Capacity enlarging design and calculation method for sewage water treatment factory adopting A/O type biological aeration

A biological aeration filter, sewage treatment plant technology, applied in the direction of water/sewage multi-stage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., can solve the problem of no tertiary treatment expansion design calculation Methods and other issues

Inactive Publication Date: 2006-07-12
甘肃金桥给水排水设计与工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, at present, the A / O type biological aerated filter is used for the expansion of the tertiary treatment in the existing urban sewage treatment plant, and there is no design and calculation method for the expansion of the tertiary treatment for design.

Method used

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  • Capacity enlarging design and calculation method for sewage water treatment factory adopting A/O type biological aeration
  • Capacity enlarging design and calculation method for sewage water treatment factory adopting A/O type biological aeration
  • Capacity enlarging design and calculation method for sewage water treatment factory adopting A/O type biological aeration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] An urban sewage treatment plant with a treatment capacity of 20,000 m 3 / d. The effluent quality does not meet the new discharge standards. It is required to use A / O type biological aeration filter for expansion, calculate the main design parameters of the process, and give the water quality indicators of secondary settling tank 1, primary settling tank 2 and after expansion are as follows:

[0048] (1) a. Determination of the water quality C of the effluent from the secondary sedimentation tank 1 1，COD =50mg / L; C 1，BOD5 =20mg / L; C 1，TN =28 mg / L; C 1NH3-N =18 mg / L; C 1，NOX-N =8mg / L: C 1，SS = 30 mg / L.

[0049] b. Determination of the water quality of the primary sedimentation tank 2: C 2，COD =220mg / L; C 2，BOD5 =110 mg / L; C 2，TN = 35 mg / L; C 2，NH3-N =30mg / L; C 2，NOX-N =1 mg / L; C 2，SS = 80 mg / L.

[0050] c. The discharge standard that needs to be met is the first-class B standard in the "Pollution Discharge Standard for Urban Sewage Treatment Plants", C 3，CO...

Embodiment 2

[0114] An urban sewage treatment plant with a treatment capacity of 10,000 m 3 / d. The effluent water quality does not meet the requirements of the new discharge standard, and A / O type biological aeration filter is required to expand the capacity, calculate the main design parameters of the process, and give the secondary sedimentation tank 1, primary sedimentation tank 2 and water quality indicators after expansion as follows:

[0115] Secondary sedimentation tank effluent water quality: C 1，COD = 45 mg / L; C 1，TN =28 mg / L; C 1NH3-N =12 mg / L; C 1，NOX-N =14 mg / L; C 1，SS = 30 mg / L.

[0116] Primary sedimentation tank effluent water quality C 2，COD =275mg / L; C 2，TN =34mg / L; C 2，NH3-N =28 mg / L; C 2，NOX-N =1 mg / L; C 2，SS = 80 mg / L.

[0117] Discharge standard "Pollution Discharge Standards for Urban Sewage Treatment Plants", Class I B standard,

[0118] C 3，COD =60mg / L; C 3，TN =20mg / L; C 3NH3-N =8 mg / L; C 3，BOD5 =20mg / L; C 3，SS = 30 mg / L.

[0119] Known character...

Embodiment 3

[0178] An urban sewage treatment plant with a treatment capacity of 30,000 m3 3 / d. The effluent water quality does not meet the requirements of the new discharge standard, and A / O type biological aeration filter is required to expand the capacity. The main design parameters of the process are calculated, and the water quality indicators of the secondary settling tank, primary settling tank and the expanded capacity are given as follows:

[0179] Secondary sedimentation tank effluent water quality: C 1，COD =80mg / L; C 1，BOD5 =30mg / L; C 1，TN =26mg / L; C 1NH3-N =20mg / L; C 1，NOX-N = 4 mg / L; C 1，SS = 40 mg / L.

[0180] Primary sedimentation tank effluent water quality: C 2，COD =275mg / L; C 1，BOD5 =30mg / L; C 2，BOD5 =150mg / L; C 2，TN =32 mg / L; C 2，NH3-N =27mg / L; C 2，NOX-N =1 mg / L; C 2，SS = 80 mg / L.

[0181] Class I B standard in "Pollution Discharge Standards for Urban Sewage Treatment Plants": C 3，COD =60mg / L; C 3，TN =20mg / L; C 3NH3-N =8 mg / L; C 3，BOD5 =20mg / L; C 3，SS...

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Abstract

The invention relates to a design calculation method of enlarging volume of the sewage plant. A design calculation method of using A/O type bio-aeration filter to enlarge the volume of said sewage plant, including one-level effluent-handling prime settling pool (2), second-level effluent-handling second settling pool, whose main feature is: set water-intake balancing tank (4) on water-outlet end of said second settling pool (1), connect the tertiary sewage treatment A/O type bio-aeration filter (3) to water-intake balancing tank (4). The invention requires the quality of outlet-water completely after enlarging the volume on the base of present outlet-water quantity of second settling tank and the quality of second settling tank, prime settling tank, calculates some main design parameters such as: outlet-water quantity of said introduced prime settling tank, outlet-water circulating mass, volume of anoxybiotic section, volume of aerobic section, etc. The invention is characterized by: precise calculating method, reliable parameters, A/O type bio-aeration filer applied to the design calculation of enlarging volume of tertiary treatment of present urban sewage plant.

Description

Technical field: [0001] The invention mainly relates to a design and calculation method for capacity expansion of a sewage treatment plant. Background technique: [0002] The meaning of urban sewage treatment plant expansion means that the treatment water volume of the existing urban sewage treatment plant has reached the original design water volume, but the water inflow is still increasing, the capacity of the existing treatment equipment can no longer meet the requirements, and technical transformation and expansion are needed ; or due to various reasons, the effluent quality of the existing urban sewage treatment plants does not meet the requirements of the discharge standard, and it is necessary to carry out technical transformation on the existing treatment process or add some treatment equipment to improve the effluent water quality; or both. [0003] With the development of society, the urban population and industrial production, the corresponding amount of urban sew...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30C02F1/52G06F17/50
Inventor 邱熔处王刚
Owner 甘肃金桥给水排水设计与工程有限公司
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