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Method for rapidly and stably starting wastewater nitrite type mixotrophic desulfurization and denitrification system

A technology of nitrite and nitrification system is applied in the field of start-up of nitrite-type facultative desulfurization and denitrification system of wastewater, which can solve the problems of repeated system start-up stages, unstable removal effect, and inconspicuous dominant flora, etc. Conducive to stable operation, promoting rapid enrichment and film formation, and improving controllability and stability

Inactive Publication Date: 2015-05-13
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problem of low microbial activity, complex community types, and indistinct dominant flora in the existing combined-type desulfurization and denitrification system, resulting in slow start-up speed, and the system is unstable and prone to collapse after start-up, resulting in repeated system start-up phases. For problems such as unstable removal effect, the present invention provides a method that can quickly and stably start a waste water nitrite-type concurrent desulfurization and denitrification system, which can achieve system stability, autotrophic and heterotrophic denitrification microorganisms synergize, and remove nitrogen efficiently and synchronously , carbon, sulfur purpose

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  • Method for rapidly and stably starting wastewater nitrite type mixotrophic desulfurization and denitrification system
  • Method for rapidly and stably starting wastewater nitrite type mixotrophic desulfurization and denitrification system
  • Method for rapidly and stably starting wastewater nitrite type mixotrophic desulfurization and denitrification system

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Embodiment 1

[0055] This embodiment is for NO 3 - and S 2- The organic waste water is treated to quickly start the concurrent biofilm system to verify the effect of the present invention. The anaerobic activated sludge is taken from the residual sludge return pipe of the secondary sedimentation tank of the northern sewage plant in Shenyang. This kind of sludge is located in the area Precipitation state, high concentration, strong activity, which is conducive to the rapid start-up of the system in the early stage. The filler used is a sponge block of 1cm×1cm×1cm. Compared with other kinds of fillers, this kind of filler has uniform pore size, large specific surface area, and rough surface, which is conducive to the rapid attachment and film formation of microorganisms. The specific operation is as follows:

[0056] The first step is to fully mix the high-concentration anaerobic activated sludge taken from the residual sludge return pipe of the secondary sedimentation tank of the northern...

Embodiment 2

[0062] In this embodiment, the anaerobic activated sludge is taken from the residual sludge return pipe of the secondary sedimentation tank of the northern Shenyang sewage plant, and a sponge block with a filler of 1 cm×1 cm×1 cm is used. The specific operation is as follows:

[0063] The first step is to fully mix the high-concentration anaerobic activated sludge with a 1cm×1cm×1cm sponge block and then put it into the upflow anaerobic reactor, and the NO 3 - and S 2- The inorganic wastewater is passed into the reactor to domesticate sulfur-autotrophic denitrification microorganisms, increase their activity and quantity, and NO 3 - The concentration of N is 87.5mg / L, S 2- The concentration of S is 300mg / L, and the process operating conditions are: pH value 7, temperature 35°C, 2L of water inflow every 24h, each time of water inflow is 2h, and the reflux of the effluent makes the rising flow rate in the reactor 2m / h , NO 3 - and S 2- Removal rates reached over 90% resp...

Embodiment 3

[0068] In this embodiment, the anaerobic activated sludge is taken from the residual sludge return pipe of the secondary sedimentation tank of the northern Shenyang sewage plant, and the filler is columnar activated carbon with a diameter of 2mm-4mm. The specific operation is as follows:

[0069] The first step is to fully mix the high-concentration anaerobic activated sludge with columnar activated carbon particles with a diameter of 2mm-4mm, and then put them into the upflow anaerobic reactor. 3 - and S 2- The inorganic wastewater is passed into the reactor to domesticate sulfur-autotrophic denitrification microorganisms, increase their activity and quantity, and NO 3 - The concentration of N is 30mg / L, S 2- The concentration of S is 100mg / L, and the process operating conditions are: PH value 9, temperature 30°C, 4L of water inflow every 24h, each time of water inflow is 0.5h, and the reflux of the effluent makes the rising flow rate in the reactor 0.5m / h, NO 3 - and...

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Abstract

The invention discloses a method for rapidly and stably starting a wastewater nitrite type mixotrophic desulfurization and denitrification system. The method comprises the following steps: controlling ecological factors in stages by virtue of a three-step method, respectively creating an anaerobic environment favorable for improving the activities of sulfur-autotrophic nitrate microbes, mixotrophic nitrate microbes and mixotrophic nitrite microbes, and promoting rapid formation of different functional floras, so that the complexity of the micro flora is reduced. According to the start method disclosed by the invention, stable operation of the desulfurization and denitrification process under high load conditions is promoted, the starting time is reduced, the stability of the system is enhanced, and after the system is started, the removal rate of sulfides and nitrite can rapidly reach 100 percent, the removal rate of the organic matters can be over 90 percent, the yield of elemental sulfur is high and is always over 80 percent, subsequent high-efficiency recovery of the elemental sulfur is promoted, and the wastes are recycled.

Description

technical field [0001] The invention relates to a fast and stable start-up method for a waste water treatment system, in particular to a start-up method for a waste water nitrite-type concurrent desulfurization and denitrification system. Background technique [0002] Wastewater containing ammonium nitrogen, nitrate, nitrite and sulfate continuously discharged by fermentation, pharmaceutical, chemical and other industries is one of the main sources of pollution that destroys the ecological balance of water bodies. In the context of deteriorating water environment, the discharge of this type of wastewater should be strictly controlled. Before that, it was better to carry out centralized and comprehensive treatment to save land resources, power resources and human resources. This has brought great challenges to the research of wastewater treatment technology. . [0003] The water quality of nitrogen- and sulfur-containing wastewater is complex and changeable. Traditional phys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34
CPCC02F3/2846C02F3/345C02F2101/101C02F2101/163C02F2101/166
Inventor 李巍梁霄林建国
Owner DALIAN MARITIME UNIVERSITY
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