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AO/SBR system and process for enhanced nitrogen removal

A denitrification and process technology, which is applied in the AO/SBR system and process field of enhanced denitrification treatment, can solve the problems of difficult to guarantee the removal effect of total nitrogen and high idle rate, and achieve remarkable denitrification effect, less sludge discharge, and easy operation simple effect

Active Publication Date: 2014-05-28
BEIJING SHOUGANG INT ENG TECH
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  • Abstract
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Problems solved by technology

However, the idle rate of SBR process equipment is high, and the synchronous denitrification process is affected by multiple factors such as dissolved oxygen, carbon source, and the size of biological flocs, which makes it difficult to guarantee the removal effect of total nitrogen.

Method used

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  • AO/SBR system and process for enhanced nitrogen removal
  • AO/SBR system and process for enhanced nitrogen removal

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Embodiment Construction

[0028] Process device of the present invention such as figure 2 Shown: including the main reaction zone, i.e. anoxic zone 1 and aerobic zone 2, inlet valve 3 for introducing raw sewage into anoxic zone 1, submersible mixer 4 in anoxic zone 1, water collection channel 5, and diversion pipe 6. Anoxic filling area 7, grid 8, aerobic filling area in aerobic area 2 9, sludge return pump (frequency conversion) for returning mixed sludge in aerobic area 2 to anoxic area 1 10. Sludge pump 11 for discharging excess sludge in aerobic zone 2, aeration pipe 12 at the bottom of aerobic zone 2, electric valve (pneumatic) 13 connected to aeration pipe 12, air compressor 14, decanting water Device 15, drain valve 16, automatic control system 17, dissolved oxygen detector 18, sludge concentration detector 19. Connected with the automatic control system 17 are water inlet pump 3, submersible mixer 4, sludge return pump 10, sludge discharge pump 11, electric valve 13, air compressor 14, decant...

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Abstract

The invention provides an AO / SBR system and process for enhanced nitrogen removal, belonging to the technical field of simultaneous phosphorus and nitrogen removal by using SBR and derivative processes thereof. The system comprises an anoxic zone in which a constant water level is set, a submersible mixer is additionally arranged and an anoxic filling material is added, an aerobic zone in which an aerobic filling material zone is arranged and an aerobic filling material is added, a reinforced sludge backflow system and an improved automatic control system, The process has the advantages of good anti-load capacity, simple operation, a high degree of automation, discharge of a small amount of sludge, simultaneous nitration, denitrification and nitrogen removal effects, low possibility of sludge bulking and the like, is applicable to upgrading and rebuilding of conventional sewage treatment plants, does not increase floor space of a project and can be conveniently popularized and applied in building, upgrading and rebuilding of small and medium sized sewage treatment plants in China.

Description

technical field [0001] The invention belongs to the technical field of SBR (sequenced batch activated sludge process) and its modified process for synchronous denitrification and phosphorus removal, in particular to an AO / SBR system and process (anaerobic / aerobic / sequential batch type) for enhanced denitrification treatment activated sludge process). Background technique [0002] With the intensification of eutrophication in lakes and reservoirs in my country, various provinces and cities have successively issued local sewage discharge standards, which put forward higher requirements for the tail water discharge standards of established and newly built urban sewage treatment plants. However, the emission concentration limit of each pollutant in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) issued by the State Environmental Protection Administration has exceeded the critical concentration of the corresponding indicators of water eutrophi...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F101/16
Inventor 张岩岗安东子柳倩倩张玥寇彦德
Owner BEIJING SHOUGANG INT ENG TECH
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