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A rapid realization method of short-range denitrification

A short-path denitrification and reactor technology, which is applied in the field of rapid realization of short-path denitrification of wastewater, achieves the effect of simple realization process and mild operating conditions

Active Publication Date: 2020-09-15
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are few reports on how to realize the rapid enrichment of Thauera in the reactor

Method used

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  • A rapid realization method of short-range denitrification
  • A rapid realization method of short-range denitrification
  • A rapid realization method of short-range denitrification

Examples

Experimental program
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Embodiment 1

[0021] A method for quickly realizing short-range denitrification of wastewater, comprising the following steps: (1) using the sludge from the secondary settling tank of a municipal sewage plant as the inoculation sludge, using an anaerobic reactor to enrich the S 2- , NO 3 - , phenol, NaCl simulated wastewater is influent, wherein the simulated wastewater S 2- The concentration is 100mg / L, S 2- with NO 3 - -N mass ratio is 1.2, S 2- The mass ratio with phenol (expressed in COD) is 0.8, the addition of described NaCl is controlled at 50g / L, and the NaHCO of adding 2g / L 3 It is an inorganic carbon source, and the reactor is started under the conditions of influent pH of 7.2, reactor temperature of 28-32°C, and HRT of 2 hours. 2- , NO 3 - , Phenol removal rate up to 50%, NO 2 - When the accumulation rate reaches more than 40%, the start-up of the reactor is completed; at this time, the abundance of Thauera in the sludge in the reactor reaches more than 20%; (2) remove ...

Embodiment 2

[0023] The present embodiment is different from embodiment 1 in that: step (1) adds NaHCO 3 It is 1.0g / L, the pH of the reactor feed water is 7.2, the reactor temperature is 28°C, and the HRT is 0.5h. Other steps and parameters are the same as in Example 1.

Embodiment 3

[0025] The present embodiment is different from embodiment 1 in that: step (1) adds NaHCO 3 It is 3.0g / L, the pH of the reactor water is 7.7, the temperature of the reactor is 32°C, and the HRT is 10h. Other steps and parameters are the same as in Example 1.

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Abstract

The invention relates to a rapid short-cut denitrification implementation method for wastewater, which includes the following steps: (1) the sludge of a secondary sedimentation tank of a municipal sewage treatment plant is adopted as inoculated sludge, an anaerobic reactor is adopted, simulated wastewater which is rich in S2<->, NO3<->, phenol and NaCl is adopted as influent water, 1g / L to 3g / L of carbonate is added as an inorganic carbon source, the reactor is started under the conditions of influent water pH being 7.2 to 7.7, reactor temperature being 28 DEG C to 32 DEG C and HRT being 0.5 to 10 hours, and when the removal rate of pollutants (S2<->, NO3<-> and phenol) in the reactor reaches 50 percent and the accumulation rate of NO2<-> reaches 40 percent or more, the starting of the reactor is complete; and at the moment, the Thauera abundance in the sludge in the reactor reaches 20 percent or more; (2) S2<->, phenol and NaCl in the influent water are removed, acetate is added, and the mass ratio of COD (chemical oxygen demand) to NO3<->-N in the influent water is controlled as 0.8 to 4.0; under the conditions of influent water pH value being 7.2 to 7.7, reaction temperature being 28 DEG C to 32 DEG C and HRT being 0.5 to 10 hours, when the accumulation rate of NO2<-> in the system reaches 75 percent or more, the shut-cut denitrification of the wastewater is fulfilled, and at the moment, the Thauera abundance in the sludge in the reactor reaches 40 percent or more. The method has the advantages of mild operation conditions, simple implementation process and the like.

Description

technical field [0001] The invention belongs to the technical field of wastewater biological treatment, and relates to a method for rapidly realizing short-range denitrification of wastewater. Background technique [0002] With the development of industry and the continuous improvement of people's living standards, the discharge of nitrogen-containing pollutants has gradually increased, and has brought serious harm to the environment. After nitrogen-containing pollutants are discharged into the water body, they not only consume dissolved oxygen in the water, cause black odor, cause eutrophication of the water body, but also cause a large number of aquatic organisms to die and seriously damage the aquatic ecosystem. The development of cost-effective wastewater denitrification technology has been the focus of research in the field of environmental engineering in recent years. [0003] Anaerobic ammonia oxidation technology is one of the most economical wastewater denitrificat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/28
CPCC02F3/28
Inventor 刘春爽李雪晨李文斐赵东风李伟赵朝成刘芳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)