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Sludge reflow-free device with simultaneous nitrification and denitrification (SND) function and operation control method thereof

A technology without backflow and sludge, applied in various fluid ratio control, aerobic and anaerobic process treatment and other directions, can solve the problem of difficult to control microbial metabolic environment, etc., to solve the difficult to control microbial metabolic environment, prolong membrane life, Human controllable effect

Active Publication Date: 2011-09-07
ZHEJIANG GONGSHANG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention also provides an operation control method of a sludge non-reflux device with SND denitrification function, the method is controllable in operation, and solves the problem that the SND process is difficult to control the microbial metabolic environment

Method used

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  • Sludge reflow-free device with simultaneous nitrification and denitrification (SND) function and operation control method thereof
  • Sludge reflow-free device with simultaneous nitrification and denitrification (SND) function and operation control method thereof
  • Sludge reflow-free device with simultaneous nitrification and denitrification (SND) function and operation control method thereof

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Embodiment 1

[0065] Taking the domestic sewage transferred by the urban domestic sewage pipe network pumping station in Cuiyuan District 1, Hangzhou City as the influent, add sucrose during the start-up period, adjust the C / N ratio of the wastewater to about 20, and domesticate the activated sludge and The reactor device was tested, and the dosage of sucrose was gradually eliminated after about 10 days of domestication, and the raw water was completely used as the influent after 20 days.

[0066]After 2 months of operation, the concentration of total nitrogen in the influent is between 51.45-70.02mg / L, the concentration of COD in the influent is 366-742.16mg / L, and the concentration of ammonia nitrogen in the influent is between 40.85-63.21mg / L. Under the condition of stable operation of the reactor, the test results of the effluent water quality are shown in the table below, and there is basically no residual sludge discharge.

[0067] Influent C / N ratio

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Abstract

The invention discloses a sludge reflow-free device with a simultaneous nitrification and denitrification (SND) function. The device comprises a pool body; the sidewall of the pool body is provided with a main water inlet; the interior of the pool body is divided by a clapboard into a diversion area, an aeration area and a sludge precipitation area in sequence; the aeration area is internally provided with an overflow groove; the bottom of the aeration area is provided with microporous aeration devices distributed uniformly; and the sludge precipitation area is internally provided with a membrane element. The invention also discloses an operation control method of the device. By skillful arrangement of aeration pipes and combined use with a biological membrane, the power cost and the operating cost of sludge reflow are saved, and the purpose of reducing energy consumption is achieved. The biological environment to be achieved by the simultaneous nitrification and denitrification is adjusted indirectly through adjusting parameters such as active sludge concentration, sludge age, unit sludge load and the like; the operation is strong in human controllability, and the problem that the microbial metabolic environment in the SND technology is not easy to control is solved.

Description

technical field [0001] The invention relates to the technical field of biological nitrogen removal with synchronous nitrification and denitrification effects, in particular to a sludge non-reflux device with sewage denitrification function and an operation control method thereof. Background technique [0002] The biological denitrification process includes two main reactions of nitrification and denitrification. Traditional biological denitrification first converts organic nitrogen in sewage into ammonia nitrogen, then converts ammonia nitrogen into nitrate nitrogen and nitrite nitrogen through nitrifying bacteria, and finally undergoes denitrification. Bacterial denitrification converts it to release nitrogen gas. Because the chemical environment required by the two reactions is very different, the traditional process is to treat nitrification and denitrification as two independent stages in space or time to achieve nitrogen removal, but because the nitrification reaction c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30G05D11/02
Inventor 冯华军沈霞娟赵博吴春金余秋璟张倩
Owner ZHEJIANG GONGSHANG UNIVERSITY
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