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Method for rapidly improving activity and abundance of anaerobic ammonium oxidation bacteria by adding redox active biochar

An anammox bacteria, anammox technology, applied in chemical instruments and methods, anaerobic digestion treatment, biological water/sewage treatment, etc. Total nitrogen removal rate and resistance to substrate fluctuations, good cost-benefit ratio, and the effect of cheap raw materials

Active Publication Date: 2022-02-08
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the anammox process in the prior art is difficult to operate stably, the present invention provides a kind of addition of redox activated biochar to rapidly improve the anammox Bacterial Activity and Abundance Methods

Method used

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  • Method for rapidly improving activity and abundance of anaerobic ammonium oxidation bacteria by adding redox active biochar
  • Method for rapidly improving activity and abundance of anaerobic ammonium oxidation bacteria by adding redox active biochar
  • Method for rapidly improving activity and abundance of anaerobic ammonium oxidation bacteria by adding redox active biochar

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Embodiment 1

[0039] Preparation of Redox Activated Biochar

[0040] The local green bamboo in Lianyungang was taken, and after the bamboo was ground into powder, it was first dried in an electric constant temperature drying oven at 105°C for 24 hours. Then carbonization is carried out in a multi-station vacuum tube furnace. The specific operation is as follows: first, let the temperature rise at a gradient of 5 °C / min until the temperature reaches 400 °C, and then close the tube furnace after maintaining this temperature for 2.5 hours. Nitrogen was continuously fed into the furnace to maintain an oxygen-deficient environment. The obtained biochar is sieved to obtain 20-40 μm biochar. Finally, the prepared biochar samples were washed three times with deionized water, adjusted to pH 7.50±0.03, then dried at 105° C. for 24 h, and stored in a desiccator to obtain redox activated biochar.

[0041] Wherein, the deionized water used for washing is standard commercial deionized water.

Embodiment 2

[0043] Study on the process of adding redox activated biochar to rapidly increase the activity and abundance of anammox bacteria

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Abstract

The invention relates to a method for rapidly improving the activity and abundance of anaerobic ammonium oxidation bacteria by adding redox active biochar, the redox active biochar is added into low-abundance anaerobic ammonium oxidation sludge, and the addition amount of the redox active biochar is 3-14g / L. By using the method for rapidly improving the activity and the abundance of the anaerobic ammonium oxidation bacteria by adding the redox active biochar, the abundance of the anaerobic ammonium oxidation bacteria can be improved while the denitrification activity of the anaerobic ammonium oxidation bacteria is improved, and the method has relatively good theoretical guidance significance on rapid starting of an anaerobic ammonium oxidation process.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a method for rapidly increasing the activity and abundance of anammox bacteria by adding redox activated biochar. Background technique [0002] As an emerging alternative to the traditional nitrification and denitrification process, anaerobic ammonium oxidation (Anammox) technology has many advantages such as saving carbon sources, no need for aeration, reducing greenhouse gas release and reducing excess sludge production. The energy saving and consumption reduction of treatment plants has brought dawn, and has become one of the research hotspots in the field of sewage denitrification treatment. [0003] However, the doubling time of anammox bacteria is long (2.1-12d), the cell yield is low, and it is difficult to start the anammox reactor. In addition, anammox bacteria are sensitive to environmental conditions such as temperature, dissolved oxygen, and infl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34
CPCC02F3/28C02F3/34
Inventor 王亚宜王伟刚刘清华王天蓓
Owner TONGJI UNIV