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A method for autotrophic denitrification of continuous flow urban sewage based on fna treatment of sludge

A technology for autotrophic denitrification and urban sewage, applied in runoff/rainwater treatment, chemical instruments and methods, biological water/sewage treatment, etc. The effect of low energy consumption and low oxygen demand

Active Publication Date: 2016-09-14
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0003] At present, the bottleneck restricting the application of anammox technology in urban sewage treatment plants is that the substrate nitrite of anaerobic ammonium oxidation reaction cannot get a stable supply

Method used

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  • A method for autotrophic denitrification of continuous flow urban sewage based on fna treatment of sludge

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and embodiment the present invention will be further described: as figure 1 As shown, the symbiosis of floc sludge and granular sludge to realize the autotrophic denitrification device of urban sewage consists of an urban sewage raw water tank (1), a reactor for removing organic matter (2), an intermediate sedimentation tank (3), an autotrophic denitrification reaction device (4), secondary settling tank (5), sludge treatment reactor (6); urban sewage raw water tank (1) is equipped with overflow pipe (1.1) and vent pipe (1.2); urban sewage raw water tank (1 ) is connected to the water inlet pipe of the organic matter removal reactor (2) through the water inlet pump (2.1); Gas head (2.3), air compressor (2.7), gas flow meter (2.6) and gas volume regulating valve (2.5); organic matter removal reactor (2) is connected to the intermediate sedimentation tank (3) through the intermediate sedimentation tank connecting pipe (2.4) ...

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Abstract

The invention discloses a method for realizing continuous-flow city sewage autotrophic nitrogen removal based on an FNA treatment of sludge. According to the invention, city sewage first enters an organic matter removing reactor, such that organic matters in the sewage are removed with a sludge absorption effect; discharged water enters an autotrophic nitrogen removing reactor, such that synchronous short-cut nitrification anaerobic ammonium oxidation autotrophic nitrogen removal is realized; sludge age is controlled by discharging residual sludge regularly everyday; active sludge is regularly treated by using free nitrous acid, such that nitrite oxidizing bacteria increase in the active sludge is controlled, and system stable short-cut nitrification is maintained; and continuous-flow city sewage autotrophic nitrogen removal is finally realized, and thus sludge treatment energy consumption is reduced.

Description

technical field [0001] The invention relates to a method for realizing autotrophic denitrification of continuous flow urban sewage based on FNA treatment of sludge, and belongs to the technical field of sewage biological treatment. Background technique [0002] The discovery of anammox bacteria changed people's understanding that ammonia can only be oxidized under aerobic conditions. The occurrence of anaerobic ammonium oxidation reaction makes it possible for sewage autotrophic denitrification, and has been successfully used in the denitrification treatment of high ammonia nitrogen sewage such as digested sludge dehydration liquid and landfill leachate in recent years. Compared with the traditional nitrification and denitrification denitrification technology, the oxygen demand of anammox autotrophic denitrification is low, so that the system energy consumption is low; no organic carbon source is required, so that the organic matter in the sewage can be used for methane prod...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/303C02F3/307C02F2103/001
Inventor 彭轶李冬张杰彭永臻
Owner BEIJING UNIV OF TECH
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