Device and method for strengthening denitrification and advanced nitrogen removal of internal carbon source by improved UCT sectional water feeding process

Abstract

The invention relates to a device and a method for strengthening denitrification and advanced nitrogen removal of an internal carbon source by an improved UCT sectional water feeding process, and belongs to the technical field of biological method wastewater treatment. According to the existing UCT sectional water feeding process, the nitrogen removal effect is poor under the condition of domestic sewage with extremely low carbon-to-nitrogen ratio; by an internal carbon source nitrogen removal technology, an external carbon source can be saved, and the reduction of sludge can be realized; according to the device and the method, the internal carbon source technology and the UCT sectional water feeding process are combined; an anoxic reaction zone is added behind the last section of aerobic zone; an advanced nitrogen removal process with internal carbon source denitrification and synchronous nitrification and denitrification effects is developed. By using the method and the device, the water quality of outlet water can be stabilized; the internal carbon source storage capacity of sludge is improved without the external carbon source; the synchronous nitrification and denitrification effect is strengthened; the total nitrogen removal rate is improved; the sludge discharging amount is reduced.

Description

Technical field: [0001] The invention relates to a device for strengthening the denitrification biological denitrification and dephosphorization of internal carbon sources by a UCT segmented water inlet process, and belongs to the technical field of biological sewage treatment. Under the condition of not adding new structures, by adding a post-anoxic reaction zone after the third aerobic reaction zone of the UCT segmented water reactor, and properly adjusting the process reference water, the carbon source storage of sludge is strengthened ability. Improve the ability to use the carbon source in the sludge for denitrification, and realize the simultaneous denitrification and denitrification technology with simultaneous nitrification and denitrification and sludge reduction. It is especially suitable for the upgrading and transformation of urban sewage treatment plants. Background technique [0002] The UCT segmented water inflow process combines the two processes of UCT and...

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Problems solved by technology

[0003] However, in recent years, due to the widespread installation of septic tanks and long drainage pipe networks in my country, the level of organic carbon sources in urban sewage is low, which cannot meet the needs of traditional biological nitrogen and phosphorus removal technologies for organic carbon sources.

The UCT staged water inflow process still needs to add external carbon sources to maintain the carbon-nitrogen ratio at 6-6.3 to meet the demand for organic carbon sources in biological nitrogen and phosphorus removal, which increases the burden of sewage treatment costs

In addition, the sludge age of the UCT staged water intake process is 15-18 days, and a large amount of excess sludge needs to be discharged every day. The sewage plant needs to invest 40%-60% of funds to treat the excess sludge, and most of the sludge is only piled up or filled after dehydration. buried, posing a serious threat to environmental safety

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