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Method and apparatus for nitrogen enrichment and removal by utilizing combined membrane biological reaction system

A biological reaction, combined membrane technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve problems such as poor nitrification effect, control membrane pollution, reduce reaction The effect of the number of rinses

Active Publication Date: 2013-11-20
北京北控工业环境科技有限公司
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Problems solved by technology

[0003] At present, in the process of domestic sewage treatment, the actual operating nitrification / denitrification process and its variant processes (such as oxidation ditch process, SBR process, BAF process, etc.), often add organic carbon sources (such as methanol, ethanol, etc.) or develop new carbon sources to increase the C / N value to achieve the denitrification effect; however, in the nitrification area, the nitrification effect is often poor due to the competition between nitrifying bacteria and heterooxygen microorganisms

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  • Method and apparatus for nitrogen enrichment and removal by utilizing combined membrane biological reaction system
  • Method and apparatus for nitrogen enrichment and removal by utilizing combined membrane biological reaction system
  • Method and apparatus for nitrogen enrichment and removal by utilizing combined membrane biological reaction system

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Embodiment Construction

[0042] Attached below figure 1 , 2 , 3, 4, 5, 6 and examples are described in detail to further understand the present invention.

[0043] A membrane module C 8 of the present invention ( image 3 , Figure 4 ), is made up of cation exchange membrane 28, ultrafiltration membrane or microfiltration membrane 27 and support plate 26 with diversion groove 30 and hole 31; cation exchange membrane 28 and ultrafiltration membrane or microfiltration membrane 27 are fixed on the support Both sides of the plate 26.

[0044] In order to achieve better experimental results, the cation exchange membrane 28 used in the present invention is a cation exchange membrane of the type CMS provided by Astom, Japan, and the ultrafiltration membrane 27 is a 0.1 μm pore size, membrane-pass membrane provided by Nanjing Ruijiete. The volume is 18.75-20.83 L / m 2 .h ultrafiltration membrane.

[0045] A membrane module A 22 of the present invention ( Figure 5 , Figure 6 ), is made up of anion exc...

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Abstract

The invention relates to a method and an apparatus for nitrogen enrichment and removal by utilizing a combined membrane biological reaction system, and belongs to the technical field of sewage treatment. The sewage treatment method is carried out according to the following process: enriching NH4<+> and separating organic matters in waste water by using a membrane module C; carrying out an aerobic nitration reaction; carrying out aerobic sludge settlement; enriching NO3<-> in the waste water by using a membrane module A; carrying out anoxic denitrification by combining the previously separated organic matters; and discharging water. In order to complete the above process, a special enforcement apparatus is provided. The method and apparatus have good organic matter and nitrogen removal function, so as to provide a treatment method for waste water with insufficient carbon source and high density of organic matters and high ammonia nitrogen; meanwhile, the method and apparatus can effectively reduce membrane pollution of the membrane module, and reduce backwashing of membrane and operation cost.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a nitrogen enrichment and removal method and device using a combined membrane biological reaction system. Background technique [0002] C / N is an important factor affecting the nitrification and denitrification process. Theoretically, the stoichiometric C / N required in the denitrification process is 2.86 (COD / NO3--N), but it is reported that the actual C / N required in the nitrification / denitrification system is much greater than 2.86, often at 7 Even over 11. On the other hand, although nitrifying bacteria utilize inorganic carbon sources as electron donors, nitrification is more stable at lower C / N due to the competition between nitrifying bacteria and heterotrophic microorganisms. Therefore, how to control the C / N value of the nitrification process and denitrification process in a suitable range, and optimize the function of the nitrification bacteria and...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 张岩刘焕光张中朱敏陈敬甘志明孙凤侠史扬谢杭冀
Owner 北京北控工业环境科技有限公司
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