High road service area sewage water treating process and dynamic membrane bioreactor

A bioreactor, sewage treatment technology, applied in water/sewage multi-stage treatment, biological water/sewage treatment, water/sludge/sewage treatment, etc., can solve the problem of large area and poor resistance to water quality changes , large fluctuations in the concentration of suspended solids in the effluent, etc., to achieve the effect of ensuring stable and up-to-standard discharge

Active Publication Date: 2008-06-18
JIANGSU TRANSPORTATION RES INST CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After being treated by a sewage treatment device based on biological contact oxidation technology, ammonia nitrogen and phosphate cannot reach the standard stably
Ordinary A / O activated sludge method has the function of denitrification and dephosphorization, but the performance of resisting changes in water quantity and quality is poor
Both the biological contact oxidation method and the A / O method require units such as secondary sedimentation tanks, which occupy a large area and have large fluctuations in the concentration of suspended solids in the effluent

Method used

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  • High road service area sewage water treating process and dynamic membrane bioreactor
  • High road service area sewage water treating process and dynamic membrane bioreactor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] In the present invention, the sewage in the service area enters the dynamic membrane bioreactor after passing through the grid and adjusting the anaerobic tank, and then enters the artificial wetland for advanced treatment before being discharged.

[0021] The grille can adopt coarse grille or fine grille in ordinary grille or mechanical grille.

[0022] Adjust the anaerobic pool, which can be underground or semi-underground, with a volume of 0.8 to 1.0 times the daily sewage production in the service area. The adjustment anaerobic pool can be rectangular, with an aspect ratio of 2 to 5:1, and 0.2 to 0.5 of the effective volume of the adjusted anaerobic pool is the anaerobic zone. Stirring in the anaerobic zone can use submersible mechanical mixers, jet mixers or vertical mixers.

[0023] Sewage from the adjusted anaerobic tank is sent to the reaction zone of the dynamic membrane bioreactor with a submersible sewage pump or a sewage pump. The flow rate of the water pu...

Embodiment 2

[0027] Embodiment 2: Apply the present invention to transform the sewage treatment facilities in a certain expressway service area.

[0028] The sewage production volume in this service area is 150m 3 / d. The adjusted anaerobic pool used is 16.5m long, 5m wide, and the aspect ratio is 3.3:1. Adjust the effective volume of the anaerobic pool to 150m 3 , can adjust the amount of sewage in the service area for a day, and adjust the area of ​​the anaerobic pool to 82m 2 . The effective volume of the anaerobic tank is 50m 3 , accounting for 0.33 of the total effective volume of the regulated anaerobic tank. A single dynamic membrane bioreactor is 6m long, 3m wide and 2m high, and the total effective volume of the dynamic membrane bioreactor is 64m 3 , The effective water depth of the dynamic membrane bioreactor is 1.8m, which is 300mm higher than the upper part of the dynamic membrane module. There are 320 pieces of dynamic membrane modules in the dynamic membrane bioreactor...

Embodiment 3

[0030]The sewage in the service area flows into the regulating anaerobic pool by itself. The sewage is homogenized and acidified in the regulating anaerobic pond. At the same time, it is mixed with the mixed liquid that enters the regulating anaerobic pond through the mixed liquid return pipe of the 4 dynamic membrane bioreactors, and occurs in the regulating anaerobic pond. Anoxic denitrification reaction and anaerobic phosphorus release reaction; the sewage from the anaerobic tank is adjusted to enter the reaction zone of the 1 dynamic membrane bioreactor through the water inlet pipe, and the compressed air enters the dynamic membrane bioreactor through the 4 aeration pipe. The reaction zone of the reactor is aerated with oxygen, and the microorganisms undergo nitrification reaction and aerobic phosphorus absorption reaction in the reaction zone 1 of the dynamic membrane bioreactor. The activated sludge after the aerobic phosphorus absorption is concentrated in the 3 sludge zo...

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Abstract

The invention relates to a sewage treatment process for road service area and a device in the process, the process is combined with biological, ecological and chemical treatment process, the sewage passes through an adjusting anaerobic pond, a dynamic biological film reactor and an artificial wetland in order, the mixing liquid of the dynamic biological film reactor flows back to the adjusting anaerobic pond, the artificial wetland is added with functional fillings for removing nitrogen and dephosphorization, the process adopts for the characteristic that the sewage in the road service area has great variable water quality and water amount and high-concentration nitrogen phosphor contaminations, so as to reach the standard. In the process the dynamic biological film reactor is adopted as aerobic treatment device, the reaction area, the sludge area and the clean water area are integrated into a reactor, thereby adapting for compact terra use in road service area, simultaneously providing conditions for combing the device with the adjusting anaerobic pond and the artificial wetland.

Description

1. Technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a process for treating sewage in highway service areas and a dynamic membrane bioreactor for realizing the process. 2. Background technology [0002] The sewage in the road service area has the characteristics of small water volume, large fluctuations in water quality and water volume, and high nitrogen and phosphorus concentrations in sewage, among which the concentration of ammonia nitrogen can reach 100mg / L, and the concentration of phosphorus can reach 10mg / L. The concentration of ammonia nitrogen in ordinary domestic sewage is generally 20mg / L, and the concentration of phosphorus is generally 5mg / L. At present, the main processes of sewage treatment in highway service areas include biological contact oxidation method and anaerobic and aerobic alternating operation method (A / O method). After being treated by a sewage treatment plant based on biological ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F3/32C02F3/10
CPCY02W10/10
Inventor 傅大放聂荣马强李捷惠新周庆
Owner JIANGSU TRANSPORTATION RES INST CO LTD
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