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
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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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