Process method of MBBR (Moving Bed Biofilm Reactor) for treating urban sewage

A technology of urban sewage and process method, applied in the field of sewage treatment, can solve the problems of phosphorus removal and nitrification interference, low denitrification efficiency, affecting phosphorus removal effect, etc., so as to improve mass transfer efficiency, improve utilization rate, and save aeration. Effect

Inactive Publication Date: 2015-12-09
TONGJI UNIV
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Problems solved by technology

[0003] Due to the continuous improvement of people's living standards and the gradual increase in the amount of sewage, the current urban domestic sewage gradually shows the nature of low C/N, resulting in a relative shortage of organic carbon sources in the denitrification process and low denitrification efficiency, which contradicts the TN compliance of the effluent; On the other hand, the traditional single-sludge biological nitrogen and phosphorus removal process (such as A 2 O) Phosphorus accumulating bacteria, denitrifying bacteria, nitrifying bacteria, etc. coexist in the same activated sludge system, there must be a dispute between nitrifying bacteria and phosphorus accumulating bacteria at different sludge ages (SRT), so that phosphorus removal and nitrification interfere with each other, and because Nitrifying bacteria are autotrop

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  • Process method of MBBR (Moving Bed Biofilm Reactor) for treating urban sewage

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Embodiment 1

[0031] Embodiment 1: a kind of processing method of the MBBR processing method of urban sewage of the present invention, comprises the following steps:

[0032] An MBBR process method for treating urban sewage, the steps of which are as follows: urban sewage treatment undergoes primary treatment to remove suspended solids and part of organic matter in the sewage, and then enters the MBBR treatment system through an inlet pool;

[0033] The urban sewage treated in step 1 first enters the anaerobic zone of the MBBR system, and the sludge in this zone reaches a completely mixed state under the action of stirring; the HRT of the anaerobic zone is 2.5-3h, and the DO is maintained at 0-0.2mg / L ; In the anaerobic zone, denitrifying phosphorus-accumulating bacteria are mainly used for anaerobic phosphorus release, and some organic matter is adsorbed and removed by activated sludge;

[0034] The sewage treated in the anaerobic zone enters the aerobic zone, and the sewage is nitrified u...

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Abstract

The invention discloses a process method of an MBBR (Moving Bed Biofilm Reactor) for treating urban sewage. The process method comprises the steps that suspended matters and part of organic matters in the urban sewage which is subjected to primary treatment are removed, then the urban sewage enters into an anaerobic zone, an aerobic zone and an anoxic zone of the MBBR in sequence by an intake sump, and enters into a secondary sedimentation tank through the anoxic zone; carriers are suspended in the anaerobic zone of the MBBR, and the surfaces of the carriers are attached with nitrobacteria, which is conductive to growth of the nitrobacteria with long sludge age, the organic matters can be subjected to degradation treatment by activated sludge in all zones, and phosphorus in the sewage is processed by the activated sludge, so as to realize simultaneous nitrogen and phosphorus removal. The process method disclosed by the invention has the characteristics that the effect of nitrogen and phosphorus removal is good and the utilization rate of organic matters is high, meanwhile, the sludge production is low, the nitrification liquid reflux does not exist, the operation cost is reduced, and the process method is particularly suitable for treating domestic sewage with low ratio of C/N.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to an MBBR process method for treating urban sewage. Background technique [0002] Under the new situation where the pressure on the water environment is becoming increasingly prominent, the efficient and stable operation of sewage biological treatment technology can enable the reuse of sewage resources, and can effectively solve the current situation of water resource shortage, water environment pollution, and water ecological destruction that our country is currently facing. , to achieve a healthy and sustainable cycle of water. [0003] Due to the continuous improvement of people's living standards and the gradual increase in the amount of sewage, the current urban domestic sewage gradually shows the nature of low C / N, resulting in a relative shortage of organic carbon sources in the denitrification process and low denitrification efficiency, which contradicts the TN com...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 董滨何群彪孟金凤沈丹妮谭杰刘明昊冯青青
Owner TONGJI UNIV
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