Plate-type membrane bioreactor, method for constructing same and method for purifying volatile organic waste gas

A technology of volatile organic compounds and bioreactors, applied in chemical instruments and methods, separation methods, membrane technology, etc., can solve problems such as exhaust with bioaerosols, unstable work and operation, secondary odor effects, etc., to achieve The effect of simple structure, small pressure drop, and easy engineering amplification

Active Publication Date: 2015-01-21
上海摩萃蒂环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the traditional biological method occupies a large area, requires additional humidification, has a large pressure drop, and is unstable in operation (there are problems such as flooding, foaming, and overflow); the traditional biological method is due to the contact between the gas phase and the liquid phase. , so that the exhaust gas contains bioaerosols and even produces secondary odor effects, so its application has relatively large limitations

Method used

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  • Plate-type membrane bioreactor, method for constructing same and method for purifying volatile organic waste gas
  • Plate-type membrane bioreactor, method for constructing same and method for purifying volatile organic waste gas
  • Plate-type membrane bioreactor, method for constructing same and method for purifying volatile organic waste gas

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Experimental program
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Effect test

Embodiment 1

[0036] Embodiment 1, flat-plate membrane bioreactor and its structure and using method

[0037] Such as Figure 1-3 As shown, the present invention provides a flat-plate membrane bioreactor for the purification of volatile organic waste gas, specifically as figure 1 shown. The flat-panel membrane bioreactor mainly comprises: parallel flat plates 6 and 6', and a flat film 5 fixed in parallel between the two flat plates; flat plates 6 and 6' have a rectangular shape on opposite sides Grooves are respectively formed into two closed areas 1 and 1' under the action of the interval of the flat film 5, and a layer of active biofilm 8 is attached and grown on the side of the flat film 5 facing the closed area 1', and the upper surface of the outer side of the flat plate 6 is , lower end have air inlet 2 and air outlet 2 ' respectively, and the upper and lower ends of the outside of plate 6 ' have water outlet 2 " and water inlet 2 ' " respectively, and these inlets and outlets com...

Embodiment 2

[0046] Embodiment 2, the concentration analysis of volatile organic compound

[0047] Gases such as benzene series, alkyd esters, aldehydes and ketones, and alkenynes in volatile organic compounds are analyzed by gas chromatography. For the treatment of membrane bioreactor, samples are taken at various time points, and the treatment efficiency is calculated according to the different inlet and outlet concentrations of different pollutants, and the curve is drawn according to the calculation results. The results are shown in Figure 4-7 .

[0048] The calculation formula of processing rate is: [(C in -C out ) / C in ]×100%

[0049] 2.1 Benzene series

[0050] Chromatographic column: PEG20M cross-linked column, 19m×0.25mm;

[0051] Column temperature: 40°C;

[0052] Carrier gas: N 2 ;

[0053] Peak order: 1) benzene, 2) toluene, 3) ethylbenzene, 4) p-xylene, 5) m-xylene, 6) o-xylene, 7) p-methylethylbenzene, 8) m-methyl Ethylbenzene, 9) o-methylethylbenzene.

[0054] ...

Embodiment 3

[0070] Embodiment 3, floor space comparison

[0071] Among the traditional biological methods for treating waste gas, the biological trickling filter has the widest applicability. Taking xylene as an example, the average removal capacity of biotrickling filter for xylene is 35g / (m 3 h), which represents the unit volume (l m 3 ) packing medium can degrade 35g of xylene pollutants per unit time (1h).

[0072] The present invention uses the flat membrane bioreactor to toluene removal capacity to be 0.2g / (m 2 h), assuming that the groove depth of the flat plate is 4mm, and the volume of the circulating active biological liquid is 3 times of the groove volume, so it takes about 0.68m to process 35g xylene in 1 hour 3 , less than 1m of traditional biological trickling filter 3 Filler volume, reduced by 31% volume.

[0073] This is due to the extremely thin thickness of the flat film, which is much smaller than the volume occupied by the filler, so the degradation capacity per...

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Abstract

The invention provides a plate-type membrane bioreactor used for purifying volatile organic waste gas. The plate-type membrane bioreactor comprises two plates and a flat membrane. The plates are parallelly arranged oppositely, the flat membrane is parallelly fixed between the plates, two rectangular grooves are respectively arranged on opposite side surfaces of the plates, and two closed areas are respectively formed under the separation action of the flat membrane; a gas inlet and a gas outlet are respectively arranged at the upper end and the lower end of the outer side of the first plate, a water outlet and a water inlet are respectively arranged at the upper end and the lower end of the outer side of the second plate, and the inlets and the outlets are respectively communicated with the corresponding closed areas; and an active biological membrane grows on the flat membrane in an attached manner. The invention further provides a method for constructing the bioreactor and a method for purifying the volatile organic waste gas. The bioreactor in a blocked design is convenient to use; the waste gas is not in direct contact with circulating active biological liquid, so that retention time and other parameters of gas phases and retention time and other parameters of liquid phases can be respectively controlled; and microorganisms cannot be carried in exhausted gas, so that secondary pollution is reduced.

Description

technical field [0001] The invention relates to the field of bioreactors, in particular to a flat-plate membrane bioreactor for purifying volatile organic waste gas and a construction method thereof, and a method for purifying volatile organic waste gas. Background technique [0002] Volatile organic compounds (VOCs) are one of the most common gaseous pollutants emitted by chemical, petrochemical and related industries. They have a great impact on climate change, plant growth and decline, and the health of humans and all animals. VOCs are also current PM 2.5 , ozone and other important precursor pollutants of urban air pollutants, reducing VOCs emissions is one of the important ways to achieve air quality standards. [0003] Conventional VOCs purification technologies include combustion, adsorption, condensation, photocatalytic oxidation, and plasma methods. Compared with conventional treatment technologies, the treatment of VOCs by biological purification has the advantag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D63/08B01D53/84B01D53/72
CPCY02A50/20
Inventor 修光利王震文陈远翔张萍詹天珍杨然张大年
Owner 上海摩萃蒂环保科技有限公司
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