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
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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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