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CANON (Completely Autotrophic Nitrogen removal Over Nitrite) process starting method for MBR (Membrane Bioreactor)

A technology in the process and start-up stage, which is applied in the field of rapid start-up of the CANON process, can solve the problems of hard to obtain seed sludge, low removal load, and easy loss of sludge, so as to improve bacterial activity and treatment efficiency, prevent sludge loss, and be superior The effect of living conditions

Active Publication Date: 2014-07-23
BEIJING UNIV OF TECH
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Problems solved by technology

However, the clogging problem of the biofilm method has not been effectively solved, and the sludge in the SBR and MABR methods is easy to lose, resulting in a reduction in biomass and low removal load, and because AOB and Anammox bacteria are autotrophic bacteria, they grow slowly, especially Anammox bacteria , with a doubling time of 11 days, resulting in a long start-up time for the CANON process
The CANON process is faced with problems such as long start-up time and difficulty in increasing the load due to low sludge concentration and difficulty in obtaining seed sludge.

Method used

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  • CANON (Completely Autotrophic Nitrogen removal Over Nitrite) process starting method for MBR (Membrane Bioreactor)
  • CANON (Completely Autotrophic Nitrogen removal Over Nitrite) process starting method for MBR (Membrane Bioreactor)
  • CANON (Completely Autotrophic Nitrogen removal Over Nitrite) process starting method for MBR (Membrane Bioreactor)

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Embodiment 1

[0031] The reactor is a cylindrical MBR reactor made of plexiglass. The inner diameter of the cylinder is 13cm, the height is 40cm, the effective volume is 3L, and the built-in polyvinylidene fluoride (PVDF) hollow fiber membrane module, the membrane pore diameter is 0.1μm, and the membrane flux is 36L / h. The bottom of the reactor is equipped with an aeration plate, which adopts blower aeration, and the aeration volume is controlled by a rotameter, and there is a stirrer in the middle for substrate and O 2 Uniform diffusion, a water bath sleeve is set outside, and the temperature inside the reactor is controlled by a temperature controller. The test was inoculated with ordinary activated sludge from a sewage treatment plant, and artificially distributed water with ammonia nitrogen = 190-210 mg / L was used as the basic water, and heated by a water bath to control the temperature in the reactor to 23. From ℃ to 2 experiments at 5℃, intermittent operation is adopted. Each cycle i...

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Abstract

The invention relates to a CANON (Completely Autotrophic Nitrogen removal Over Nitrite) process starting method for an MBR (Membrane Bioreactor) and belongs to the field of the denitrification treatment and regeneration of municipal domestic sewage. According to the method, the MBR is only inoculated with ordinary active sludge, a CANON process is started successfully in 46 days by a nitrosification start-up and stable-operation stage, a CANON process start-up stage and a CANON process load increase stage through adjusting aeration, aeration time and the concentration of inorganic carbon under the condition of limited oxygen, the total nitrogen removal load can reach 0.41kgN / m<3> / d to the maximum and is 0.38kgN / m<3> / d to the average after 76 days, and then, the quick start and efficient and stable operation of the CANON process are successfully realized.

Description

technical field [0001] The invention belongs to the field of urban domestic sewage treatment and regeneration, and in particular relates to a quick start method of the CANON process. Background technique [0002] CANON (Completely Autotrophic Nitrogen removal Over Nitrite) process refers to ammonia oxidizing bacteria (AOB) under oxygen-limited conditions, using oxygen as an electron acceptor to oxidize part of ammonia nitrogen to nitrite nitrogen, anaerobic ammonia oxidation (anaerobic ammonia oxidation) ammonium-oxidation (Anammox) bacteria use the nitrite nitrogen produced by AOB as the electron acceptor, react with the remaining ammonia nitrogen, generate nitrogen and release it, and complete the denitrification process of wastewater. Compared with other denitrification processes, the CANON process has the advantages of high denitrification efficiency, low oxygen consumption, no need for additional organic carbon sources, low sludge production, economical and environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34
Inventor 李冬何永平范丹路健张金库姜沙沙梁雨雯王朗杨杰卫家驹
Owner BEIJING UNIV OF TECH
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