ORBAL oxidation ditch type similar dephosphorization denitrogenation integrated A2O technique

An oxidation ditch and denitrification technology, which is applied in the field of sewage treatment, can solve the problems of short residence time, long residence time, and large equipment footprint, and achieve low equipment investment costs, saving floor space, and small footprint Effect

Active Publication Date: 2008-05-28
LINGZHI ENVIRONMENTAL PROTECTION CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] A typical ORBAL oxidation ditch is composed of an outer ditch (anaerobic ditch), a middle ditch (anoxic ditch) and an inner ditch (aerobic ditch) in series. , High investment cost, in order to overcome the shortcomings of large floor area and high investment cost, Chinese patent CN200610038130. The secondary settling tank, the secondary settling tank is tangent to or shares the wall with the inner wall of the outer ditch
The typical ORBAL oxidation ditch has a good denitrification effect, but due to the long residence time (generally more than 16 hours), the phosphorus removal effect is not ideal. Anaerobic-aerobic process, the anoxic tank is in the outer ditch, the anaerobic tank is in the middle ditch, and the aerobic tank is in the inner ditch. Compared with

Method used

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  • ORBAL oxidation ditch type similar dephosphorization denitrogenation integrated A2O technique
  • ORBAL oxidation ditch type similar dephosphorization denitrogenation integrated A2O technique
  • ORBAL oxidation ditch type similar dephosphorization denitrogenation integrated A2O technique

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Embodiment 1

[0024] Example 1, ORBAL-like oxidation ditch integrated phosphorus and nitrogen removal A 2 O process, the sewage flows through the ORBAL oxidation ditch-like inner pool, middle ditch and outer ditch in turn, the inner pool is designed as anaerobic pool 3, the middle ditch is designed as anoxic pool 2, the outer ditch is designed as aerobic pool 1, and the aerobic A microporous aerator 9 is arranged in the pool 1, and the residence time in the anaerobic pool 3, the anoxic pool 2, and the aerobic pool 1 are respectively controlled to be 1-2 hours, 0.5-3 hours, and more than 7 hours. The underwater propeller 5 is used as push flow, and the sewage from the aerobic tank enters the secondary sedimentation tank 4 arranged outside the ORBAL oxidation ditch for biochemical treatment.

Embodiment 2

[0025] Embodiment 2, referring to Example 1, the inner tank is designed as anoxic tank 2, the middle ditch is designed as anaerobic tank 3, and the sewage is treated in the anoxic tank 2, anaerobic tank 3, aerobic tank 1, and secondary sedimentation tank 4. .

Embodiment 3

[0026] Example 3, with reference to Example 1, a central island partition wall 6 is placed in the middle of the inner ditch anaerobic pool 3 .

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Abstract

The invention relates to an A<2>O technique with the integration of dephosphorization and denitrification and is similar to an ORBAL oxidation ditch, and pertains to the technical field of sewage treatment. Sewage flows through an inner ditch/inner tank, a middle ditch and an external ditch in sequence and all the ditches are similar to the ORBAL oxidation ditch; the inner ditch/ inner tank is designed as an anaerobic tank or an anoxic tank; the middle ditch is designed as an anoxic tank or an anaerobic tank; the external ditch is designed as an aerobic tank. The technique combines the advantages of the ORBAL oxidation ditch, the A<2>O technique and a reversed A<2>O technique; compared with other common activated sludge methods, the invention can remove more phosphorus from the sewage, and has better dephosphorization and denitrification effect; the whole process has small area occupancy; integrated construction technique particularly can construct a secondary settling tank, reflux of nitrification and reflux of sludge in an integrate way; floor area is greatly saved by sharing walls, and investment capital for equipment is low.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, in particular to an ORBAL oxidation ditch-type integrated phosphorus and nitrogen removal designed with the help of ORBAL or a joint ORBAL oxidation ditch. 2 O craft. Background technique [0002] A typical ORBAL oxidation ditch is composed of an outer ditch (anaerobic ditch), a middle ditch (anoxic ditch) and an inner ditch (aerobic ditch) in series. , High investment cost, in order to overcome the shortcomings of large floor area and high investment cost, Chinese patent CN200610038130. The secondary settling tank, the secondary settling tank is tangent to or shares the wall with the inner wall of the outer ditch. The typical ORBAL oxidation ditch has a good denitrification effect, but due to the long residence time (generally more than 16 hours), the phosphorus removal effect is not ideal. Anaerobic-aerobic process, the anoxic tank is in the outer ditch, the anaerobic tank is in the...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 岑英凌建军
Owner LINGZHI ENVIRONMENTAL PROTECTION CO LTD
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