System and method for treating urban sewage

A technology for treatment system and urban sewage, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc. and other problems, to achieve the effect of being conducive to biological coagulation, easy operation, and strong adaptability to water quality and quantity.

Inactive Publication Date: 2010-03-03
王强
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Problems solved by technology

The SBR method was developed as early as the beginning of the 20th century. This method integrates water intake, aeration, sedimentation, and water discharge in one pool. It usually consists of three o

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  • System and method for treating urban sewage

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Embodiment Construction

[0008] The present invention adopts the process of anaerobic pond+oxidation ditch to treat urban sewage, and the influent water quality is shown in Table 1, and its specific steps are:

[0009] (1) Wastewater enters the medium and fine grids first, the medium grid adopts mechanical slag removal, the grid gap is 20mm, the fine grid grid gap is 6mm, the flow rate of sewage passing through the grid is 0.8m / s, the installation angle of the grid is 70°;

[0010] (2) The effluent enters the aeration grit chamber to remove inorganic particles. By adjusting the aeration rate, the rotation velocity of the sewage can be controlled to make it swirl, generate centrifugal force, and remove mud and sand. The removed mud and sand are relatively clean and easy to handle. , and it is less affected by flow changes, and the sand removal rate is stable. At the same time, it also plays a role in pre-aeration of sewage, and the horizontal flow rate is 0.1m / s;

[0011] (3) The effluent enters the a...

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Abstract

The invention belongs to the technical field of environmental protection, and in particular relates to a system and a method for treating urban sewage. The invention provides the system and the methodfor treating the urban sewage, which are simple in operation, good in treatment effect, simple in process and strong in adaptation to water quality and water amount and of which the effluent meets the discharge standard. The technical scheme is as follows: by adopting a treatment process of an anaerobic tank and an oxidation ditch, big and small suspended matters are substantially removed after the sewage passes through a middle bar screen and a fine bar screen; the effluent enters an aeration desilting basin so that inorganic particles with a big grain size, such as sands, gravels and coal slag, are precipitated; the effluent enters the anaerobic tank and the oxidation ditch, wherein in the oxidation ditch, the mixed liquid of the wastewater and activated sludge continuously and circularly flows under the action of an externally added driving force, organic substances are degraded under the functions of microorganisms, and the nitrogen and phosphor are well removed; the effluent enters a secondary settling tank; after the sludge and water in the effluent are separated, the sterilized and filtered effluent can be discharged after reaching the standard; and the left sludge is condensed, dehydrated and carried away.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an urban sewage treatment system and method. Background technique [0002] With the acceleration of industrialization, environmental problems have become increasingly prominent, especially the deterioration of urban water environment, which has exacerbated the shortage of water resources. Insufficient water sources in many areas and cities have affected the physical and mental health of the people, and have become the key to sustainable urban development. serious constraints. Compared with foreign developed countries, my country's urban sewage treatment started relatively late. In the past 200 years, urban sewage treatment has developed from the original natural treatment and simple primary treatment to the use of various advanced technologies, advanced treatment of sewage, and reuse. Urban sewage treatment methods include AB method, SBR method, A ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/52
Inventor 王强
Owner 王强
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