Rapid startup device and method for normal-temperature shortcut nitrification of urban sewage with low C/N ratio

Abstract

The invention discloses a rapid startup device and method for normal-temperature shortcut nitrification of urban sewage with low C/N ratio. The device comprises an SBR (sequencing batch reactor), wherein an aeration device, a DO sensor, a stirring device and a pH sensor are arranged in the SBR; the SBR is connected with a water inlet pump and a water outlet pump through pipes; a sludge discharge pipe is arranged at the bottom of the SBR. Meanwhile, the rapid startup method for normal-temperature shortcut nitrification of the urban sewage with the low C/N ratio is disclosed and comprises the following steps: (1) inoculation; (2) sewage feeding; (3) aeration; (4) standing for discharging; (5) repeated treatment; (6) pH shock. Growth of AOB can be promoted better, nitrification is inhibited,energy consumption of a reaction device can be reduced effectively, startup period for shortcut nitrification is shortened, and rapid startup for shortcut nitrification of domestic sewage with low ammonia nitrogen content can be realized.

Description

technical field [0001] The invention relates to a short-range nitrification quick-starting device and method for urban domestic sewage at normal temperature and low carbon-to-nitrogen ratio. Background technique [0002] Due to the large volume of urban domestic sewage and the low C / N ratio, the conventional activated sludge treatment process (A / O, oxidation ditch, A2 / O process) has high aeration energy consumption, long treatment cycle, large sludge production and large occupation Disadvantages such as land area. In view of the inherent shortcomings of the traditional denitrification process and the current requirements for energy saving and consumption reduction, a series of new denitrification processes for sewage denitrification have been developed, mainly focusing on short-range nitrification-denitrification and short-range nitrification-ANAMMOX craft. The short-cut nitrification-denitrification biological nitrogen removal process has the advantages of saving aeration...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the conventional SBR short-range nitrification process, the present invention proposes a more accurate, optimized and easy-to-operate operation method, and further provides a short-range nitrification quick-starting device and method for urban domestic sewage at room temperature and low carbon-nitrogen ratio, which solves the problem of the current low C / N urban life. In the short-cut nitrification process of sewage (especially the short-cut nitrification of low-ammonia nitrogen wastewater), there are problems such as slow proliferation efficiency of ammonia oxidizing bacteria (AOB), low nitrite accumulation efficiency, and long start-up period of short-cut nitrification.

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