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A metal double membrane bioreactor for sewage treatment

A membrane bioreactor, bioreactor technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the treatment cost and operation scale limit non-woven membrane bioreaction To achieve good pollutant removal effect, alleviate membrane fouling, and good degradation effect

Active Publication Date: 2015-10-28
中国建筑东北设计研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase in processing costs and the expansion of the scale of operation have limited the development of non-woven membrane bioreactors.
At present, there is no report on the combination of non-woven membrane bioreactor and metal iron to improve the sewage treatment effect and reduce the pollution of non-woven membrane

Method used

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  • A metal double membrane bioreactor for sewage treatment
  • A metal double membrane bioreactor for sewage treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The car wash of a chemical transportation company produces an average of 150 cubic meters of waste water for washing outside the car every day. The main pollution indicators are shown in Table 1.

[0019] Table 1 Characteristics of water quality indicators for washing wastewater outside the vehicle

[0020] index pH COD (mg / L) SS (mg / L) Oil (mg / L) waste water 7.3 156 1329 20

[0021] Because the actual car wash wastewater has high turbidity and contains some solids with larger particles. The results of the suspended solids settling experiment were as follows: figure 2 As shown, the settling characteristics of suspended solids in wastewater from vehicle flushing.

[0022] It can be seen that the sedimentation performance of suspended solids in wastewater is good, and after 6 minutes of sedimentation, the removal rate of suspended solids (medium-speed quantitative filter paper filtration) can reach 80%. Therefore, firstly, the primary se...

Embodiment 2

[0027] In a printing and dyeing wastewater treatment plant of an enterprise, the COD value of the treated effluent is 100-120mg / L, and the current new standard requires it to be below 60mg / L. Ozone + biological activated carbon, Fenton reagent method, activated carbon adsorption and other processes have been used for advanced treatment, but the results are not satisfactory, or the investment and operation costs are unacceptable.

[0028] Using metal iron-double-layer non-woven membrane bioreactor, the design water flux is 40L / m2.h. After running for a period of time, the system treatment effect is stable, and the system effluent COD can meet the treatment requirements, and sometimes the effluent COD value can be less than 30mg / L.

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Abstract

The invention provides a metal double-layered membrane bioreactor for sewage treating, and relates to a sewage treatment device. The metal double-layered membrane bioreactor is characterized in that a sewage tank (1) is connected with a water inlet pump (2) through a pipeline, the pump outlet of the water inlet pump (2) is communicated with an aerobic zone (5) of a membrane bioreactor (6), and a pH modifier (8) and reduced iron powder (9) are added into the aerobic zone (5); meanwhile, air is discharged into the aerobic zone (5) by an air pump (3) through a pipeline, an anoxic zone (4) is formed between an inner pocket and an outer pocket of the membrane bioreactor (6), and a water outlet body (7) is communicated with the outer pocket of the membrane bioreactor (6). According to the metal double-layered membrane bioreactor for sewagetreating, the removal effect of organic matters difficult to be biologically degraded in the sewage can be improved, the floc structure of microbes and the non-woven fabric membrane surface quality can be improved, and the pollution speed of the non-woven fabric membrane in the membrane bioreactor is reduced; under the condition of gravity flow, the water flux of membrane materials is increased, so that the long-term stable operation can be realized, and the metal double-layered membrane bioreactor is suitable for projects of small and medium-sized water amount sewage recycling; meanwhile, the investment and the working expenses are low, the effluent quality is good, and the operation is simple.

Description

technical field [0001] The invention relates to a sewage processor, in particular to a metal double-layer membrane bioreactor for treating sewage. Background technique [0002] Membrane bioreactor (MBR) has the incomparable advantages of traditional treatment processes such as good effluent quality, small footprint, high pollutant removal rate and small amount of residual sludge. However, the high price of membrane materials and serious membrane fouling restrict the development of this process. It is necessary to develop inexpensive macroporous membrane materials to reduce membrane costs, reduce operating pressure, and improve the economics of MBR wastewater treatment. In recent years, some researchers have attempted to replace traditional membrane materials with non-woven fabrics and apply them in the MBR sewage treatment process. However, non-woven fabrics have the disadvantages of rough surface, large pore size, strong hydrophobicity, and prone to membrane fouling. There...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 金鹏张爱华齐悦张文启何月玲
Owner 中国建筑东北设计研究院有限公司
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