Device and method for deep denitrification of domestic sewage through combination of intermittent-aeration-mode simultaneous nitrification and denitrification with short-range denitrification-anaerobic ammonium oxidation

A technology for nitrifying anaerobic ammonia and simultaneous nitrification, which is applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. The effect of improving the removal rate of total nitrogen, solving the shortage of carbon source and improving the removal rate

Active Publication Date: 2018-12-18
BEIJING UNIV OF TECH
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Problems solved by technology

[0003] In terms of the mechanism of biological denitrification, in the conventional biological denitrification process, NH 4 + -N converted to NO 3 - -N and NO 2 - -N, and then heterotrophic denitrifying bacteria reduce nitrat

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  • Device and method for deep denitrification of domestic sewage through combination of intermittent-aeration-mode simultaneous nitrification and denitrification with short-range denitrification-anaerobic ammonium oxidation
  • Device and method for deep denitrification of domestic sewage through combination of intermittent-aeration-mode simultaneous nitrification and denitrification with short-range denitrification-anaerobic ammonium oxidation

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[0038] The patent of the present application is further described in conjunction with the accompanying drawings and examples: as figure 1 As shown, the present invention includes an excess sludge fermentation tank, a sludge fermentation liquid storage tank, a sewage water tank, an intermediate water tank, a first sequencing batch reactor, and a second sequencing batch reactor. The effective volumes of the six devices are 5L, 3L, 30L, 30L, 12L, and 12L respectively, among which the residual sludge fermentation tank, the sludge fermentation liquid storage tank and the sequencing batch reactor SBR are made of plexiglass; the intermediate water tank, sewage The water tank is made of organic plastic.

[0039] The device comprises that excess sludge is pumped into an excess sludge fermentation tank (2) through a first peristaltic pump (1), and a first agitator (3) and a first pH and DO controller are installed in the excess sludge fermentation tank (2). (4); The excess sludge ferme...

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Abstract

The invention provides a device and method for deep denitrification of domestic sewage through the combination of intermittent-aeration-mode simultaneous nitrification and denitrification with short-range denitrification anaerobic ammonium oxidation, belonging to the field of biological treatment of sewage. The device comprises an excess sludge fermentation cylinder, a sludge-water separator, a raw water tank, an intermediate water tank, two sequencing batch SBR reactors, an air compressor, a peristaltic pump, and the like. The method comprises the following steps: add domestic sewage into thefirst sequencing batch reactor, and removing all the ammonia nitrogen and the most of total nitrogen through simultaneous nitrification and denitrification in an intermittent aeration mode; and allowing discharge water of the previous step and sludge fermentation broth obtained after sludge-water separation to enter the second sequencing batch reactor, and removing left nitrite and nitrate nitrogen through coupled short-range denitrification-anaerobic ammonium oxidation so as to eventually realize deep denitrification of domestic sewage. The device and method of the invention are applicable to low-C/N urban domestic sewage, and can reduce aeration amount and energy consumption, homogenize the concentrations of organic matters in the domestic sewage, slow down the consumption speed of organic matters, improve nitrogen removal efficiency and realize recycling of excess sludge.

Description

technical field [0001] The invention relates to an optimization control technology for deep denitrification of domestic sewage by using intermittent aeration, synchronous nitrification and denitrification combined with short-range denitrification and anammox, and belongs to the field of biological treatment of urban domestic sewage. This process is suitable for the deep denitrification of low C / N urban domestic sewage. Background technique [0002] With the continuous growth of population and the continuous improvement of people's living standards, the per capita discharge of domestic sewage continues to increase, coupled with the widespread use of detergents, the nitrogen and phosphorus content in urban sewage is relatively high, and after being discharged into water bodies, the nitrogen and phosphorus in receiving water bodies An increase in the content will lead to eutrophication of the water body, damage the water body environment, and affect the water supply quality. I...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F101/16
CPCC02F3/302C02F2101/16
Inventor 彭永臻张文王思萌李夕耀
Owner BEIJING UNIV OF TECH
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