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Advanced oxidation coupling biological cleaning system based on ozone regulation and application thereof

A biological purification and advanced oxidation technology, applied in the field of environmental pollution purification, can solve the problems of not realizing the important role of ozone, not paying attention to the effect of ozone, etc., and achieve the effect of thorough purification and high biological activity

Active Publication Date: 2018-06-22
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The existing advanced oxidation coupled biological purification process did not pay attention to the effect of ozone on the subsequent biological purification process, but only used the strong oxidation of advanced oxidation to couple the two units, and did not realize the importance of ozone in the coupling process of the two effect

Method used

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  • Advanced oxidation coupling biological cleaning system based on ozone regulation and application thereof
  • Advanced oxidation coupling biological cleaning system based on ozone regulation and application thereof
  • Advanced oxidation coupling biological cleaning system based on ozone regulation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: preparation of copper-manganese composite catalyst

[0041] Mass loading 20% ​​CuO / MnO 2 Composite catalyst: take MnCO 3 Placed in a muffle furnace and calcined at 400°C for 6 hours to obtain MnO 2 spare. Take 0.2g of Cu(NO 3 ) 2 ·3H 2 O, dissolved in 6mL of deionized water, weighed 1gMnO 2 Add while stirring, dry at 80°C for 12h, calcinate at 400°C for 3h, and take it out after cooling to obtain CuO / MnO with a mass fraction of 20%. 2 Composite catalyst 1.10g.

[0042] For 20% CuO / MnO 2 The composite catalysts were structurally characterized. XRD analysis shows that the existence form of copper in the sample is CuO monoclinic system, and its diffraction peak is sharp, indicating that its crystallinity is good, the crystal phase content is high and the grain is large, and the existence form of manganese is β-MnO 2 and Mn 2 o 3 mixed phase. BET analysis showed that the specific surface area and pore volume of the catalyst were 34.96m 2 / g and 0.1...

Embodiment 2

[0044] Example 2: O in low temperature plasma synergistic catalytic process 3 Production

[0045] refer to figure 2 Middle b, the low-temperature plasma synergistic catalytic device is a tube body (diameter 8cm, length 40cm), with a first exhaust gas inlet 7 and a first exhaust gas outlet 11, from the first exhaust gas inlet 7 to the first exhaust gas outlet 11 along the axial direction A gas buffer zone 8, a plasma discharge area 9 and a catalyst placement area 10 are set; in the plasma discharge area, a quartz tube is used as a discharge medium, a stainless steel iron rod is used as an inner electrode, and a dielectric barrier discharge is adopted; the catalyst placement area is set along 2 pieces of stainless steel mesh coated with catalyst placed vertically in the axial direction, the stainless steel mesh next to the plasma discharge area is 2cm away from the discharge area, and the rest of the stainless steel mesh is separated by 1cm.

[0046] 40% CuO / MnO by mass fract...

Embodiment 3

[0051] Embodiment 3: O in the ultraviolet photocatalysis process 3 Production

[0052] refer to figure 2 In a, the ultraviolet photocatalytic device is a cylinder with a sealing cover, and the sealing cover is provided with a second waste gas inlet 1, a second waste outlet 2 and an ultraviolet lamp installation port 3, and the ultraviolet lamp installation port is There is a sleeve 4 sealingly connected with the sealing cover. The sleeve extends into the cylinder and is used to place the ultraviolet lamp tube 5. A catalyst-coated quartz boat 6 is arranged between the outer wall of the sleeve and the inner wall of the cylinder.

[0053] With 60% CuO / MnO 2 As a catalyst, coated on a total area of ​​20cm 2 On a quartz boat, the coating weight is 0.05g / cm 2 , and placed under the ultraviolet lamp, the main wavelength of the ultraviolet lamp is 185nm, the power is 36w, and two lamps are set. Firstly, under the condition of same light source input before and after catalyst coa...

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Abstract

The invention discloses an advanced oxidation coupling biological cleaning system based on ozone regulation and application thereof. The system comprises an advanced oxidation unit and a biological cleaning unit, wherein an ozone concentration regulating unit is connected between the advanced oxidization unit and the biological cleaning unit, and the ozone concentration regulating unit consists ofan ozone concentration online detection device and an air device; the ozone concentration online detection device is arranged at a waste gas outlet of the advanced oxidation unit and is communicatedwith the air device and an air inlet of the biological cleaning unit through a valve; the advanced oxidation unit is an ultraviolet light catalytic device or a low-temperature plasma concerted catalysis device, and the biological cleaning unit is a tower-type or box-type trickling filtration device. For waste gas treatment of VOCs with the concentration of 50 to 1000 mg / m<3>, the degradation rateis 85% to 100%, the generation rate of carbon dioxide is 80% to 90%, and the system is free of secondary pollution.

Description

technical field [0001] The invention relates to the purification of industrial VOCs waste gas, in particular to an advanced oxidation coupled biological purification process based on ozone regulation, which ensures stable and efficient operation of advanced oxidation units and biological purification units through the oxidation of ozone, and obtains better purification efficiency of VOCs. The technology belongs to the field of environmental pollution purification. Background technique [0002] Volatile organic compounds (Volatile Organic Compounds, VOCs) in the atmosphere have attracted widespread attention for decades because they are secondary pollutants (such as aerosols, O 3 ) and may have adverse effects on human health. VOCs mainly come from industrial processes such as petroleum refining, storage and transportation of petroleum products, and solvent use; in addition, vegetation emissions are also an important source of some highly active VOCs. VOCs pollution control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/76B01D53/72B01D53/70B01D53/66B01D53/86B01D53/84
CPCB01D53/66B01D53/70B01D53/72B01D53/76B01D53/84B01D53/86B01D53/8668B01D2257/708B01D2259/818Y02A50/20
Inventor 陈建孟王家德成卓韦陈东之於建明
Owner ZHEJIANG UNIV OF TECH
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