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SBR (Sequencing batch reactor) nitrosation quick start method

A rapid start-up, nitrosation technology, applied in the field of urban sewage treatment and resource utilization, to achieve the effect of high start-up efficiency

Inactive Publication Date: 2013-05-22
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the growth characteristics of the two strains and the suitable conditions for survival are similar. How to quickly separate AOB from the mixed system and elutriate NOB out of the system, and realize the rapid start of nitrosation is the key to the application of this process in engineering practice. technology

Method used

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  • SBR (Sequencing batch reactor) nitrosation quick start method
  • SBR (Sequencing batch reactor) nitrosation quick start method
  • SBR (Sequencing batch reactor) nitrosation quick start method

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Experimental program
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Embodiment Construction

[0022] The test is based on simulated sewage water, and the specific water quality is as follows:

[0023] Influent water quality in start-up stage: NH 4 + -N=300-500mg / L, pH=7.70~8.20, temperature 25±1℃.

[0024] Influent water quality in stable operation stage with medium ammonia nitrogen: NH 4 + -N=150±15mg / L, pH=7.70~8.20, temperature 25±1℃.

[0025] Influent water quality in low ammonia nitrogen stable operation stage: NH 4 + -N=50±5mg / L, pH=7.70~8.20, temperature 25±1℃.

[0026] The specific treatment is as follows:

[0027] For the operation effect of nitrosative sludge during the start-up phase figure 1

[0028] Inoculate the returned nitrification sludge of the sewage treatment plant into the SBR reactor, control the concentration of ammonia nitrogen in the influent to 300-500mg / L, control the aeration rate to keep the dissolved oxygen at 0.2-0.5mg / L, and control the aeration time to make the ammonia oxidation rate Control it at 30%-50%, add sodium bicarbona...

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Abstract

The invention discloses an SBR (sequencing batch reactor) nitrosation quick start method, and belongs to the field of urban sewage treatment and resource recycling. Aiming at the problems that AOB (Ammonia Oxidizing Bacteria) and NOB (Nitrite Oxidizing Bacteria) are similar in growth characteristics and AOB are difficult to separate and screen, returned nitration sludge in a sewage treatment plant is inoculated in an SBR reactor, the inflow ammonia nitrogen concentration is controlled at 300-500mg / L, the aeration quantity is controlled so that the concentration of dissolved oxygen is 0.2-0.5mg / L, the aeration time is controlled so that the ammoxidation rate is controlled at 30-50%, sodium hydrogen carbonate is added to regulate and control pH at 7.70-8.20, and the outflow nitrosation rate that is the ratio of nitrite accumulated by reaction and the sum of accumulated nitrite and nitrate is calculated by maintaining the conditions. The nitrosation rate reaches more than 90% after 4 days and 8 cycles, and the nitrosation rate is always more than 90% after 7 days and 14 cycles, so that the nitrosation is successively started.

Description

technical field [0001] The invention belongs to the field of urban sewage treatment and recycling. In particular, it relates to a method for quickly starting SBR nitrosation. Background technique [0002] In my country, with the development of industrial and agricultural production and the improvement of people's living standards, a large amount of untreated or improperly treated nitrogen-containing wastewater is discharged into rivers. Under certain conditions, the dissolved oxygen in the water body can be exhausted, affecting fish and fish. The survival of other aquatic animals and plants also promotes the reproduction of algae, causing more and more serious problems such as eutrophication of water bodies. [0003] For the treatment of nitrogen pollution in wastewater, biological denitrification technology has the characteristics of simple process, low cost and easy promotion compared with other denitrification technologies (such as physical method and chemical method), so...

Claims

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Application Information

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IPC IPC(8): C02F3/12C02F3/34
CPCY02W10/10
Inventor 李冬苏东霞张功良张肖静梁瑜海周元正张玉龙吴青苏庆岭张翠丹门绚杨胤何永平范丹罗亚红曾辉平张杰
Owner BEIJING UNIV OF TECH
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