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Dual-sludge denitrification dephosphorizing and denitrifying A/A-O device and method

A technology for denitrifying phosphorus removal and double sludge is applied in the field of biological sewage treatment to achieve the effects of low energy consumption and low system sludge yield.

Active Publication Date: 2013-10-23
上海立源生态工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to address the current AAO process problems, combining three key technologies of energy saving and consumption reduction, effective utilization of carbon sources and sludge reduction, to propose a sewage treatment device and method, through process adjustment to make denitrifying phosphorus accumulating bacteria into AAO The dominant bacterial genus of the unit realizes the separation of phosphorus accumulating bacteria and nitrifying bacteria, the separation of the sedimentation and mud storage functions of the secondary sedimentation tank, the separation of the nitrification and filtration functions of the biological aerated filter, and finally realizes the energy saving, stable and efficient denitrification of the combined system Phosphorus removal and sludge reduction

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  • Dual-sludge denitrification dephosphorizing and denitrifying A/A-O device and method

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Embodiment Construction

[0035] The best embodiment of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0036] like figure 1As shown, the A / A-O device of double sludge denitrification dephosphorization and denitrification described in the embodiment of the present invention is mainly composed of primary sedimentation tank 1, anaerobic-anoxic device 3, secondary sedimentation tank 7, intermediate pool 8, exposure Gas biofilter 10 and clean water tank 11 are sequentially connected to form; the anaerobic-anoxic device 3 is the AA device of the AAO treatment process, and the primary sedimentation tank 1 is anaerobically connected by the inlet pump 2 and the anaerobic-anoxic device 3. The oxygen zone 4 is connected, and the mud-water mixture flows through the anoxic zone 5 and the degassing zone 6 of the anaerobic-anoxic device 3 under gravity, and the degassing zone 6 of the anaerobic-anoxic device 3 is connected with the secondary sedimentat...

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Abstract

The invention discloses a dual-sludge denitrification dephosphorizing and denitrifying A / A-O device which mainly comprises a primary precipitation pool, an anaerobic-anoxic device, a secondary precipitation pool, a middle pool, a biological aerated filter and a clear water pool, wherein the primary precipitation pool is connected with an anaerobic zone of the anaerobic-anoxic device, a degassing zone of the anaerobic-anoxic device is connected with the secondary precipitation pool, and the secondary precipitation pool is connected with the anaerobic zone of the anaerobic-anoxic device through a sludge pump; the outflow water of the secondary precipitation pool is connected to the middle pool, the middle pool is connected with the biological aerated filter, and the biological aerated filter is connected with the clear water pool; and the clear water pool is connected with the anaerobic-anoxic device. By the process adjustment, denitrifying phosphorus accumulating bacteria becomes dominant bacteria of an AAO unit. The dual-sludge denitrification dephosphorizing and denitrifying A / A-O device realizes the separation of phosphorus accumulating bacteria and nitrobacteria, the separation of the precipitation function and the sludge storage function of the secondary precipitation pool, and the separation of the nitrification function and the filtering function of the biological aerated filter, thereby realizing energy conservation of a combined system, stability and efficiency in denitrification and dephosphorization, and sludge reduction.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and is particularly suitable for upgrading sewage treatment plants and building new sewage advanced treatment plants, and in particular relates to an A / A-O device and method for enhanced denitrification of sewage treatment. Background technique [0002] At present, more than 95% of sewage treatment plants in my country cannot meet the increasingly stringent Class A discharge standards. The key problem is that TN, TP and SS cannot meet the standards stably. Since the C / N of urban sewage in my country is generally low, and the VFA that can be used for anaerobic phosphorus release is even lower, a large amount of additional carbon sources need to be added in the process of biological nitrogen and phosphorus removal, and sewage plants have not adopted energy-saving and consumption-reducing technologies. The operating cost is generally high, and the operating cost per ton of water i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
Inventor 彭永臻张为堂刘青松王淑莹
Owner 上海立源生态工程有限公司
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