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Two-stage membrane aerated bioreactor for deep sewage treatment

A technology of aerated organisms and membrane reactors, applied in biological water/sewage treatment, water/sludge/sewage treatment, water pollutants, etc., can solve insufficient ammonia oxidation activity, denitrification denitrification limitation, and ammonia nitrogen cannot be obtained Further oxidation and other problems, to achieve the effect of stable physiological function activity, low sludge output, and efficient sewage treatment benefits

Active Publication Date: 2017-11-24
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, MABR has not been used in the advanced treatment of domestic sewage, mainly because the ammonia oxidation activity of AOB in the oligotrophic environment of the secondary biochemical effluent is insufficient, which leads to the inability to further oxidize the ammonia nitrogen in the water body, and the subsequent denitrification denitrification is also difficult. correspondingly severely restricted

Method used

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  • Two-stage membrane aerated bioreactor for deep sewage treatment
  • Two-stage membrane aerated bioreactor for deep sewage treatment
  • Two-stage membrane aerated bioreactor for deep sewage treatment

Examples

Experimental program
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Effect test

Embodiment 1

[0072] 1) Structural composition and related parameters of the sewage treatment system: indicated by a two-stage MABR reactor figure 1 It can be seen that the system is composed of primary MABR and secondary MABR biochemical units. The structure of the two-level unit is according to the figure 2 The flow chart shown is created. PVDF hollow fiber dense membrane modules are used, with an outer diameter of 4.1 mm, an inner diameter of 2.2 mm, and a pore size of 0.05-0.06 μm; the volume of the membrane pool is different, the first level is 5 L, and the second level is 2 L; the effective membrane specific surface area is different, the first level is 450m 2 / m 3 , Level 2 200 m 2 / m 3 ; The formation process of biofilm is different: the biofilm of the first-level MABR device is formed by natural hanging film; the biofilm of the second-level MABR device is formed by artificial hanging film (see Section 2) and Section 3) for details).

[0073] 2) Process conditions: The sewage...

Embodiment 2

[0078] 1) Structural composition and related parameters of the sewage treatment system: indicated by a two-stage MABR reactor figure 1 It can be seen that the system is composed of primary MABR and secondary MABR biochemical units. The structure of the two-level unit is according to the figure 2 The flow chart shown is created. The PP hollow fiber dense membrane module is used, with an outer diameter of 3.7 mm, an inner diameter of 2.3 mm, and a pore size of 0.07-0.08 μm; the volume of the membrane pool is different, the first level is 6 L, and the second level is 2.5 L; the effective membrane specific surface area is different, the first level is 550m 2 / m 3 , Level 2 265 m 2 / m 3 ; The formation process of biofilm is different: the biofilm of the first-level MABR device is formed by natural hanging film; the biofilm of the second-level MABR device is formed by artificial hanging film (see Section 2) and Section 3) for details).

[0079] 2) Process conditions: Sewage c...

Embodiment 3

[0084] 1) Structural composition and related parameters of the sewage treatment system: indicated by a two-stage MABR reactor figure 1 It can be seen that the system is composed of primary MABR and secondary MABR biochemical units. The structure of the two-level unit is according to the figure 2 The flow chart shown is created. PTFE hollow fiber dense membrane modules are used, with an outer diameter of 3.8 mm, an inner diameter of 2.5 mm, and a pore diameter of 0.06 μm; the volume of the membrane pool is different, the first stage is 7 L, and the second stage is 3 L; the effective membrane specific surface area is different, the first stage is 600 m 2 / m 3 , Level 2 300 m 2 / m 3 ; The formation process of biofilm is different: the biofilm of the first-level MABR device is formed by natural hanging film; the biofilm of the second-level MABR device is formed by artificial hanging film (see Section 2) and Section 3) for details).

[0085] 2) Process conditions: Sewage come...

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Abstract

The invention discloses a two-stage membrane aerated bioreactor for deep sewage treatment. The two-stage membrane aerated bioreactor mabr comprises a buffer tank, a first-stage mabr device and a second-stage mabr device, wherein urban living sewage after physiochemical pretreatment is firstly fed into the buffer tank, is subjected to primary biochemical treatment by using the first-stage mabr device, and finally flows through the second-stage mabr device for deep treatment; the biological membrane of the first-stage mabr device is formed by using a natural membrane formation method and is used for treating high-load pollutants; the biological membrane of the second-stage mabr device is formed by using a manual membrane formation method and is used for treating low-load pollutants. Due to the two-stage mabr system, urban living sewage can be deeply treated, the problem that low-concentration organic matters, ammonia nitrogen, total nitrogen and the like cannot be further removed by using a single-stage mabr system is solved, and the two-stage mabr system is simple and convenient to operate, stable to operate, high in oxygen utilization rate, high in bioactivity, low in sludge yield and low in energy consumption.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment in environmental engineering, and in particular relates to a two-stage membrane aeration biofilm reactor for advanced treatment of sewage. Background technique [0002] Urban domestic sewage is widely distributed and is characterized by strong biodegradability and relatively stable concentrations of organic carbon and nitrogen pollutants. Discharge into the environment without effective treatment can easily cause eutrophication of water bodies and lead to algal blooms. At the same time, inorganic nitrogen pollutants such as NO 2 - and NO 3 - It can cause diseases such as human gastrointestinal cancer. Therefore, scientific treatment of urban domestic sewage has important environmental and social benefits. [0003] Inorganic nitrogen in sewage is generally treated by biochemical methods. Ammonia nitrogen is converted into nitrite nitrogen by ammonia oxidizing bacteria, nitrite nitrogen...

Claims

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Application Information

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IPC IPC(8): C02F3/10C02F3/34C02F101/16
CPCC02F3/109C02F3/34C02F2101/16C02F2203/006Y02W10/10
Inventor 田海龙张璐凡曲建航张贝贝李海峰李雪丽
Owner HENAN UNIVERSITY OF TECHNOLOGY
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