower carapace. The washing can be conventional washing, for example, washing with water, as long as the attachments on the carapace can be cleaned.

[0019] According to the...

Embodiment approach

[0034] According to a preferred embodiment of the present invention, the water content of the bottom mud is 46-63% by weight, for example, it can be 46% by weight, 49% by weight, 52% by weight, 55% by weight, 58% by weight, 60% by weight %, 63% by weight, preferably 53-59% by weight.

[0035] According to a preferred embodiment of the present invention, the bottom mud also contains iron element, which can exist in the bottom mud itself or can be added artificially. Preferably, relative to the bottom mud per kilogram in dry weight, the The content of the iron element is 16090-28307 mg, preferably 20000-25100 mg. In this preferred embodiment, the effects of the present invention can be further enhanced.

[0036] Wherein, the determination method of the content of iron element is: after the mud sample is digested with concentrated nitric acid, the iron element is determined by inductively coupled plasma atomic emission spectrometry (ICP-AES).

[0037] Unless stated otherwise, t...

preparation example 1

[0053] This preparation example is used to illustrate the preparation method of biochar particles

[0054] (1) Wash the carapace and crush it into carapace particles with a size less than 1.5 mm.

[0055] (2) Put the carapace granules into a crucible and cover them, place them in a muffle furnace, and put nitrogen into the muffle furnace and keep it for 15 minutes. The temperature of the muffle furnace was set at 10°C min -1 The heating rate was raised to 550°C and fired for 1h.

[0056] (3) Vacuum-dry the calcined products sequentially (145°C, dry for 7h), and use N 2 / CO 2 (80:20) purge, and sieve the biochar to obtain biochar particles with a particle size range of 180-250 μm.

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Abstract

The invention relates to the field of wastewater treatment, in particular to application of charcoal particles in acclimatization of anaerobic activated sludge, the anaerobic activated sludge and an acclimatization method and application of the anaerobic activated sludge. The method comprises the following steps: mixing bottom mud with charcoal particles, and introducing wastewater for domestication to obtain anaerobic activated sludge. Based on the basic principle of DIET (Direct Inter-specific Electron Transfer) between organic acid metabolic bacteria and methanogens, biochar is introduced into to-be-domesticated bottom mud, DIET for producing methane in anaerobic digestion is constructed and strengthened, electron transfer between hydrolysis acidification bacteria and methanogens is promoted, conversion from VFA to methane is realized, and acidification of reaction is effectively inhibited from the source.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to the application of biochar particles in anaerobic activated sludge domestication, anaerobic activated sludge and its domestication method and application. Background technique [0002] Electron transfer plays a key role in the material transformation of microorganisms, and in the traditional anaerobic digestion process, the interspecies electron transfer between acidogenic bacteria and methanogenic bacteria is mainly through H 2 Or other soluble small molecular substances as the medium, H 2 In the anaerobic environment, it is transferred in the form of diffusion, and the electron transfer speed is slow; in addition, it is greatly affected by the partial pressure of hydrogen in the anaerobic digestion system, and conditions such as fluctuations in the organic load of the substrate can easily cause excessive accumulation of VFAs (volatile fatty acids) , causing the acidificatio...

Claims

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Application Information

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IPC IPC(8): C02F3/28C12N1/36
CPCC02F3/28C12N1/36
Inventor 林海龙邓立康刘晓峰石飞虹范新龙刘新颖孙长征白金华柳树海刘劲松熊强
Owner GUOTOU BIO TECH INVESTMENT CO LTD
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