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Process for treating sewage by using annular circulating flow membrane bioreactor

A membrane bioreactor, membrane biological reaction technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, aerobic and anaerobic process treatment, etc. problems, to achieve the effect of flexible operation mode, expansion of optional space, and uniform space distribution

Active Publication Date: 2014-02-12
四川蓉信开工程设计有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the actual application process, the energy consumption of MBR is relatively high, and for typical urban sewage treatment, it is even more than twice that of the traditional A / O process, thus forming a huge obstacle to the popularization and use of this technology

Method used

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  • Process for treating sewage by using annular circulating flow membrane bioreactor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] use as figure 1 A circulating flow loop membrane bioreactor (CCFP-MBR) and sewage treatment process shown in the figure treat 10,000m 3 / d domestic sewage.

[0072] Design water quality:

[0073] COD cr 400mg / L; NH 3 -N40mg / L; TP3mg / L; SS180mg / L

[0074] Outlet water quality requirements: meet the first-class A standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

[0075] The relevant design parameters are as follows: average inflow flow rate 416.67m 3 / h; maximum flow 658.33m 3 / h; the design anaerobic zone 1 mixed liquid suspended solids concentration MLSS is 2600mg / L (actual operation can be 2000~3000mg / L), anoxic zone 2 mixed liquid suspended solids concentration MLSS is 5650mg / L (actual operation can be 4800 mg / L) ~6000mg / L), the MLSS of mixed liquid suspension in aerobic zone 3 is 7000mg / L (actual operation can be 7000~9000mg / L); the maximum sludge load in aerobic zone 3 is 0.13kgBOD 5 / kgMLSS·d; the hydraulic r...

Embodiment 2

[0080] use as figure 1 A circulating flow loop membrane bioreactor (CCFP-MBR) and sewage treatment process shown in the figure treat 5000m 3 / d domestic sewage.

[0081] Design water quality:

[0082] COD cr 350mg / L; NH 3 -N35mg / L; TP4mg / L; SS200mg / L

[0083] Outlet water quality requirements: meet the first-class A standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

[0084] The relevant design parameters are as follows: the average flow rate of influent water is 208.33m 3 / h; maximum flow 362.50m 3 / h; design anaerobic zone 1 mixed liquid suspended solids concentration MLSS is 3000mg / L (actual operation can be 2000~3000mg / L), design anoxic zone 2 mixed liquid suspended solids concentration MLSS is 6000mg / L (actual operation can be according to 4500~6000mg / L), the design aerobic zone 3 mixed liquid suspension concentration MLSS is 8000mg / L (actual operation can be 7500~9000mg / L); the maximum sludge load of aerobic zone 3 is...

Embodiment 3

[0089] use as figure 1 A circulating flow loop membrane bioreactor (CCFP-MBR) and sewage treatment process shown in the figure treat 30,000m 3 / d domestic sewage.

[0090] Design water quality:

[0091] COD cr 450mg / L; NH 3 -N40mg / L; TP4mg / L; SS200mg / L

[0092] Outlet water quality requirements: meet the first-class A standard in the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002).

[0093] The relevant design parameters are as follows: the average flow rate of influent water is 1250m 3 / h; maximum flow 1812.50m 3 / h; design anaerobic zone 1 mixed liquid suspended solids concentration MLSS is 2000mg / L (actual operation can be 1800~3000mg / L), design anoxic zone 2 mixed liquid suspended solids concentration MLSS is 6000mg / L (actual operation can be according to 4800~6000mg / L), the design aerobic zone 3 mixed liquid suspension concentration MLSS is 8000mg / L (actual operation can be 7500~9000mg / L); the maximum sludge load of aerobic zone 3 i...

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Abstract

The invention relates to a process for treating sewage by using an annular circulating flow membrane bioreactor. The sewage is treated by using the annular circulating flow membrane bioreactor; the annular circulating flow membrane bioreactor comprises an anaerobic zone, an anoxic zone, an aerobic zone and a membrane bioreaction zone which are sequentially arranged, wherein the membrane bioreaction zone is arranged in the aerobic zone; the sewage is sequentially treated through the anaerobic zone, the anoxic zone, the aerobic zone and the membrane bioreaction zone and reflows from the membrane bioreaction zone to the aerobic zone, from the aerobic zone to the anoxic zone and from the anoxic zone to the anaerobic zone, so that the higher sludge concentration is kept in the whole reactor. Through the optimized combination of the reactor, the process for treating sewage by using the annular circulating flow membrane bioreactor has the advantages of greatly improving the flexibility of a system, remarkably reducing the engineering investment and reducing the energy consumption.

Description

technical field [0001] The invention relates to a sewage treatment process of a circulating flow ring type membrane bioreactor, belonging to the technical field of organic sewage treatment. Background technique [0002] In the continuous flow denitrification and phosphorus removal process, the current membrane bioreactor (MBR, refers to the combination of biological reaction and membrane separation, using membrane as the separation medium instead of conventional gravity precipitation solid-liquid separation to obtain effluent, and can change the reaction process and improve Sewage treatment method with high reaction efficiency) has broad development prospects because of its simple process, high treatment efficiency, land saving, and superior effluent quality. [0003] According to the process type, MBR process can be divided into submerged membrane biological treatment system (Immersed membrane biological treatment system, referred to as S-MBR) and external membrane biologic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/34
Inventor 张大鹏刘鸣燕叶方清李晖
Owner 四川蓉信开工程设计有限公司
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