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Method for realizing autotrophic deep denitrification of nitrogen-containing wastewater by utilizing anaerobic membrane bioreactor (MBR)

A technology for deep denitrification and waste water, applied in anaerobic digestion treatment, chemical instruments and methods, water pollutants, etc., can solve the problem that nitrate nitrogen cannot be removed, and achieve the reduction of residual sludge, low biomass, and operation Run simple effects

Active Publication Date: 2019-06-11
SUN YAT SEN UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the existing short-range nitrification and denitrification-ANAMMOX technology, which still contains part of the nitrate nitrogen that cannot be removed in the landfill leachate treatment water, and provides a method to realize the autotrophic depth of nitrogen-containing wastewater by using anaerobic MBR. Denitrification method

Method used

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  • Method for realizing autotrophic deep denitrification of nitrogen-containing wastewater by utilizing anaerobic membrane bioreactor (MBR)
  • Method for realizing autotrophic deep denitrification of nitrogen-containing wastewater by utilizing anaerobic membrane bioreactor (MBR)
  • Method for realizing autotrophic deep denitrification of nitrogen-containing wastewater by utilizing anaerobic membrane bioreactor (MBR)

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Embodiment 1～2

[0053] The nitrogen-containing wastewater used in the actual operation process is the effluent NO of the landfill leachate wastewater treated by the short-cut nitrification and denitrification coupling anaerobic ammonium oxidation process (application number: 2018105491807) in the early stage of the laboratory. 3 - The average concentration of -N is 130mg / L. The main components of synthetic wastewater with sulfide as sulfur source are shown in Table 1.

Embodiment 1

[0054] Example 1: Establishment of a stable process environment for deep denitrification based on sulfur autotrophic denitrifying bacteria film bioreactor

[0055] The sulfur autotrophic denitrification activated sludge described in the embodiments of the present invention is the activated sludge obtained from the sulfur autotrophic denitrification floc sludge obtained from the secondary sedimentation tank of a certain sewage treatment plant through domestication and cultivation for about 150 days. Sludge nitrogen and sulfur loads are 0.28kg-N / m 3 / d and 0.56kg-S / m 3 / d, the denitrification efficiency remained above 94%, the MLSS of sulfur autotrophic denitrification activated sludge in the reaction system was 9.4g / L, and the MLVSS / MLSS was 0.49. The process operating conditions at this stage are: use the water inlet pump as sewage to quickly feed water into the reactor (10min), and stir for 17h 50min through the magnetic stirrer and the magnetic stirrer placed at the bottom ...

Embodiment 2

[0062] Example 2: Denitrification effect of membrane bioreactor based on sulfur autotrophic denitrifying bacteria on different proportions of non-standard landfill leachate

[0063] The stable process system of the anaerobic MBR deep denitrification based on sulfur autotrophic denitrifying bacteria in embodiment 1 has been successfully started, and the nitrogen treatment load is stable to 0.18kg-N / (m 3 · d), the reactor starts to treat the landfill leachate wastewater, because the landfill leachate has complex components, complex toxic and harmful organic substances and heavy metal ions, the reactor will gradually adapt to the landfill leachate by changing the mixing ratio. As shown in Table 2, in order to gradually adapt the microorganisms in the reactor to landfill leachate wastewater, the influent water of the MBR reactor is mixed waste water of artificial water and landfill leachate, and the ratio of landfill leachate to artificial water is 20% to 100%. From image 3 It c...

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Abstract

The invention relates to a method for realizing autotrophic deep denitrification of nitrogen-containing wastewater by utilizing an anaerobic membrane bioreactor (MBR). The method comprises the following steps: S1, under an anoxic condition with a temperature of 20-35 DEG C and a pH value of 7.6-7.8, taking an anaerobic MBR as a reactor to repeat the following operations: introducing artificially synthesized wastewater with sulfides as a sulfur source into a sludge-water mixed solution of sulfur autotrophic denitrification activated sludge, carrying out stirring and domesticating treatment, anddischarging water, wherein the period is 18-24 hours, and domestication is completed when the removal rate of NO3<-> in effluent water is greater than or equal to 94%; and S2, introducing mixed wastewater of artificially synthesized wastewater and nitrogen-containing wastewater, carrying out stirring treatment under anoxic condition with a temperature of 20-35 DEG C and a pH value of 7.6-7.8, andthen carrying out discharging. Through the method provide by the invention, sewage treatment efficiency is high, the total nitrogen (TN) content in the effluent is less than or equal to 15 mg / L, andthe emission standard that the TN content is less than or equal to 40 mg / L in the (Standard for Pollution Control on the Landfill Site of Municipal Solid Waste) is met.

Description

technical field [0001] The invention belongs to the technical field of deep denitrification, and in particular relates to a method for realizing autotrophic deep denitrification of nitrogen-containing wastewater by using anaerobic MBR. Background technique [0002] Ammonia nitrogen in wastewater is the main substance that causes water eutrophication and environmental pollution. Ammonia nitrogen will also increase the amount of chlorine used in water supply disinfection and industrial circulating water sterilization. Therefore, it is very important to reduce the nitrogen content in water. Due to its advantages of high efficiency and economic feasibility, biological treatment technology has been widely used in the treatment of industrial wastewater and landfill leachate. [0003] In terms of landfill leachate disposal technology, my country issued and implemented the newly revised "Standards for Pollution Control of Landfill Sites of Domestic Waste" (GB16889-2008) in 2008, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F101/16
Inventor 吕慧彭荷衢刁兴兴孟了宋乃巧彭立宇赵晴周浩曾楚筠
Owner SUN YAT SEN UNIV
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