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City sewage treating process and system

A technology for urban sewage and treatment methods, which is applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. Simple, short hydraulic retention time, saving construction investment

Inactive Publication Date: 2005-12-14
高斌 +2
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Problems solved by technology

Moreover, sewage treatment plants need to occupy a large amount of arable land, which also confuses governments at all levels, especially the land in large and medium-sized cities is very expensive. It is obviously not suitable for my country's national conditions to use the same low-load treatment method as in developed countries.
Therefore, many sewage treatment plants can afford to be built but cannot be operated.

Method used

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  • City sewage treating process and system

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Embodiment Construction

[0032] The technical solution and other beneficial effects of the present invention will be apparent through the detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings.

[0033] The embodiment of the urban sewage treatment system shown in the accompanying drawings includes a coarse grid 1, a middle grid 2, a water collection pump room 3, a fine grid 15, a mixed reaction grit chamber 4, an inclined tube sedimentation tank 5, and an air flotation removal tank. Oil pond 6, nitrification pond 7, denitrification pond 8, sand filter pond 9 and ultraviolet ray disinfection pond 10, they are connected successively through sewage pipeline, on the pipeline before sewage enters water collecting pump room 3 and sewage enters fine grid 15, Each is provided with a metering pump 11 and a metering pump 12 for adding flocculant and coagulant aid respectively.

[0034]Among them, the air flotation degreasing tank 6 is provided wi...

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Abstract

The present invention discloses city sewage treating process and system. The city sewage treating process includes interception with coarse and middle grating to eliminate large suspended matter and the following steps: throwing flocculent before sewage flows into collecting pump house; throwing coagulant aid after sewage flows out of collecting pump house; treating in mixing and reacting silt basin; solid-liquid separation in settling pond; treating in nitrifying pond and denitrifying pond and filtering in sand filter. The process can treat mixed city sewage of industry waste water and domestic sewage and with BOD / COD in 0.15-0.3, can eliminate phosphate and nitrogen simultaneously. The present invention has short retention period, short technological process, small covered area and convenient management.

Description

technical field [0001] The invention relates to a method and system for treating urban sewage, in particular to a method and system for treating sewage with low biochemical coefficient and short hydraulic retention time. Background technique [0002] my country is already a resource-deficient country in the world, and the available water resources per capita are less than 1 / 4 of the world's average, and the distribution is extremely uneven. With the rapid economic development in recent decades, most cities in my country are short of water. The problem is becoming more and more prominent, and water shortage has become a bottleneck problem that restricts the sustainable development of many cities' economies. At the same time, because the development of water pollution control methods and treatment technologies, and the investment in treatment facilities are relatively lagging behind, most urban sewage is directly discharged without any treatment, and nearly 85% of the discharge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 高斌李利军高腾霄
Owner 高斌
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