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A device and method for urban sewage treatment based on the inhibition of free nitrous acid to quickly realize short-range nitrification

A short-range nitrification and urban domestic sewage technology, applied in the field of sewage treatment, can solve the problems of complex implementation of control strategies and uneasy operation, and achieve good precipitation effect, simple treatment method, and low economic input cost

Active Publication Date: 2018-03-16
BEIJING UNIV OF TECH
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Problems solved by technology

Among them, the SHARON process needs to be operated at 35°C, and the treatment object is mainly high-ammonia nitrogen wastewater; the implementation of the control strategy is more complicated, and the operation is not simple

Method used

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  • A device and method for urban sewage treatment based on the inhibition of free nitrous acid to quickly realize short-range nitrification
  • A device and method for urban sewage treatment based on the inhibition of free nitrous acid to quickly realize short-range nitrification
  • A device and method for urban sewage treatment based on the inhibition of free nitrous acid to quickly realize short-range nitrification

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Embodiment Construction

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and technical solutions.

[0035] refer to figure 1 shown as a through A 2 / O combined with the FNA treatment unit to realize the schematic diagram of the low-carbon source urban sewage short-range nitrification device, wherein the water tank (2) is provided with a water inlet pipe (1) and an emptying pipe (3), A 2 The anaerobic tank and anoxic tank of / O are stirred and mixed evenly by the stirrer (5); there is an aeration system in the aerobic tank; ); FNA processing unit (19) is a CSTR reactor, is provided with stirring device (5) simultaneously.

[0036] The main reactor is traditional A 2 The / O process consists of anaerobic tank, anoxic tank and aerobic tank, the volume ratio is 2:3:4, and the total effective volume of the reactor is 54L.

[0037] refer to figure 1 The test device shown, according to the following steps to realize the short-range nitr...

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Abstract

The invention relates to an urban sewage treatment device and method for quick realization of partial nitrification based on free nitrous acid inhibition and belongs to the field of sewage treatment. The method comprises the steps that an FNA treatment unit is arranged in parallel in the sludge backflow process of a traditional A2 / O technology secondary sedimentation tank, the growth activity of nitrite oxidizing bacteria (NOB) is partially inhibited by using the selective bacterium inhibiting effect of FNA on ammonia oxidizing bacteria (AOB) and NOB under the anoxic condition, sludge then flows back to a main flow A2 / O reactor, NOB in active sludge are gradually elutriated under the effect of sludge age control, and thus partial nitrification of the urban sewage is quickly achieved in the main flow A2 / O reactor. The method is simple, heating or real-time control is not needed, and a good sedimentation effect is achieved; in addition, phosphate removal and nitrogen removal are carried out simultaneously, the phosphate removal effect is not affected by addition of the FNA treatment unit, the efficient and simultaneous phosphate removal and nitrogen removal effect of the low-carbon source urban sewage is achieved, and the urban sewage treatment device and method for quick realization of partial nitrification based on free nitrous acid inhibition are suitable for upgrading transformation of existing urban sewage plants.

Description

technical field [0001] The invention relates to a method for realizing short-range nitrification of urban sewage by using free nitrous acid (FNA) to treat activated sludge, and belongs to the field of sewage treatment. in the traditional A 2 A FNA treatment unit is installed in parallel in the sludge return process of the secondary sedimentation tank of the / O process, and then returns to the mainstream A 2 / O reactor, in main stream A 2 The short-range nitrification of urban sewage can be quickly realized in the / O reactor, which can realize the effect of efficient and simultaneous denitrification and phosphorus removal of low-carbon source urban sewage, and is suitable for the upgrading and transformation of existing urban sewage plants. Background technique [0002] The traditional nitrification is completed by ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB), and the denitrification process is only completed by denitrifying bacteria, but there is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/303C02F3/308C02F2203/004
Inventor 彭永臻马琳娜王淑莹
Owner BEIJING UNIV OF TECH
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