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DEAMOX (denitrifying ammonium oxidation) based efficient biological nitrogen and phosphors removal device adopting improved A/O (anoxic/oxic) four-point step-feeding as well as application method

A segmented water intake and biological denitrification technology, which is applied in the direction of water pollutants, chemical instruments and methods, biological water/sewage treatment, etc., to achieve the effects of saving organic carbon sources, improving removal efficiency, and ensuring high efficiency

Active Publication Date: 2016-07-13
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the setting of the pre-anoxic reaction zone 2, the NO carried by the return sludge in the traditional single sludge system can be effectively solved. 3 - Simultaneous competition for carbon source with anaerobic phosphorus release by phosphorus accumulating bacteria

Method used

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  • DEAMOX (denitrifying ammonium oxidation) based efficient biological nitrogen and phosphors removal device adopting improved A/O (anoxic/oxic) four-point step-feeding as well as application method

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specific Embodiment approach 1

[0025] Specific implementation mode one: combine figure 1 As shown, a DEAMOX-based improved A / O four-point water-inflow high-efficiency biological denitrification and phosphorus removal device constructed in this embodiment includes urban sewage raw water tank 1, pre-anoxic reaction zone 2, and anaerobic reaction zone connected in sequence 3. The first aerobic reaction zone 4, the first anoxic reaction zone 5, the second aerobic reaction zone 6, the second anoxic reaction zone 7, the third aerobic reaction zone 8, and the sedimentation tank 9 , the outlet pipe 10, and the sludge return pipeline from the bottom of the sedimentation tank to the pre-anoxic zone; the pre-anoxic reaction zone 2, the anaerobic reaction zone 3, the first aerobic reaction zone 4, the Section anoxic reaction zone 5, the second section aerobic reaction zone 6, the second section anoxic reaction zone 7, and the third section aerobic reaction zone 8 are all communicated with a partition with a connecting ...

specific Embodiment approach 2

[0026] Specific implementation mode 2: This implementation mode is based on the application method of DEAMOX's improved A / O four-point water-inflow high-efficiency biological denitrification and phosphorus removal device, which is carried out according to the following steps:

[0027] (1) Take the activated sludge from the secondary settling tank of the urban sewage treatment plant and inoculate it in the improved A / O four-point subsection water inlet reactor, and the sludge concentration after adding MLSS = 3000 ~ 4000mg / L; inoculate the sponge filler in the second stage The filling ratio of the first anoxic reaction zone and the second anoxic reaction zone is 30-50%, and then the function of the traditional anoxic reaction zone is changed from a single denitrification to a short-range denitrification combined with anaerobic Ammonia oxidation denitrification ammonia oxidation;

[0028] (2) Urban sewage from low-carbon sources enters the pre-anoxic reaction zone, the anaerobic...

Embodiment

[0032] combine figure 1 As shown, the application method of the improved A / O four-point water-inflow high-efficiency biological nitrogen and phosphorus removal device based on DEAMOX is carried out according to the following steps:

[0033] (1) Take the activated sludge from the secondary settling tank of the urban sewage treatment plant and inoculate it in the improved A / O four-point subsection water inlet reactor, and the sludge concentration MLSS after adding is 3000-4000mg / L; the sponge filler is inoculated in the second stage One anoxic reaction zone and the second anoxic reaction zone, and then change the function of the traditional anoxic reaction zone, changing it from a single denitrification to short-range denitrification combined with anammox denitrification and ammonium oxidation;

[0034] (2) Urban sewage from low-carbon sources enters the pre-anoxic reaction zone, the anaerobic reaction zone, the first anoxic reaction zone and the second anoxic reaction zone sequ...

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Abstract

The invention discloses a DEAMOX (denitrifying ammonium oxidation) based efficient biological nitrogen and phosphors removal device adopting improved A / O (anoxic / oxic) four-point step-feeding as well as an application method of the device, and belongs to the technical field of biological sewage treatment. The DEAMOX technology is realized in an anoxic area of the A / O step-feeding technology, a traditional high carbon source dependency type DEAMOX mode is changed into a low carbon source dependency type nitrogen removal mode with combination of short-cut denitrification and anaerobic ammonium oxidation, and meanwhile, a pre-anoxic area is set, so that the influence of NO3<-> carried by return sludge on anaerobic phosphorus release is eliminated and high efficiency of nitrogen and phosphorus removal during treatment of low carbon source urban sewage with the technology is guaranteed. The device adopting the technology comprises an urban sewage raw-water tank, a pre-anoxic area, an anaerobic area, a first section of oxic area, a first section of anoxic area, a second section of oxic area, a second section of anoxic area, a third section of oxic area, a sedimentation tank and a water outlet pipe sequentially in the water-flow direction, wherein sponge filler is arranged in the first section of anoxic area and the second section of anoxic area, so that a DEAMOX reaction is realized for nitrogen removal. The device and the application method thereof have the advantages of low carbon source dosage, low aeration energy consumption and low operation cost.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and specifically relates to a device and application method for biological phosphorus removal and autotrophic denitrification of low-carbon source urban sewage treated by an improved A / O four-point segmental water inflow process based on DEAMOX, which is suitable for newly built cities Sewage treatment plants and the upgrading and transformation of existing urban sewage treatment plants and other technical fields. Background technique [0002] The continuous-flow segmented influent anoxic / aerobic (A / O) process is an efficient process for biological denitrification of sewage. Raw water enters the system at multiple points, which can save the return facilities of the nitrification liquid, and make full use of the organic carbon source in the raw water for denitrification, saving the cost of chemicals. In addition, the multi-point water intake makes the system's demand for dissol...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/307C02F3/308C02F2101/16C02F2209/08C02F2209/16C02F2209/18
Inventor 彭永臻马琳娜马斌王淑莹
Owner BEIJING UNIV OF TECH
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