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Method for quickly starting anaerobic ammonia oxidation reactor

A rapid start-up technology of anaerobic ammonium oxidation, applied in the field of rapid start-up of anammox reactor, can solve the problems of difficult start-up, slow growth and long time consumption of anammox process

Active Publication Date: 2013-01-23
江苏清材智能制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 industrial-scale anammox reactor took nearly 3 years
This greatly limits the promotion and application of the anammox process, so the development of a rapid start-up method for the anammox reactor can effectively promote the research and industrial application of the anammox process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Ordinary aerobic activated sludge (taken from the aeration tank of Hangzhou Sibao Wastewater Treatment Plant) was used 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 concentration of ammonia and nitrite is 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 start-up.

[0018] The influent was simulated wastewater, the composition of which was (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 , each 1.25mL·L of trace element concentrate solution I and II -1 , t...

Embodiment 2

[0022] Adopt simulated waste water (the composition is the same as that of Example 1), and use nitrogen to remove oxygen, so that the oxygen content in the water body is lower than 0.5% of the air saturation. Influent pH is controlled at 8.2±0.2. The outlet of the reactor is water-sealed to prevent oxygen in the air from entering the reactor. Inoculate 4.6L of nitrification sludge (taken from the airlift 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%. Nitrified sludge accounts for 65% of the effective volume of the reactor at start-up. When the reactor was started, 0.2 L of enriched anammox sludge (taken from the anammox reactor) was added, and the ratio of the added sludge to the effective volume of the reactor was 1:23. After that, 0.2 L of anammox sludge that was successfully enriched was added to the reactor every 10 days. The control temperature is 35±1°C, the hydraulic rete...

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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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Patent Type & Authority Patents(China)
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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