High-efficient denitriding reactor of continuous flow

Abstract

The invention discloses a high-efficient denitriding reactor of a continuous flow, comprising a reactor body; the reactor is orderly provided with a separating zone (I) and a reaction zone (II) from top to bottom; a longitudinal clapboard II (20) is arranged in the separating zone (I) for dividing the separating zone (I) into left and right half zones, wherein the left half zone is a water outlet zone (11), and the right half zone is an air release zone (10); the upper part of the a water outlet zone (11) is provided with an overflow weir (11.3), overflow tanks (11.6) are formed at the inner wall of the overflow weir (11.3) and the water outlet zone (11); the bottom parts of the overflow tanks (11.6) are provided with water outlet pipes (11.4), a longitudinal clapboard I (7) in is arranged in the reaction zone (II) to divide the reaction zone (II) into left and right half zones. The high-efficient denitriding reactor is good for the gathering culture of microorganisms, maintain relative fixation of a biophase, process sewage with high COD concentration, fully use the anaerobic ammonia oxidation to produce gas, and avoid AOB interception by filler in an anaerobic zone.

Description

technical field [0001] The invention belongs to the field of biological denitrification reactors, in particular to a continuous-flow high-efficiency denitrification reactor. Background technique [0002] Short-cut nitrification-anammox technology is the most economical biological denitrification technology known at present, and it is a sustainable sewage treatment technology. The reaction principle is as follows (considering microbial synthesis): [0003] Short-cut nitrification: [0004] [0005] The short-range nitrifying bacteria (AOB) generation cycle is about 0.53d, oxidizing 1mg NH 4 + for NO 2 - The cell yield was 0.15 mg and the aerobic amount was 3.16 mg. [0006] Anammox: [0007] [0008] The generation cycle of anaerobic ammonia oxidizing bacteria (AAOB) is about 11 days, and the reaction of 1mg NH 4 + for N 2 The cell yield was 0.11 mg. [0009] The short-cut nitrification process only needs about 1 / 2 of the NH in the raw water 4 + -N oxidatio...

AI Technical Summary

Problems solved by technology

[0014] (1) When the concentration of ammonia nitrogen in the influent is low, the aeration rate must be adjusted to be small, and the insufficient internal circulation driving force will definitely affect the progress of mass transfer and reaction

If the aeration rate is not adjusted down, the dissolved oxygen (DO) in the aerobic zone will be too high, resulting in a large number of nitrite oxidizing bacteria (NOB), and the NOB will increase the NO 2 - -N oxidation to NO 3 - -N, causing the anaerobic ammonia oxidizing bacteria (AAOB) in the anaerobic zone to lack the substrate NO 2 - -N, the anammox cannot be performed and the system crashes

[0015] (2) When the mud-water mixture is circulated to the anaerobic zone, the sludge is easily trapped by the filler in the anaerobic zone (while AOB in the anaerobic zone has no dissolved oxygen, it is difficult to survive and will gradually die), and it is difficult to return to the aerobic zone Participate in short-cut nitrification and thus the volume efficiency of the reactor is low

At the beginning of this phenomenon, the sludge in the mud-water mixture will be continuously intercepted by the filler in the anaerobic zone, the AOB in it will gradually die, and the amount of sludge will decrease. Under the same aeration rate, the dissolved oxygen will increase. The higher the value, the dissolved oxygen in the anaerobic zone will gradually increase, and eventually the whole system will collapse

[0016] (3) Difficult to bear high COD load

[0017] (4) There is no three-phase separator at the top of the anaerobic zone, and the gas production interferes with the sedimentation effluent, resulting in the loss of sludge including anaerobic ammonium oxidizing bacteria (AAOB)

Simultaneous sludge discharge without distinction will expel the slow-growing anammox bacteria out of the system

[0020] (2) Difficult to control dissolved oxygen (DO)

Simultaneous sludge discharge without distinction will expel the slow-growing anammox bacteria out of the system

[0023] (2) Difficult to control dissolved oxygen (DO)

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