Control method of integrated short-cut nitrification-ANAMMOX denitrification process

Abstract

The invention discloses a control method of an integrated short-cut nitrification-anaerobic ammonia oxidation de-nitrification process. The control method comprises the steps of water feeding, anaerobic stirring I, aerobic aeration, anaerobic stirring II, precipitation, drainage and idling. In the aerobic aeration stage, a dissolved oxygen electrode is used for controlling the aeration amount, thedissolved oxygen concentration increment [delta]DO, which is larger than or equal to 0.5 mg / L, is used as the aeration end point, and the ammonia nitrogen retention concentration NH4<+>-N is controlled to be approximately equal to 0 mg / L. In the water inlet stage, the NO2<->-N of the reactor is controlled to be less than or equal to 100mg / L; in the aerobic aeration stage, the DO is controlled tobe smaller than or equal to 0.3 mg / L, short-cut nitrification and anaerobic ammonia oxidation are conducted at the same time, and the concentration of NO2<->-N ranges from 0 mg / L to 50 mg / L. The technical problems of AAOB bacterium loss and poor effluent quality caused by ammonia nitrogen retention are solved, and meanwhile, the control method has the advantages of being high in treatment capacityand more stable.

Description

technical field [0001] The invention belongs to the field of novel biological denitrification, and in particular relates to an integrated short-range nitrification-anammox wastewater denitrification device and method. Background technique [0002] Anammox technology is currently recognized as the most economical biological denitrification technology, but it is difficult to be practically applied in engineering. [0003] The anammox technology has not been widely used in engineering practice, mainly because: ① The activity of anammox bacteria is strictly limited by temperature, pH, DO, organic matter and substrate (reactive substrate NH 4 + -N, NO 2 - -N is also an inhibitor, especially NO 2 - -N suppression) and other influencing factors lead to problems such as low impact resistance and poor stability. ② Due to the low yield of AAOB strains, long generation cycle, and easy loss of AAOB strains, it is difficult to enrich anammox bacteria. [0004] Prior art CN 1032263...

AI Technical Summary

Problems solved by technology

[0002] Anaerobic ammonia oxidation technology is currently recognized as the most economical biological denitrification technology, but it is difficult to apply it in engineering

[0003] The anammox technology has not been widely used in engineering practice, mainly because: ① The activity of anammox bacteria is strictly limited by temperature, pH, DO, organic matter and substrate (reactive substrate NH 4 + -N, NO 2 - -N is also an inhibitor, especially NO 2 - -N suppression) and other influencing factors lead to problems such as low impact resistance and poor stability

② Due to the low yield of AAOB strains, long generation cycle, and easy loss of AAOB strains, it is difficult to enrich anammox bacteria

Bubbles generated by the reaction (N 2 ) adheres to the anaerobic ammonia oxidation sludge, causing the sludge to float up and be discharged with the effluent, causing the loss of AAOB bacteria and affecting the effluent water quality

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