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Method for reinforcing adsorption-biodegradation (AB) denitrification technology by use of heterotrophic nitrification-aerobic denitrification bacteria

A technology of aerobic denitrification and heterotrophic nitrification, which is applied in the field of biologically enhanced denitrification by AB process, can solve the problems of not being able to meet the discharge requirements and lack of efficient denitrification, so as to increase the daily treatment capacity, ensure the target of denitrification, and reduce sludge The effect of performance improvement

Inactive Publication Date: 2011-11-16
PEKING UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] But there are many deficiencies in the AB process: (1) lack of environment for efficient denitrification
Most of the AB process sewage treatment plants that have been built can no longer meet the new discharge requirements, which has become a technical problem that needs to be solved urgently

Method used

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  • Method for reinforcing adsorption-biodegradation (AB) denitrification technology by use of heterotrophic nitrification-aerobic denitrification bacteria
  • Method for reinforcing adsorption-biodegradation (AB) denitrification technology by use of heterotrophic nitrification-aerobic denitrification bacteria
  • Method for reinforcing adsorption-biodegradation (AB) denitrification technology by use of heterotrophic nitrification-aerobic denitrification bacteria

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Embodiment 1

[0031] In this embodiment, the method of the present invention and the ordinary AB sewage treatment method are used as a comparative experiment. Reaction device 1 is an AB process reaction device enhanced with PCN series microorganisms, and reaction device 2 is a common AB process reaction device.

[0032] All reactors of AB process are made of organic glass, see image 3 As shown, the designed treatment water volume is 50L / d, the effective volume of the aeration tank in section A is 0.8L, and the designed hydraulic retention time is 0.5h; the aeration tank in section B is designed according to the hydraulic retention time of 3.3h, and the corresponding effective volume is 7L ; Section A sedimentation tank and B section sedimentation tank have the same structure, both of which are vertical flow sedimentation tanks. The effective volume of the A section sedimentation tank is 3.5L and the residence time is 1.7h. The design hydraulic retention time of the sedimentation tank in sect...

Embodiment 2

[0043] Combine image 3 The present invention is further described with Example 2. The aeration tanks of section A and section B of the reaction device 1 are both loaded with activated sludge. Dissolved oxygen (DO) was monitored by a dissolved oxygen meter, and the DO value was maintained at 1.5~2.5g / L in the aeration tank of section A and 2.5~3.5g / L in the aeration tank of section B. The remaining operating conditions were the same as those in Example 1. The same. The A section and B section of the process are operated independently by adjusting the water pipe. The water volume of section A is 6.5L / d, the residence time is 3h, the water volume of section B is 50L / d, and the residence time is 3.3h. The reaction device 2 used the activated sludge in the reaction device 1 in Example 1. Both reactors 1 and 2 continuously process simulated domestic sewage with a COD / N of 6 until a stable removal rate of COD, ammonia nitrogen and total nitrogen is obtained. Then according to the...

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Abstract

The invention discloses a method for reinforcing an adsorption-biodegradation (AB) denitrification technology by use of heterotrophic nitrification-aerobic denitrification bacteria and belongs to the technical field of water treatment. The method comprises the following specific steps: when the COD (chemical oxygen demand) / N of sewage is more than 8, the sewage passes through a section A and a section B in turn, feeding the effluent of the section A into the section B and inoculating heterotrophic nitrification-aerobic denitrification bacteria into the activated sludge of the section B; and when the COD / N of the sewage is no more than 8, feeding the sewage into the section A and the section B respectively, independently operating the section A and the section B and inoculating the heterotrophic nitrification-aerobic denitrification bacteria into the activated sludge of the section A and the activated sludge of the section B. By adopting the method, the functions of carbon removal and denitrification are realized under the combined action of the section A and the section B in an AB process system and the denitrification effect and efficiency of sewage treatment can be increased.

Description

Technical field [0001] The invention belongs to the technical field of water treatment, and relates to an AB process bio-enhanced denitrification method. Background technique [0002] When the nitrogen carried by urban sewage is discharged into water bodies, it will cause eutrophication of lakes, rivers and marine environments, causing frequent occurrence of large areas of red tides or blooms. Wastewater denitrification is a difficult problem in the treatment of environmental pollution. Biological denitrification is currently recognized as the most economical and effective method in wastewater denitrification treatment. AB sewage treatment process (biological adsorption oxidation method) is one of the most widely used sewage treatment processes in old sewage treatment plants in my country. Since the 1990s, my country has built Qingdao Haibohe Sewage Treatment Plant, Tai'an Sewage Treatment Plant, Zibo Sewage Treatment Plant, Urumqi Hedong Sewage Treatment Plant, Tengzhou Sewage ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/12
CPCY02W10/10
Inventor 倪晋仁瞿利建陈倩
Owner PEKING UNIV
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