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a liquid-based 2 oConcentration monitoring of sewage biological denitrification process

A sewage biological and concentration technology, applied in the field of environmental engineering, can solve problems such as real-time control not mentioned, achieve the effect of optimizing sewage denitrification efficiency, assisting process operating parameters, and broadening the scope of application

Active Publication Date: 2020-10-09
CHANGAN UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0004] At present, regarding the N 2 There are many research reports on the generation of O, but none of them mentioned N 2 O can be used as a control parameter to realize real-time control of A / O / A-SBR or A / O / A-SBBR process nitrosation process and denitrification process.

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  • a liquid-based <sub>2</sub> oConcentration monitoring of sewage biological denitrification process

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Embodiment Construction

[0016] see figure 1 : The present invention is based on liquid phase N 2 The sewage biological denitrification process with O concentration monitoring is to monitor the liquid phase N in the ammonia oxidation process online. 2 Concentration curve of O and liquid phase N in the denitrification process 2 The concentration curve of O can be used to determine the time point when the nitrosation reaction is completed and the time point when the denitrification reaction is completed according to the characteristics of the curve. Specifically: in the process of aerobic ammonium oxidation, when N 2 When the concentration of O rises first and then drops until it reaches the lowest point when it starts to rise (at the same time with the help of the sudden rise of DO concentration), this point is used as the judgment point for the completion of nitrosation; in the process of anoxic denitrification, when N 2 When the concentration of O drops to the lowest point near the beginning of t...

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Abstract

The invention discloses a sewage biological nitrogen removal process based on liquid phase N2O concentration monitoring. A method comprises a step of monitoring a concentration curve of liquid phase N2O in an ammoxidation process and a concentration curve of the liquid phase N2O in a denitrification process on line, and judging time for completing nitrosation reaction and time for completing denitrification reaction according to features of the curves. According to the process disclosed by the invention, by taking the N2O as a nitrosation control parameter and a denitrification control parameter, a new high-efficient nitrogen removal sewage treatment technology is realized; compared with conventional A / O / A-SBR and A / O / A-SBBR processes, the process disclosed by the invention has the advantages that a nitrosation reaction progress and a denitrification reaction progress can be observed in a clearer and indirect way in real time, so that high-efficient nitrogen removal on sewage can be realized.

Description

technical field [0001] The invention belongs to the technical field of environmental engineering and relates to sewage treatment, in particular to a 2 O concentration online detector monitors N 2 O change to judge the sewage biological denitrification process of A / O / A-SBR and A / O / A-SBBR processes of nitritation process and denitrification process. Background technique [0002] The operation and management of traditional sewage treatment plants are operated according to the treatment process, operation mode (continuous flow or intermittent flow) and reaction time (HRT and SRT) designed by the engineering design unit. Although the design result is based on the accurate calculation of the designed water volume, design sludge load or volume load, in an ideal situation, the actual effluent quality of the sewage plant should be able to achieve the design target effluent quality (such as sewage treatment plant pollutants Level 1 A standard in the emission standard). [0003] How...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/302C02F2209/34
Inventor 赵剑强丁晓倩陈莹杨文娟胡博李晓玲吴沛刘珺
Owner CHANGAN UNIV