Domestic sewage treatment method by intermittent aeration contact oxidation process

Abstract

The invention discloses an intermittent aeration contact oxidation method for treating domestic sewage, and relates to an advanced treatment method for more effectively removing organic matter, nitrogen and phosphorus in domestic sewage at the same time. The facilities for realizing the method are composed of regulating ponds, anaerobic ponds, intermittent aeration contact oxidation ponds, sedimentation ponds and supporting equipment such as pipelines and water pumps connecting these ponds. The intermittent aeration contact oxidation tank adopts plug-flow design, with a special mud bucket at the end. The intermittent aeration contact oxidation tank adopts multi-point water inflow, and the aeration in the tank adopts the intermittent aeration method that can be adjusted flexibly. The tail end can selectively add chemicals, and the sludge in the special mud hopper is returned to the anaerobic tank and a small part to process. This method has excellent phosphorus and nitrogen removal functions, stable effluent quality, flexible and convenient operation, and can meet the reuse standard according to demand, which can reduce sludge production, project investment and sewage treatment costs.

Description

technical field [0001] The invention discloses an intermittent aeration contact oxidation method for treating domestic sewage, and relates to an advanced treatment method for more effectively removing organic matter, nitrogen and phosphorus in domestic sewage at the same time. Background technique [0002] At present, intermittent aerated biotechnology is generally used in SBR (Sequenced Batch Reactor). Because the SBR method has few structures, less investment, less land occupation, short aeration time, high efficiency, strong impact load resistance, flexible operation, strong adaptability, and can remove phosphorus and nitrogen, it has developed rapidly, and has developed a variety of Variant new process, such as ICEAS, CAST, CASS, DAT-IAT, MSBR, UNITANK and other processes. But at the same time, it also has many disadvantages: (1) High requirements for automatic control; (2) Due to the short drainage time during intermittent drainage Moreover, it is required not to stir ...

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Problems solved by technology

[0006] In view of the current intermittent aeration biotechnology SBR method's high automation control requirements, special drainage equipment, huge after-treatment equipment, and large decanting head loss, as well as the aforementioned "anaerobic and two-stage interactive intermittent aeration process treatment The phosphorus removal stability of "raw sewage" is not high, the system equipment is complicated, and there is also the organic substrate in the invention patent with the application number "01136287.1" and the invention title "air agitation, sludge reflux chemical flocculation sedimentation sewage treatment method" , The removal rate of ammonia nitrogen is not high, the effect of dosing is not enough, and the amount of sludge is still large. The patented process of the present invention adopts the gap aeration contact oxidation method, continuous water inflow and outflow, and the water inflow method adopts multi-point water inflow. You can take the advantages of the above several processes and get rid of the disadvantages

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