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System and method for performing advanced treatment of sewage through submerged ultrafiltration membrane

A technology of advanced treatment and ultrafiltration membrane, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high content of suspended matter and turbidity in effluent, and the system is not resistant to impact Problems such as effluent water quality and low retention rate of powdered activated carbon, to achieve the effect of less suspended matter, less dehydration facilities and better decolorization effect

Inactive Publication Date: 2016-02-24
HUBEI JUNJI WATER TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as: low filtration accuracy (generally 0.1-10 microns), resulting in low retention rate of powdered activated carbon; easy to block, high frequency of backwashing and large amount of backwashing water, resulting in high energy consumption for operation; content of suspended solids and turbidity in effluent Higher; in the case of large fluctuations in incoming water, the system is not resistant to impact, resulting in unstable water quality; the amount of carbon used is large, and the complete set of equipment occupies a large area

Method used

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  • System and method for performing advanced treatment of sewage through submerged ultrafiltration membrane
  • System and method for performing advanced treatment of sewage through submerged ultrafiltration membrane
  • System and method for performing advanced treatment of sewage through submerged ultrafiltration membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0048] The second-phase project of a large-scale printing and dyeing industrial park sewage treatment plant is 400,000 tons / day. It adopts water quality conditioning + delayed aeration technology, and the hydraulic retention time is 72 hours. The biochemical effluent is discharged after sedimentation in the secondary sedimentation tank. Bidding project, pilot scale 200m3 / d. The influent CODcr value is 160-180mg / L, the suspended matter is 70mg / L, and the chroma is 80 times.

[0049] The process equipment selection parameters are as follows:

[0050] (1) Carbon-water pre-mixing pool;

[0051] Dimensions: length, width, height 1.8m×0.8m×4.0m, hydraulic retention time 20min; return pipeline centrifugal pump, power 1.1kw; head 12m, flow 12m 3 / h; One DN40 electromagnetic flowmeter;

[0052] (2) No type ultrafiltration membrane separation tank;

[0053] Function: installed with curtain membrane 220m 2 , a perforated aeration tube is installed at the bottom to aerate and stir to...

Embodiment 2

[0082] The second-phase project of a sewage treatment plant in a large printing and dyeing industrial park is 400,000 tons per day. It adopts water quality conditioning + delayed aeration technology, and the hydraulic retention time is 72 hours. The tail water discharged by air flotation is used for advanced treatment and upgrading project, and the scale of pilot test is 200m3 / d. The influent CODcr value is 120mg / L, the suspended matter is 40mg / L, and the chromaticity is 60 times. The process equipment selection parameters are as follows:

[0083](1) Dosing amount of activated carbon: The average daily amount of carbon added is about 500mg / L.

[0084] (2) Carbon discharge: The carbon discharge frequency of the pilot project is once a day, 1 to 2 hours each time, the carbon discharge is about 3m3 / d, the concentration is 35g / L, and the carbon discharge and carbon addition are in balance.

[0085] (3) Carbon slurry circulation volume of C-UF system: 1.5 to 2 times of influent f...

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Abstract

The invention discloses a system and method for performing advanced treatment of sewage through a submerged ultrafiltration membrane. The system comprises a powder carbon mixing tank, a carbon and water pre-mixing pond, a submerged ultrafiltration membrane separation pond, an outflow water storage pond, a concentration precipitation pond and a pressing and filtering device. An external pressing type submerged membrane is arranged in the submerged ultrafiltration membrane separation pond, and the powder carbon mixing tank conveys powder active carbon to the submerged ultrafiltration membrane separation pond through a carbon adding pipe. Tail water of an industrial sewage treatment plant is conveyed into the carbon and water pre-mixing pond through a water inflow pipeline, and the tail water and carbon slurry flowing back through a return pipe in the submerged ultrafiltration membrane separation pond are subjected to carbon and water pre-mixing; part of water separated through the submerged ultrafiltration membrane separation pond is discharged through a water outflow pipe, and the other part of the water is stored in the outflow water storage pond; the carbon slurry in the carbon and water pre-mixing pond is conveyed into the concentration precipitation pond to be subjected to concentration and then is conveyed into the pressing and filtering device to be subjected to dewatering recovery. The sewage treatment technology is simple in technological process, high in automatic control degree, stable in treatment effect and capable of recycling active carbon for regeneration.

Description

technical field [0001] The invention belongs to the field of advanced sewage treatment, and relates to a system and method for advanced sewage treatment, in particular to a system and method for advanced sewage treatment that combine powdered activated carbon adsorption with submerged membrane separation. Background technique [0002] Industrial sewage has the characteristics of deep color, high COD concentration, and refractory degradation. It is still difficult to discharge industrial sewage up to standard after being treated by conventional biochemical and chemical precipitation methods, and it needs to be further treated by advanced treatment technology. However, the tail water discharged from industrial sewage treatment plants with conventional secondary biochemical and chemical precipitation treatment usually has characteristics such as difficult biochemical, difficult oxidation, and difficult flocculation, and traditional methods are difficult to achieve. Advanced ox...

Claims

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Application Information

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IPC IPC(8): C02F9/02
Inventor 刘鲁建董俊覃将伟聂忠文刘卫勇熊蔚方潇张双峰陈亮
Owner HUBEI JUNJI WATER TREATMENT