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Air lift type bio-nitrification reactor with baffle plate reinforcing internal circulation

A nitrification reactor and baffle technology, which can be used in sustainable biological treatment, chemical instruments and methods, biological water/sewage treatment, etc. Quality efficiency and oxygen utilization efficiency, good high nitrification performance, ensuring the effect of effluent clarification

Active Publication Date: 2015-04-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the DO concentration is high, it will easily lead to the oxidation of nitrite to nitrate, but if the DO concentration is low, the dissolved oxygen will be insufficient, the ammonia oxidation will be limited, and the denitrification efficiency of the reactor will decrease.

Method used

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  • Air lift type bio-nitrification reactor with baffle plate reinforcing internal circulation
  • Air lift type bio-nitrification reactor with baffle plate reinforcing internal circulation
  • Air lift type bio-nitrification reactor with baffle plate reinforcing internal circulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0032] During the operation of the reactor, keep the concentration of ammonia nitrogen in the influent at 500 mg / L, the concentration of sludge at 4 g / L, the hydraulic retention time at 15.2 hours, and the pH of the influent at 8.4 to 8.7. By adjusting the amount of aeration, the dissolution in the reaction chamber The oxygen (DO) concentration can be stabilized between 0.75 and 0.95. During the 17-day operation, the ammonia nitrogen removal rate of the reactor gradually increased from 73.7% to 95.4%, and the nitrite accumulation rate was maintained at 80% to 90%. Shows good short-range nitrification performance.

[0033] Table 1 Nitrification performance when the influent ammonia nitrogen concentration is 500mg / L

[0034]

Embodiment example 2

[0036] Keep the concentration of ammonia nitrogen in the influent at 700mg / L, the concentration of sludge at 4g / L, the hydraulic retention time at 15.2h, and the pH of the influent at 9.1-9.6. By adjusting the amount of aeration, the concentration of dissolved oxygen (DO) in the reaction chamber is stabilized at Between 0.8 and 1.6, during 11 days of operation, the ammonia nitrogen removal rate of the reactor gradually increased to 96.5%, and the nitrite accumulation rate still reached 85.5%, and the short-range nitrification performance was very stable.

[0037] Table 2 Nitrification performance when the influent ammonia nitrogen concentration is 700mg / L

[0038]

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PUM

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Abstract

The invention discloses an air lift type bio-nitrification reactor with a baffle plate reinforcing internal circulation. The air lift type bio-nitrification reactor with the baffle plate reinforcing internal circulation comprises a reaction chamber and a sedimentation chamber which are arranged from bottom to top, wherein the reaction chamber is connected with the sedimentation chamber by virtue of a funnel-shaped diffusion tube, a water inlet pipe is arranged at the bottom of the reaction chamber, a gas guiding pipe and a sampling pipe which are inserted into the center of the reaction chamber are arranged on the side wall of the reaction chamber, the interior of the reaction chamber is divided into an upflow region and a flow falling region by virtue of a separating baffle, a baffling region formed by the baffle plate is arranged in the diffusion tube, a gas releasing baffling sloping plate, a flow reducing baffling sloping plate and a water yielding baffling sloping plate are arranged in the sedimentation chamber, the sedimentation chamber is divided into a gas releasing region, a slow flow region and a water discharging region, the water discharging region is connected with a water discharging pipe, and an air hole is formed in the top of the sedimentation tank. The air lift type bio-nitrification reactor with the baffle plate reinforcing internal circulation has the advantages that mud, water and gas three-phase circulation in the reaction chamber can be reinforced, and oxygen utilization efficiency is improved; elution of sludge can be effectively avoided, and high biological sludge content in the reactor is maintained; and good impact load resistance and high nitrification performance can be realized.

Description

technical field [0001] The invention relates to an air-lift type biological nitrification reactor with baffle plates strengthening internal circulation. Background technique [0002] After the national "One Control, Two Standards" campaign, the organic pollution of wastewater has been effectively controlled, nitrogen and phosphorus pollution has gradually become a major environmental problem, and nitrogen pollution of water bodies has occurred from time to time. In the "Twelfth Five-Year Plan", ammonia nitrogen was listed as a binding control indicator, becoming the second binding control indicator in water pollution control after the chemical oxygen demand (COD) in the "Eleventh Five-Year Plan". Nitrogen pollution control It is imminent. [0003] Short-cut nitrification is a new type of biological denitrification technology. This process avoids the oxidation of nitrite to nitrate by controlling ammonia oxidation in the nitrite stage. It can not only greatly save oxygen con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/02
CPCC02F3/02C02F2301/04Y02W10/10
Inventor 唐崇俭柴立元闵小波王海鹰杨志辉彭兵
Owner CENT SOUTH UNIV
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