Integrated autotrophic synchronous biological denitrification granulation device

Abstract

The invention discloses an integrated autotrophic synchronous biological denitrification granulation device which comprises an outer barrel arranged on a support.An inner barrel is arranged inside the outer barrel, both a water incoming pipe and an air incoming pipe penetrate the undersurface to extend into the inner barrel, the end of the air incoming pipe in the inner barrel is connected with an aeration head, the top of the outer barrel is connected with a sludge backflow slope, a sedimentation barrel is connected above the sludge backflow slope, an overflow weir is arranged at the upper edge of the sedimentation barrel, a water collection tank is arranged outside the sedimentation barrel, an isolation barrel is arranged at the top of the inner barrel in a sleeved manner, a sludge backflow gap is formed between the isolation barrel and the sludge backflow slope, the top of the isolation barrel is higher than the sedimentation barrel, a second gas-water separation annular baffle is connected on the inner wall of the sedimentation barrel, and a first gas-water separation annular baffle is arranged at a position above the second gas-water separation annular baffle and on the outer wall of the isolation barrel.A circulating device does not need to be added externally, so that energy conservation is realized; granular sludge can be cultured under action of self-circulation, and setting performance is good.

Description

technical field [0001] The invention belongs to the technical field of denitrification of wastewater, and in particular relates to an integrated autotrophic synchronous biological denitrification granulation device. Background technique [0002] The most widely used waste water nitrogen removal technology is wastewater biological nitrogen removal technology. The traditional wastewater biological nitrogen removal technology is nitrification-denitrification process, that is, ammonia nitrogen is oxidized to nitrate nitrogen (NH 4 + →NO 3 - ) and then in the denitrification section the nitrate nitrogen is converted into nitrogen emission (NO 3 - →N 2 ). The traditional process requires a large amount of oxygen consumption and energy consumption, and additional carbon sources, and the output of residual sludge is high and the efficiency is low. In order to solve these problems, the researchers developed a short-cut nitrification-ANAMMOX denitrification process, which uses ...

AI Technical Summary

Problems solved by technology

The disadvantages of this process are: first, the process efficiency is low, 1.8kg-N / m3 / day

Second, because nitrite, nitrate and organic matter still remain in the effluent, it is easy to produce gas and bring up the sludge, making it difficult to settle

Third, the anaerobic ammonium oxidation granular sludge is used as the inoculated sludge, which has a long doubling time (11 days) and is difficult to obtain

The disadvantages of this patent are: first, the aerobic and anaerobic stages form a physical partition, which is prone to nitrite inhibition. Since the aerobic stage is an acidification process and the anaerobic stage is a simplified process, anaerobic bacteria need ammonia nitrogen: nitrite Nitrogen is close to about 1:1, so there are still problems that pH and ammonia nitrogen / nitrite nitrogen ratio are difficult to control, and it is difficult to form high-efficiency

Second, it is necessary to add a circulation pump to realize the circulation of waste water and increase energy consumption

Third, using anammox granular sludge as the inoculum, the inoculum is difficult to obtain

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