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Sludge drying sewage treatment system and method

A technology of sewage treatment system and sewage treatment method, applied in water/sludge/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. Water quality deterioration and other problems, to achieve the effects of low excess sludge production, improved system nitrification efficiency, and increased hydraulic retention time

Active Publication Date: 2014-12-10
HANLANLVDIAN SOLID WASTE TREATMENT (FOSHAN) CO LTD 2ND
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Problems solved by technology

However, for large and medium-sized cities, even if they are discharged according to the most stringent Class A standard, due to the large population and large amount of pollutant discharge in the city, the pollution load on the environment is very huge.
It is very likely that the sewage receiving water body will not be able to self-purify all pollutants, resulting in deterioration of the water quality of the receiving water body
It will greatly increase the cost of water treatment and affect the quality of treated water

Method used

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  • Sludge drying sewage treatment system and method

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Embodiment 1

[0058] 1) After the wastewater is settled in the sedimentation tank, the mud and water are separated. The sludge is sent to the sewage treatment system for treatment. The supernatant overflows into the nitrification and denitrification system. After sedimentation and separation, most of the suspended solids are removed, and the concentration of suspended solids is reduced. At the same time, most of the organic pollutants contained in the suspended solids are removed, which greatly reduces the organic load of subsequent treatment facilities.

[0059] 2) The supernatant overflows into the nitrification-denitrification system. Wastewater after carbon removal and nitrification, which is considered to contain a large amount of nitrate nitrogen and nitrite nitrogen after nitrification, is transported from the end of the nitrification tank to the nitrification mixture at the front of the denitrification tank through the mixed liquid return pump, In the denitrification pool, denitri...

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Abstract

The invention provides a sludge drying sewage treatment system comprising a typical biochemical treatment process and a membrane bioreactor (MBR). The biochemical treatment process is a front denitrification biological nitrogen removal process capable of generating a backflow, and a front-section anoxic tank and a rear-section aerobic tank are connected in series in the process. An immersed MBR technology is adopted by the MBR, a biological treatment technology and a membrane separation technology are organically combined to realize efficient biological treatment under a high-concentration active sewage treatment condition, and the floor area is remarkably reduced. Due to the physical separation effect of a membrane, high-quality effluent is obtained, and the effluent is kept to be completely up to the standard. The process is simple and clear in combination, short in flow process as well as stable and reliable in effect, and has strong pertinence for the water quality characteristic of sludge drying sewage.

Description

technical field [0001] The invention belongs to the field of sewage treatment, in particular to a sludge drying sewage treatment system and treatment method. [0002] Background technique [0003] In recent years, with the rapid growth of our country's economy, the process of industrialization and urbanization has continued to advance, and water pollution has become increasingly serious, causing water quality water shortages and original resource water shortages to overlap each other, and more and more affect people's normal production. and life. Among them, nitrogen pollution is a major hazard. The 2011 China Environmental Status Bulletin issued by the Ministry of Environmental Protection pointed out that the main pollution indicators of the seven major water systems except the Huaihe River system all contain ammonia nitrogen, and the problem of eutrophication in lakes (reservoirs) is still prominent. Nitrogen pollution in water has seriously threatened the ecological en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 潘炳新
Owner HANLANLVDIAN SOLID WASTE TREATMENT (FOSHAN) CO LTD 2ND
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