A kind of rapid start-up method of anaerobic ammonium oxidation reactor

A rapid start-up technology of anaerobic ammonium oxidation, which is applied in the field of rapid start-up of anammox reactors, can solve problems such as difficulty in starting the anammox process, limiting the popularization and application of the anammox process, and slow growth

Active Publication Date: 2011-11-30
江苏清材智能制造有限公司
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AI Technical Summary

Problems solved by technology

[0003] As an autotrophic bacterium, the cell yield of anammox bacteria is very low, the doubling time is long, the growth is slow, and it is sensitive to environmental conditions, making the start-up of the anammox process very difficult and time-consuming
Start-up of world's first

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0015] Example 1:

[0016] Use ordinary aerobic activated sludge (taken from the aeration tank of Hangzhou Sibao sewage treatment plant) to start the baffled anammox reactor with an effective volume of 13.5L.

[0017] The temperature is controlled at 30±1°C, the pH of the inlet water is controlled at 8.0±0.5, the molar ratio of ammonia to nitrite in the inlet water is 1:1, and the outlet of the reactor is water-sealed to prevent oxygen in the air from entering the reactor. The initial ammonia and nitrite concentrations are both 70mgN·L -1 , The initial hydraulic retention time is set to 24h. The aerobic activated sludge accounts for 50% of the effective volume of the reactor at startup.

[0018] The influent is simulated wastewater with the composition (NH 4 ) 2 SO 4 70mgN·L -1 , NaNO 2 70mgN·L -1 , KH 2 PO 4 10mg·L -1 , CaCl 2 ·2H 2 O 5.6mg·L -1 , MgSO 4 ·7H 2 O 300mg·L -1 , KHCO 3 1250mg·L -1 , Trace element concentrate I and II 1.25mL·L each -1 , The solvent is water.

[0019] Amo...

Example Embodiment

[0021] Example 2:

[0022] Using simulated wastewater (the composition is the same as in Example 1), and using nitrogen to remove oxygen, the oxygen content in the water body is lower than 0.5% air saturation. The pH of the inlet water is controlled at 8.2±0.2. The reactor air outlet is water-sealed to prevent oxygen in the air from entering the reactor. Inoculate 4.6L of nitrification sludge (taken from the air-stripping nitrification reactor) in an upflow anaerobic sludge bed reactor with an effective volume of 8.6L, and the SS is 23.6g·L -1 , VSS / SS is 61.0%. At startup, the nitrified sludge accounts for 65% of the effective volume of the reactor. When the reactor is started, 0.2L of anammox sludge (taken from the anammox reactor) that has been successfully enriched and cultivated is added, and the ratio of the amount of sludge added to the effective volume of the reactor is 1:23. After that, 0.2L of anammox sludge successfully enriched and cultivated was added to the react...

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PUM

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Abstract

The invention provides a method for quickly starting an anaerobic ammonia oxidation reactor. A small amount of anaerobic ammonia oxidation sludge subjected to enrichment culture successfully is regularly added into a reactor for starting an anaerobic ammonia oxidation process by using non-anaerobic ammonia oxidation sludge (such as nitrification sludge, denitrification sludge, methane-producing sludge and the like) to provide certain growth factors for the reactor, so that the starting condition of the anaerobic ammonia oxidation process is improved, and a part of bacterium sources can be increased to accelerate the enrichment of anaerobic ammonia oxidation bacteria in the sludge in the reactor; and substrate concentration and hydraulic retention time are timely adjusted on the basis to avoid substrate lack and accelerate the growth of the anaerobic ammonia oxidation bacteria and the process of granulating the sludge, so that the starting time of the anaerobic ammonia oxidation reactor is greatly shortened, and the popularization and application of the anaerobic ammonia oxidation process are facilitated.

Description

(1) Technical field [0001] The invention relates to a quick starting method of an anaerobic ammonium oxidation reactor. (2) Background technology [0002] The accumulation of nutrient elements such as nitrogen in the water body will lead to eutrophication of the water body and cause serious damage to the water body ecosystem. Anammox bacteria can use nitrite as an electron acceptor to oxidize ammonia to generate nitrogen and remove nitrogen in water. Compared with the traditional nitrification and denitrification biological denitrification process, the new anammox denitrification process based on anammox bacteria has the advantages of low consumption and high efficiency, and has a bright application prospect. [0003] As an autotrophic bacterium, the anammox bacteria have low cell yield, long doubling time, slow growth, and are sensitive to environmental conditions, making it very difficult and time-consuming to start the anammox process. The start-up of the world's first ...

Claims

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Application Information

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IPC IPC(8): C02F3/28
CPCY02E50/30
Inventor 金仁村阳广凤马春俞津津余妤邢丽娜
Owner 江苏清材智能制造有限公司
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