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 of AB process, can solve the problems of lack of efficient denitrification and failure to meet discharge requirements, achieve the goal of guaranteed denitrification, increase daily treatment capacity, sludge The effect of performance improvement

Inactive Publication Date: 2012-10-10
PEKING UNIV
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  • 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 common AB sewage treatment method are compared with each other. Reaction device 1 is an AB process reaction device that uses PCN series microorganism enhancement, and reaction device 2 is a reaction device of ordinary AB process.

[0032] All reactors of the AB process are made of plexiglass, see image 3 As shown, the design 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 ; The sedimentation tank of section A and the sedimentation tank of section B have the same structure, both are vertical flow sedimentation tanks, the effective volume of the sedimentation tank of section A is 3.5L, and the residence time is 1.7h. The design hydraulic retention time of the B section sed...

Embodiment 2

[0043] combine image 3 The present invention is further described with embodiment 2. The aeration tanks of section A and section B of the reaction device 1 are loaded with activated sludge. Dissolved oxygen (DO) is monitored by a dissolved oxygen measuring instrument, and the DO value maintained in the A section aeration tank is 1.5~2.5g / L, and the B section aeration tank is 2.5~3.5g / L, and all the other operating conditions are the same as in Example 1 in the same. The A section and B section of the process are operated independently by adjusting the water pipe. The water volume of the A section is 6.5L / d, and the residence time is 3h. The water volume of the B section is 50L / d, and the residence time is 3.3h. The reaction device 2 is equipped with activated sludge according to the reaction device 1 in the embodiment 1. Reactors 1 and 2 both continuously treat simulated domestic sewage with a COD / N ratio of 6 until a stable removal rate of COD, ammonia nitrogen and total ...

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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 a method for biologically enhanced denitrification by AB process. Background technique [0002] Nitrogen carried by urban sewage will cause eutrophication of lakes, rivers and marine environments after being discharged into water bodies, resulting in large-scale red tides or frequent algal blooms. Wastewater denitrification is a difficult problem in environmental pollution control at present, and biological denitrification is currently recognized as the most economical and effective means of wastewater denitrification treatment. The AB sewage treatment process (bioadsorption oxidation method) is one of the most widely used sewage treatment processes in my country's old sewage treatment plants. Since the 1990s, Qingdao Haibo River Sewage Treatment Plant, Taian Sewage Treatment Plant, Zibo Sewage Treatment Plant, Urumqi Hedong Sewage Treatment Plant, Tengzhou Sewage Treatment...

Claims

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Application Information

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Patent Type & Authority Patents(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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