Electrocatalytic biological aerated filter and wastewater aeration method

The technology of aeration biological filter and aeration method is applied in the field of electrocatalytic aeration biological filter and wastewater aeration, which can solve the problems of limited treatment degree of refractory industrial wastewater, incomplete treatment of refractory industrial wastewater, etc. To achieve the effect of improving the biodegradability of sewage and the complete treatment effect

Pending Publication Date: 2021-10-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide an electrocatalytic biological aerated filter and an aeration method for wastewater in order to overcome the problem of limited treatment of refractory industrial wastewater in the prior art, by using the electrocatalytic aerated biological The filter, which can integrate the three-dimensional electrode advanced oxidation technology and the biofilm technology, can effectively solve the problem of incomplete treatment of refractory industrial wastewater by traditional biochemical methods

Method used

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  • Electrocatalytic biological aerated filter and wastewater aeration method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Equipment condition:

[0099] Catalyst layer 2: The filler is filled with FCC waste catalyst. The filler is obtained by roasting FCC waste catalyst at 500°C to remove oil, then washing with demineralized water to remove salt, drying at 100°C and crushing to a specified particle size. ; Catalyst layer filler particle size 3-4mm.

[0100] Biological filler layer 3: The filler is filled with volcanic rock, the particle size of the volcanic rock is 2-3cm, and the density is 1.9-2.3g / cm 3 , specific surface area 8×10 4 -9×10 4 cm 2 / g, the filling porosity is 60%, and the intragranular porosity is 25%.

[0101] Physical filler layer 4: the filler is filled with pebbles, and the particle size of the pebbles is 4-6cm.

[0102] Multi-hole plate 5: the hole diameter is 2.5 cm.

[0103] Operating parameters:

[0104] Hydraulic retention time: biological filler layer 3h, catalyst layer 2h, air-water ratio (volume ratio) 5:1, plate spacing 10cm, current density 50mA / cm 2 ; ...

Embodiment 2

[0108] Equipment condition is identical with embodiment 1.

[0109] Operating parameters:

[0110] Hydraulic retention time: biological filler layer 3h, catalyst layer 2h, air-water ratio (volume ratio) 7:1, electrode plate spacing 5cm, current density 70mA / cm 2 ;

[0111] Raw water treatment: biochemical effluent from refined oil depot, COD: 119mg / L, petroleum 3mg / L;

[0112] Treated water: COD: 78mg / L, petroleum 0.5mg / L.

Embodiment 3

[0114] Equipment condition is identical with embodiment 1.

[0115] Operating parameters:

[0116] Hydraulic retention time: biological filler layer 3h, catalyst layer 2h, air-water ratio (volume ratio) 5:1, plate spacing 10cm, current density 50mA / cm 2 ;

[0117] Raw water treatment: biochemical effluent from refinery sewage treatment plant, COD: 123mg / L, BOD5: 28mg / L, ammonia nitrogen: 8mg / L, petroleum: 3mg / L;

[0118] Treated water: COD: 75mg / L, BOD5: 16mg / L, ammonia nitrogen: 2mg / L, petroleum: 0.9mg / L.

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Abstract

The invention relates to the field of sewage treatment, and discloses an electrocatalytic biological aerated filter and a wastewater aeration method. The electrocatalytic biological aerated filter comprises a tank body (1) of which the upper part is at least partially open; a support structure (5) which divides the tank body (1) into an upper space and a lower space and through which water can pass; a catalyst layer (2) which is arranged in the upper space; a biological filler layer (3) which is stacked with the catalyst layer (2) and arranged below the catalyst layer (2); an aeration unit (11) which is arranged in the lower space; and an electrode (6) which is arranged in the catalyst layer (2). By using the electrocatalytic biological aerated filter disclosed by the invention, a three-dimensional electrode advanced oxidation technology and a biological membrane technology can be integrated, and the problem that difficult-to-degrade industrial wastewater cannot be thoroughly treated by a traditional biochemical method can be effectively solved.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an electrocatalytic aerated biological filter and an aeration method for wastewater. Background technique [0002] The treatment of refractory industrial wastewater has always been a difficult problem in the field of sewage treatment. CN201620972914.9 discloses a sewage treatment system based on a two-stage biological aerated filter, which uses the microorganisms in the filter material layer and the filter material layer to adsorb, intercept and biodegrade the organic matter in the sewage, because this method cannot improve the sewage Biodegradability, so the degree of treatment of refractory industrial wastewater is limited. Contents of the invention [0003] The purpose of the present invention is to provide an electrocatalytic biological aerated filter and an aeration method for wastewater in order to overcome the problem of limited treatment of refractory industrial wastewa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00C02F3/06C02F3/10C02F101/30
CPCC02F3/005C02F3/06C02F3/107C02F3/104C02F2101/30Y02W10/10
Inventor 姚猛郭亚逢周志国唐晓丽卢薇
Owner CHINA PETROLEUM & CHEM CORP
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