Membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal

A technology of membrane bioreactor and biological phosphorus removal, which is applied in the field of membrane bioreactors for enhanced biological phosphorus removal and denitrification, can solve the problems of low nitrogen and phosphorus removal efficiency, achieve enhanced degradation ability, reduce inhibition, reduce The effect of footprint

Active Publication Date: 2014-03-26
CHONGQING UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Due to the combination of anaerobic tank-anoxic tank-aerobic tank and membrane bioreactor, on the one hand, the sludge settling performance in the reactor can not be affected by salinity, and on the other hand, it can overcome the si

Method used

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  • Membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal
  • Membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal
  • Membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal

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Embodiment

[0029] The main technical parameters are:

[0030] Total nitrogen load: 0.07~0.1 kgTN / (kgMLVSS·d)

[0031] Running time: the suction pump starts for 9 minutes and stops for 2 minutes

[0032] Hanging film density: 30%, 30%, 40% in anaerobic zone, anoxic zone, and aerobic zone, respectively

[0033] Dissolved oxygen: <0.5mg / L in anaerobic zone, 0.5~1.0mg / L in anoxic zone, 3~4mg / L in aerobic zone

[0034] Average hydraulic retention time: 1.5h in the anaerobic zone, 1.5-2.5h in the anoxic zone, and 8-9h in the aerobic zone

[0035] Construction parameters:

[0036] Effective water depth: 4 ~ 6m

[0037]The volume ratio of anaerobic zone, anoxic zone and aerobic zone is 1:2:5.

[0038] In this example, when the hydraulic load is optimal, the removal rates of COD, ammonia nitrogen, TN, soluble phosphate and SS are 91.67%, 90.61%, 68.46%, 40.54% and 98% respectively, compared with a single aerobic biofilm+ Membrane bioreactor is used to treat salty pickled mustard wastewat...

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Abstract

The invention discloses a membrane bio-reactor (MBR) used for treating preserved szechuan pickle wastewater and reinforcing biological phosphorous and nitrogen removal. An integrated reactor is formed by an A<2>/O process, a biological membrane process and the MBR. The MBR comprises an anaerobic tank, an anoxic tank, an aerobic tank, a feeding system, an aerating system, a drainage system and automatic control equipment, wherein semi-soft biological membrane fillers are put in the anaerobic tank, the anoxic tank and the aerobic tank; a membrane component is put in the aerobic tank, and a membrane separation region is not independently arranged. The reactor has the advantages that anaerobic phosphorus release and phosphorus accumulation in the aerobic tank are carried out via the sludge on the biological fillers in the anaerobic tank, thus increasing the total removal rate of phosphorus in the sewage; organic matters undergo hydrolytic acidification and organic nitrogen is aminated after the preserved szechuan pickle wastewater passes through the anaerobic tank; nitrification liquor in the aerobic tank flows back to the anoxic tank to form denitrification in the anoxic tank. The MBR has a simple structure and high pollutant treatment efficiency, is light in membrane pollution, and can simultaneously treat the pollutants such as organic matters, total nitrogen, total phosphorus, SS and the like of high salinity wastewater.

Description

technical field [0001] The invention belongs to the technical fields of sewage treatment and environmental protection, and in particular relates to a membrane bioreactor for intensifying biological phosphorus and nitrogen removal for treating high-salt, high-nitrogen and phosphorus pickled mustard wastewater. Background technique [0002] With the rapid economic development of the Three Gorges Reservoir area, the production scale of mustard mustard, a pillar industry, is getting larger and larger. During the production process, about 5 million cubic meters of untreated high-salt, high-nitrogen and phosphorus organic matter are discharged into the Three Gorges Reservoir area every year. Wastewater, that is, 22.25 million tons of pollutant organic matter (COD), 800,000 tons of nitrogen, and 130,000 tons of phosphorus discharged into the reservoir every year poses a serious threat to the water environment of the Three Gorges Reservoir area. The salinity of the wastewater produc...

Claims

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Application Information

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IPC IPC(8): C02F3/30C02F103/32
Inventor 柴宏祥何强周健艾南平廖宇
Owner CHONGQING UNIV
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