Chemicobiological flocculation treating method for urban sewage with suspending packing bed

A technology of chemical biology and urban sewage, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as long hydraulic retention time, complicated operation management, increased sludge addition, etc. problems, to achieve the effect of improving the utilization rate of oxygen and high mass transfer efficiency

Inactive Publication Date: 2003-06-18
TONGJI UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This is the most widely studied and applied biological nitrogen and phosphorus removal process. Its main structures include anoxic reactors, anaerobic reactors, and aerobic reactors. Research and actual engineering experience show that its nitrogen The removal effect of elements is good, and the ability to remove organic matter is very stable, but it has the following defects: (1) There are many pools, and a lot of connected pipes are added; (2) The hydraulic retention time is long, the treatment pool is large, and the infrastructure The cost is high, and the floor area is also increased; (3) There are many return systems, many and scattered equipment, complex operation and management, and high requirements for the quality of operators; (4) The treatment effect largely depends on the quality of the influent water, When the water quality fluctuates, the treatment effect cannot be guaranteed, and it is not resistant to impact load; (5) the energy consumption is high, which increases the operating cost; (6) the phosphorus removal effect is unstable, and the standard cannot be guaranteed
It creates anoxic, anaerobic and aerobic environments in time series to provide conditions for the growth of nitrogen and phosphorus removal microorganisms. Its a

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  • Chemicobiological flocculation treating method for urban sewage with suspending packing bed

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Experimental program
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Effect test

Embodiment 1

[0026] Pump urban sewage from a certain place into the chemical bioflocculation reactor, the amount of PAC added to the reactor is 8mg / l, the amount of PAM added is 0.5mg / l, and the hydraulic retention time is 30 minutes; the treatment from the chemical bioflocculation reactor Water enters the intermediate sedimentation tank, the sedimentation time is 1 hour, and the sediment produced is mixed sludge, part of which is refluxed to the reactor with a reflux ratio of 25%; the supernatant from the intermediate sedimentation tank enters the suspended packed bed reactor, The hydraulic retention time is 2.7 hours, the filler dosage rate is 38%, and the gas-water ratio is 4:1. The mixed solution from the suspended packed bed reactor enters the secondary settling tank, and the settling time is 1.5 hours. A suspended packed bed reactor with a reflux ratio of 28%.

[0027] After testing, when the water enters the COD Cr The average value is 200mg / l, the average value of water outlet is ...

Embodiment 2

[0029] The urban sewage in a certain place is pumped into the chemical bioflocculation reactor. The amount of PAC added in the reactor is less than 10mg / l, the amount of PAM added is 0.5mg / l, and the hydraulic retention time is about 30 minutes. The treated water enters the intermediate sedimentation tank, the sedimentation time is 1.2 hours, and the sediment produced is mixed sludge, part of which is refluxed to the reactor with a reflux ratio of 25%; the supernatant from the middle tank enters the suspended packed bed reactor, The hydraulic retention time is 2.5 hours, the filler dosage rate is 45%, and the gas-water ratio is 3:1. The mixed solution from the suspended packed bed reactor enters the secondary settling tank, and the settling time is 2 hours. The sediment part is refluxed to the A suspended packed bed reactor with a reflux ratio of 30%.

[0030] After testing: COD when entering water Cr The average value of TP is 221mg / l, the average value of water outlet is 56...

Embodiment 3

[0032]The urban sewage in a certain place is pumped into the chemical bioflocculation reactor. The amount of PAC added to the reactor is 6mg / l, the amount of PAM added is 0.5mg / l, and the hydraulic retention time is about 30 minutes. The water coming out of the chemical bioflocculation reactor The treated water enters the intermediate sedimentation tank, the sedimentation time is 2 hours, and the sediment produced is mixed sludge, part of which is refluxed to the reactor with a reflux ratio of 25%; the supernatant from the intermediate sedimentation tank enters the suspended packed bed reactor , the hydraulic retention time is 2.3 hours, the filler dosage rate is 55%, the air-water ratio of the suspended packed bed is 2.1:1, the mixed solution from the suspended packed bed reactor enters the secondary settling tank, the settling time is 2.2 hours, and the sediment part It is pumped back to the suspended packed bed reactor with a reflux ratio of 30%.

[0033] After testing: COD...

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Abstract

A process for treating the city sewage features the integration of chemobiotic flocculation integrated deeply for higher efficiency with suspension filler bed loaded by suspended particles as filler for higher microbe concentration in biochemical reactor. Its advantages are high effect, low cost and less possesses ground area.

Description

technical field [0001] The invention belongs to the technical field of environmental protection, and specifically relates to a chemical biological flocculation-a method for treating urban sewage with a suspended packing bed. Background technique [0002] With the continuous increase of the global population, the continuous development of society, and the continuous acceleration of urbanization, the growth rate of urban sewage volume is alarming. And because urban sewage contains a large amount of inorganic nutrients such as nitrogen and phosphorus, resulting in eutrophication of the receiving water. In the current treatment of urban sewage, the activated sludge method is absolutely dominant. The traditional activated sludge method does not have the function of nitrogen and phosphorus removal. Based on the theory of biological aerobic nitrification, anoxic denitrification and anaerobic phosphorus release, aerobic excess phosphorus uptake, a series of activated sludge for bio...

Claims

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Application Information

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IPC IPC(8): C02F9/02C02F9/14
Inventor 夏四清杨殿海高廷耀黄天寅
Owner TONGJI UNIV
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