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Device and method for sectional water inlet A2/O process intensified biological nitrogen and phosphorus removal

A segmented water intake and biological denitrification technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc.

Active Publication Date: 2017-06-13
BEIJING UNIV OF TECH
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Problems solved by technology

Although anaerobic ammonium oxidation has been successfully applied to high-ammonia-nitrogen wastewater, there is still a lot of room for the application of anaerobic ammonium oxidation technology in urban sewage, and its successful application in sewage treatment plants will be of great significance for energy saving and consumption reduction

Method used

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  • Device and method for sectional water inlet A2/O process intensified biological nitrogen and phosphorus removal

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Embodiment approach

[0017] 1) The raw water enters the segmented water inlet A from the raw water tank (1) through the water inlet pump (2) 2 The / O pool (6) enters the anaerobic zone (8) and the second anoxic zone (11) respectively through the main water inlet pipe (3) and the control gate valve (4) (5). 60% and 40% respectively; the nitrifying liquid in the aerobic zone (12) is returned to the first anoxic zone (9) through the backflow pump (21) to carry out short-range denitrification anammox denitrification, from the secondary sedimentation tank ( The sludge in 14) is returned to the anaerobic zone (8) through the return pump (22), and the denitrifying bacteria use the carbon source in the raw water for denitrification, and at the same time, the phosphorus accumulating bacteria use the carbon source provided by the raw water in the anaerobic zone (8). The volatile fatty acids synthesize internal carbon sources while releasing phosphorus.

[0018] 2) The mixed solution enters the first anoxic...

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Abstract

The invention discloses a device and a method for sectional water inlet A2 / O process intensified biological nitrogen and phosphorus removal, and belongs to the field of sewage treatment. The device consists of a raw water tank (1), a sectional water inlet A2 / O tank (6) and a secondary sedimentation tank (14) which are connected in sequence. The method comprises the following steps: by feeding packing with anaerobic ammonium oxidation bacteria into anoxic zones and controlling a raw water C / N ratio and average hydraulic retention time of the anoxic zones, performing phosphorus dilution of an anaerobic zone (8), performing phosphorus absorption of an aerobic zone (10), and performing denitrification through partial denitrification anaerobic ammonia oxidation reaction on anaerobic ammonium oxidation bacteria on the packing of a first anoxic zone (9) by using nitrate nitrogen in recycled nitrification liquor and ammonia nitrogen in fed water; controlling dissolved oxygen of a first aerobic zone (10) to achieve semi-partial nitrification, providing a substrate nitrous to denitrification and anaerobic ammonia oxidation with nitrous as a substrate in a second anoxic zone (11), and performing whole-process nitration reaction and aerobic phosphorus accumulation reaction in an aerobic zone (12), thereby achieving nitrogen and phosphorus removal of municipal sewage, wherein the ammonia nitrogen used in the device and the method is provided from residual semi-partial nitrification ammonia nitrogen and second-stage fed water.

Description

technical field [0001] The invention relates to a segmented water inlet A 2 The / O process strengthens the biological denitrification and phosphorus removal method, which belongs to the field of sewage treatment and is suitable for deep denitrification of urban sewage, which is beneficial to energy saving and consumption reduction of water plants. Background technique [0002] Due to the use of septic tank technology, the C / N ratio of urban sewage is relatively low, and the carbon source for anaerobic phosphorus release and denitrification is insufficient. Most urban sewage treatment plants cannot meet the Pollutant Discharge Standards for Urban Sewage Treatment Plants "(GB18918-2002) Class A standard, the key is that the effluent TN cannot meet the standard stably. [0003] As a new biological denitrification technology, anaerobic ammonium oxidation technology is attracting more and more attention. Although anaerobic ammonium oxidation has been successfully applied to hig...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/302
Inventor 彭永臻高锐涛李健伟李夕耀
Owner BEIJING UNIV OF TECH
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