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Integrated sewage treating process in flocculant biological flow bed

A sewage treatment and fluidized bed technology, applied in the direction of flocculation/sedimentation water/sewage treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of insufficient denitrification carbon source, many equipment and structures, Problems such as complex process flow, to avoid insufficient denitrification carbon source, save land occupation, and achieve the effect of overall compact process

Inactive Publication Date: 2006-03-01
TONGJI UNIV
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Problems solved by technology

[0006] However, there is a defect in the technical progress of these combined processes, that is, they simply connect the primary intensification technology and the biological fluidized bed technology together, that is, the main structure is flocculation reaction tank-intermediate sedimentation tank + anoxic biological flow Bed-aerobic biological fluidized bed-secondary sedimentation tank does not really realize the organic coupling of these two technologies, so these combined processes often have the following disadvantages: (1) The process is complicated, with many equipment and structures, not simple enough ; (2) The one-level strengthening of the front section is easy to cause the problem of insufficient carbon source for denitrification in the biochemical reaction of the back section

Method used

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  • Integrated sewage treating process in flocculant biological flow bed

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Embodiment 1

[0025] The IC-MBBR process is used to treat domestic sewage in a township. After the floating matter is removed by the grid, the sewage enters the flocculation biological denitrification reaction tank. The coagulant is PAC, the flocculant is PAM, and the pipeline is added after the pump, and the pipeline mixer is mixed. The dosage of PAC is 30mg / L, and the dosage of PAM is 1mg / L. The hydraulic retention time of the flocculation biological denitrification reaction tank is 60 minutes, mechanical stirring is used for mixing, and the filling rate is 30%. The effluent enters the intermediate sedimentation tank, and the sedimentation time is 1 hour. 30% of the produced sediment is returned to the flocculation denitrification tank, and the rest is discharged as excess sludge, and the supernatant enters the aerobic biological fluidized bed. The hydraulic retention time of the aerobic biological fluidized bed is 4 hours, the filling rate is 40%, and the dissolved oxygen is controlled ...

Embodiment 2

[0027] IC-MBBR process is used to treat domestic sewage in a tourist area. After the floating matter is removed by the grid, the sewage enters the flocculation biological denitrification reaction tank. Aluminum sulfate is selected as the coagulant, and silica gel is selected as the flocculant, which is added in the pipeline behind the pump and mixed by mechanical stirring. The dosage of aluminum sulfate is 20mg / L, and the dosage of silica gel is 0.5mg / L. The hydraulic retention time of the flocculation denitrification reaction tank is 60 minutes, mechanical stirring is used for mixing, and the filler dosage rate is 30%. The effluent enters the intermediate sedimentation tank, and the sedimentation time is 1 hour. The resulting sediment is discharged as sludge, and the supernatant enters the aerobic biological fluidized bed reaction tank. The hydraulic retention time of the aerobic biological fluidized bed is 3 hours, the filling rate is 40%, and the gas-water ratio is 4:1. 8...

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Abstract

The present invention belongs to the field of environment protecting technology, and is especially one kind of integrated sewage treating process in flocculant biological flow bed. The present invention integrates the first stage reinforcing technology and biological flow bed technology, and has flocculating biological denitrogenating reaction pond with thrown suspended stuffing for denitrifying bacteria to coagulate and grow on, and aerobic biological flow bed with outgoing water to flow back over the intermediate precipitation pond, to realize the chemical flocculation and denitrifying biological denitrogenating in the same reactor. The present invention realizes the organic combination of two said technologies, and has reduced building number, simple and compact technological process, and high sewage treating efficiency.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and in particular relates to an integrated flocculation biological fluidized bed sewage treatment process (Incorporated Coagulation-Moving Bed Biological Reactor, IC-MBBR). Background technique [0002] Improving the removal efficiency of the sewage treatment process and reducing the footprint of the sewage treatment process has always been a hot spot in the field of sewage treatment. Among the many research results, primary intensification technology and biological fluidized bed technology have attracted much attention at home and abroad because they are more effective and applicable. [0003] The primary enhancement technology is the enhancement of the traditional process in the primary treatment unit, including two types of methods: (1) Chemical Enhanced Primary Treatment (CEPT), the main structure is the flocculation reaction tank-sedimentation tank. It sets up a flocculatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F1/52C02F3/30
Inventor 王晟徐祖信
Owner TONGJI UNIV
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