Quick starting method for autotrophic nitrogen removal process of sludge-membrane mixed moving bed bio-membrane reactor

Abstract

The invention discloses a quick starting method for a whole-course autotrophic nitrogen removal process of a sludge-membrane mixed moving bed bio-membrane reactor, which comprises the following steps: firstly, inoculating short-cut nitrification flocculent sludge, adding suspended filler, forming an MBBR (Moving Bed Biofilm Reactor), controlling the ratio of inlet water ammonia nitrogen concentration to nitrous concentration at normal temperature, and maintaining a short distance under a relatively high aeration rate, so as to properly prolong anoxic time and successfully enrich the anaerobic ammonium oxidation bacteria. After the anaerobic ammonia oxidation reaction is started, the aeration rate is gradually reduced, the DO is reduced, the aeration time is prolonged, and the aerobic ammonia oxidizing bacteria and the AnAOB are induced to simultaneously perform short-cut nitrification and anaerobic ammonia oxidation reaction in the aeration stage. According to the invention, efficient removal of ammonia nitrogen is realized, a method is provided for applying the MBBR to long-term efficient stable operation of the whole-course autotrophic nitrogen removal process, and the problems that the whole-course autotrophic nitrogen removal process is slow in starting and strict in seed sludge requirement are solved.

Description

technical field

[0001] The invention belongs to the field of urban sewage treatment and regeneration, and in particular relates to a rapid start-up method for an autotrophic denitrification process of a mud film mixed moving bed biofilm reactor. Background technique

[0002] The whole autotrophic denitrification process is to put part of the short-range nitrification and anammox reaction in the same reactor for denitrification. Compared with the traditional denitrification process, this process can save a lot of aeration energy consumption and does not need to add organic carbon Source, high denitrification efficiency, and low sludge output, has very broad application prospects. However, the doubling time of anaerobic ammonium oxidizing bacteria (AnAOB) in the autotrophic denitrification process is as long as 11 days, the growth is slow, and it is easy to lose and difficult to enrich, which makes it difficult to start the reactor. Therefore, how to realize the rapid start-u...

Examples

Embodiment 1

[0025] The cultivation method of the short-course nitrification flocculent sludge is as follows: at an aeration rate of 1.2 L / (min L) and an influent ammonia nitrogen concentration of 200 mg / L, the concentration of CaCO 3 Under the condition that the calculated alkalinity concentration is 1400mg / L, operate in sequence batch mode, control the ammonia oxidation rate to be over 50% and the nitrite nitrogen accumulation rate to be over 95% for more than one month, and short-range nitrification flocculent pollution can be obtained. Sludge, the proportion of AOB flora in sludge is 42.95%.

[0026] The reactor adopted in this embodiment is a mud film mixed moving bed biofilm reactor (MBBR), and the effective volume of the reactor is 20L. An aeration device is installed at the bottom of the reactor. The concentration of dissolved oxygen (DO) and the built-in agitator ensure that the muddy water is evenly mixed, and the effluent is sucked out by a peristaltic pump. Inoculate short-ran...

technical field

[0001] The invention belongs to the field of urban sewage treatment and regeneration, and in particular relates to a rapid start-up method for an autotrophic denitrification process of a mud film mixed moving bed biofilm reactor. Background technique

[0002] The whole autotrophic denitrification process is to put part of the short-range nitrification and anammox reaction in the same reactor for denitrification. Compared with the traditional denitrification process, this process can save a lot of aeration energy consumption and does not need to add organic carbon Source, high denitrification efficiency, and low sludge output, has very broad application prospects. However, the doubling time of anaerobic ammonium oxidizing bacteria (AnAOB) in the autotrophic denitrification process is as long as 11 days, the growth is slow, and it is easy to lose and difficult to enrich, which makes it difficult to start the reactor. Therefore, how to realize the rapid start-u...

Examples

Embodiment 1

[0025] The cultivation method of the short-course nitrification flocculent sludge is as follows: at an aeration rate of 1.2 L / (min L) and an influent ammonia nitrogen concentration of 200 mg / L, the concentration of CaCO 3 Under the condition that the calculated alkalinity concentration is 1400mg / L, operate in sequence batch mode, control the ammonia oxidation rate to be over 50% and the nitrite nitrogen accumulation rate to be over 95% for more than one month, and short-range nitrification flocculent pollution can be obtained. Sludge, the proportion of AOB flora in sludge is 42.95%.

[0026] The reactor adopted in this embodiment is a mud film mixed moving bed biofilm reactor (MBBR), and the effective volume of the reactor is 20L. An aeration device is installed at the bottom of the reactor. The concentration of dissolved oxygen (DO) and the built-in agitator ensure that the muddy water is evenly mixed, and the effluent is sucked out by a peristaltic pump. Inoculate short-ran...

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