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Electrocatalytic internal circulation biological aerated filter and wastewater aeration method
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A biological aerated filter and internal circulation technology, applied in chemical instruments and methods, electrochemical biological combined treatment, biological water/sewage treatment, etc. Complete and other problems to achieve the effect of improving the biodegradability of sewage and the complete treatment effect
Active Publication Date: 2021-10-19
CHINA PETROLEUM & CHEM CORP +1
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[0003] The purpose of the present invention is to provide an electrocatalytic internal circulation biological aerated filter in order to overcome the problem of limited treatment of refractory industrial wastewater in the prior art and wastewater aeration method, by using the electrocatalytic internal circulation biological aerated filter of the present invention, the three-dimensional electrode advanced oxidation technology and biofilm technology can be integrated, which can effectively solve the problem of traditional biochemical methods for refractory industrial wastewater treatment complete problem
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Embodiment 1
[0097] Equipment condition:
[0098] Catalyst layer 2: The filler uses γ-Al loaded with ceriumnitrate 2 o 3 , the active component content of the ball is 10% by mass; the particle diameter of the filler in the catalyst layer is 3-5mm.
[0099] 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%.
[0100] Physical filler layer 4: the filler is filled with pebbles, and the particle size of the pebbles is 4-6cm.
[0101] Multi-hole plate 5: the hole diameter is 2.5 cm.
[0102] Operating parameters:
[0103] Hydraulic retention time: biological filler layer 3h, catalyst layer 2h, air-water ratio (volume ratio) 8:1, reflux ratio 20, electrode plate spacing cm, current density 45mA / cm 2 ;
[0104] Raw water treatment: biochemical effluent from refined oil depot,...
Embodiment 2
[0107] Equipment condition is identical with embodiment 1.
[0108] Operating parameters:
[0109] Hydraulic retention time: biological filler layer 3h, catalyst layer 2h, air-water ratio (volume ratio) 12:1, reflux ratio 25, electrode plate spacing 5cm, current density 50mA / cm 2 ;
[0110] Raw water treatment: biochemical effluent from refined oil depot, COD: 117mg / L, petroleum 2.7mg / L;
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Abstract
The invention relates to the field of sewage treatment, and discloses an electrocatalytic internal circulation biological aerated filter and a wastewateraeration method. The electrocatalytic internal circulation biological aerated filter comprises: a tank body of which the upper part is at least partially open; a support structure which divides the tank body into an upper space and a lower space and through which water can pass; a catalyst layer which is arranged in the upper space; a biological filler layer which is stacked with the catalyst layer and is arranged below the catalyst layer; a guide cylinder which penetrates through the layers and is communicated with the lower space; an aeration unit which is arranged at the bottom of the guide cylinder; a water inlet unit which is arranged at the bottom of the tank body; and an electrode which is arranged in the catalyst layer. By using the electrocatalytic internal circulation biological aerated filter, 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 internal circulation 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 treatmentsystem 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 overcome the problem of limited treatment of refractory industrial wastewater in the prior art, to provide an electrocatalytic internal circulation aerated b...
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