Autotrophic denitrification/nitration denitrification and dephosphorization method for recycling coupling iron through organic matter of domestic sewage

A technology for autotrophic denitrification and domestic sewage, applied in chemical instruments and methods, biological water/sewage treatment, water pollutants, etc., can solve the problems of complex reaction process, high regeneration cost of saturated activated carbon, and drop of pH value of the system, etc. Achieve the effects of reducing pollutants, reducing operating costs, and broad application prospects

Inactive Publication Date: 2019-04-16
DONGHUA UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, in the actual use process, there is a problem of high regeneration cost of saturated activated carbon
Hydrothermal carbonization reaction is a typical exothermic process, which mainly reduces the content of O and H in raw materials through dehydration and decarboxylation reactions, but the specific reaction process is very complicated. At pre...

Method used

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  • Autotrophic denitrification/nitration denitrification and dephosphorization method for recycling coupling iron through organic matter of domestic sewage

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for recovering domestic sewage organic matter coupled with iron autotrophic denitrification / nitrification denitrification and phosphorus removal, the process of which is as follows figure 1 Shown:

[0028] (1) Put 3-5g of coconut shell charcoal into an adsorption tank filled with 1L of domestic sewage, stir for 3 hours at a speed of 120r / min, and the COD removal rate can reach more than 60%.

[0029] (2) Add the adsorbed activated carbon and water into the hydrothermal kettle, the filling rate is 50%, the hydrothermal temperature is 220°C, and the hydrothermal time is 4h. Put the obtained hydrothermal charcoal into the adsorption pool, and under the same conditions, the COD removal rate can reach more than 60%.

[0030] (3) Put the domestic sewage treated by activated carbon adsorption into the anoxic tank, add a sufficient amount of iron shavings as filler, and the hydraulic retention time is 4h.

[0031] (4) Pass the sewage discharged from the anoxic pool i...

Embodiment 2

[0034] A method for recovering domestic sewage organic matter coupled with iron autotrophic denitrification / nitrification denitrification and phosphorus removal, the process of which is as follows figure 1 Shown:

[0035] (1) Put 6-8g of coconut shell charcoal into an adsorption tank filled with 1L of domestic sewage, stir for 4 hours at a speed of 120r / min, and the COD removal rate can reach more than 80%.

[0036] (2) Add the adsorbed activated carbon and water into the hydrothermal kettle, the filling rate is 50%, the hydrothermal temperature is 220°C, and the hydrothermal time is 4h. Put the obtained hydrothermal charcoal into the adsorption pool, and under the same conditions, the COD removal rate can reach more than 80%.

[0037] (3) Put the domestic sewage treated by activated carbon adsorption into the anoxic tank, add a sufficient amount of iron shavings as filler, and the hydraulic retention time is 3h.

[0038] (4) Pass the sewage discharged from the anoxic pool i...

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Abstract

The invention discloses an autotrophic denitrification/nitration denitrification and dephosphorization method for recycling coupling iron through organic matter of domestic sewage. The method is characterized by comprising the steps that the organic matter in the domestic sewage is sufficiently absorbed by activated carbon; substances containing iron are put into an oxygen deprivation pond, and nitrate nitrogen, nitrite nitrogen and phosphorus in the sewage are removed; the activated carbon after adsorption is added to a water heating kettle for water heating treatment; ammoniacal nitrogen inthe sewage is converted into nitrate nitrogen and nitrite nitrogen through nitrifying bacteria; the water outlet part flows back to the oxygen deprivation pond, nitrate nitrogen and nitrite nitrogen are removed in the iron autotrophic denitrification process, and the other enters a secondary sedimentation pond for sedimentation; the water and sludge are discharged separately, and finally the effect of recycling, denitrifying and dephosphorizing the organic matter in the domestic sewage is achieved. According to the method, the operation cost is low, an external carbon source does not need to be added, the organic matter, total nitrogen and total phosphorus in the domestic sewage are efficiently removed, and through a water heating method, the organic matter in the sewage can be recycled, carbonized and recycled.

Description

technical field [0001] The invention relates to a method for recycling organic matter in domestic sewage coupled with iron autotrophic denitrification / nitrification denitrification and phosphorus removal, belonging to the field of sewage treatment. Background technique [0002] With the continuous acceleration of urbanization in my country in recent years, while the urban population has increased, the discharge of domestic sewage has also increased rapidly. The types of domestic sewage are complex. If they are discharged into natural water bodies without treatment or if the treatment is not up to standard, it will directly cause harm to the human health of residents and the natural environment. In order to realize the sustainable development of the urban construction process and ensure the health and safety of residents, it is necessary to do a good job in the treatment of domestic sewage. The "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB 18918-2002)...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F101/10C02F101/16
CPCC02F1/281C02F3/302C02F9/00C02F2001/007C02F2101/105C02F2101/16C02F2101/30C02F2301/08C02F2303/16
Inventor 钱雅洁谢昱薛罡潘哲伦高品陈红刘振鸿李响王麒李前刘祥
Owner DONGHUA UNIV
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