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Two-phase biological deodorization method and two-phase biological deodorization device

A biological deodorization and biological reaction technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of no obvious division of the device, poor degradation effect, mutual interference, etc., to avoid competitive inhibition, Promote synergy, strong synergy effect

Inactive Publication Date: 2017-06-06
BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the current exhaust gas biological treatment methods use mixed heterotrophic bacteria and fungi to remove odor and VOCs pollutants in the exhaust gas. The device does not have obvious divisions, and the odor and VOCs of acidic and neutral substances are removed in the same area of ​​​​the device.
Due to the different requirements for the growth of microorganisms such as heterotrophic bacteria and fungi on humidity, pH, etc., the existing biological deodorization method is to mix and remove odorous pollutants, which often interfere with each other between different pollutants, and are easy to acidify and have poor degradation effects. high cost

Method used

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  • Two-phase biological deodorization method and two-phase biological deodorization device

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Experimental program
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Effect test

Embodiment 1

[0050] This embodiment provides a specific method for biological deodorization of malodorous gases, comprising the following steps:

[0051] 1) Humidification treatment

[0052] Utilize the nutrient solution to humidify the malodorous gas spray; the specific composition of the nutrient solution is (mass fraction): KH 2 PO 4 2%, MgSO 4 ﹒ 7H 2 O 0.05%, NH 4 Cl 0.01%, FeSO 4 ·7H 2 O 0.001%, CaCl 2 0.02%, the balance is water. Its pH is 5.8-6.2.

[0053] 2) acid treatment

[0054] Then acidophilic bacteria and fungi are used to acidify the humidified malodorous gas to degrade sulfur-containing and hydrophobic and refractory gaseous substances in the malodorous gas.

[0055] Wherein, the acidophilic bacteria are selected from T.thiooxidans and T.ferrooxidans, and the ratio of the two is 60:40; the fungi are selected from the genus Penicillium, Geotrichum (Geotrichum) and Cladosporium (Cladosporium), the ratio of the three is 40:30:30; wherein, the addition amount of t...

Embodiment 2

[0073] Adopt the method identical with embodiment 1 to process malodorous gas, difference is only in:

[0074]1. The concentrations of hydrogen sulfide, ammonia and butyric acid in the malodorous gas before treatment are 50.54mg / m3 3 , 22.3mg / m 3 , 25.71mg / m 3 ;

[0075] 2. The treatment time of humidification treatment, acid treatment and neutral treatment is 10s, 25s and 25s respectively, totaling 60s;

[0076] The concentrations of hydrogen sulfide, ammonia, and butyric acid in the exhaust gas from the gas port were detected to be 0.01mg / m 3 , 0.08mg / m 3 and 0mg / m 3 , lower than the discharge standard of odor pollutants, the removal rates are 99.98%, 99.64% and 100% respectively.

Embodiment 3

[0081] This embodiment provides a deodorizing device that can realize the deodorizing method of the above-mentioned embodiment 1 and 2, please refer to figure 1 . The material of the deodorizing device is plexiglass, the basic structure is cylindrical, the diameter is 90mm, and the total volume is 5L. It is divided into gas humidification zone 6 and acid phase biological reaction zone by two porous gas distribution plates 7 in turn. 8 and 12 three parts of the neutral phase biological reaction zone. A liquid discharge port 1 is opened on the side wall of the lower part of the gas humidification area 6, a liquid supply port 2 is opened above the liquid discharge port, an air inlet 3 is opened above the liquid supply port, and an aeration pipe is laid at the bottom of the gas humidification area 4. The nozzle is connected to the air inlet; a water level observation port 5 is opened on the side wall of the gas humidification area 6 .

[0082] Inert acidic phase composite packin...

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Abstract

The invention relates to a two-phase biological deodorization method and a two-phase biological deodorization device. According to the two-phase biological deodorization method, malodorous gas is sequentially subjected to humidification treatment, acid treatment and neutral treatment, wherein the humidification treatment refers to using a nutrient solution to carry out spray treatment on the malodorous gas; the acid treatment refers to using acidophilic bacteria and fungi to degrade the malodorous gas; the neutral treatment refers to using neutral heterotrophic bacteria to degrade the malodorous gas. The method and the device can effectively and thoroughly degrade multiple pollutants in the malodorous gas; furthermore, the land area occupied by a reactor is reduced, and the investment and treatment cost are lowered.

Description

technical field [0001] The invention belongs to the technical field of malodorous gas treatment, and in particular relates to a two-phase biological deodorization method and a deodorizing device for the malodorous gas generated by the treatment of municipal solid waste. Background technique [0002] In the process of municipal solid waste treatment, gas containing a variety of odorous pollutants will be produced. The odorous substances include inorganic substances such as hydrogen sulfide and ammonia, and organic substances such as mercaptans, low molecular fatty acids, amines, and halogenated hydrocarbons. Most of these malodorous substances are volatile and have low odor threshold. If these substances are not effectively controlled, they will cause harm to human health and the ecological environment. [0003] CN101020130A discloses a biological deodorization device in an exhaust gas purification system. The exhaust gas passes through the contact of the moisture and microo...

Claims

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Application Information

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IPC IPC(8): B01D53/84B01D53/75B01D53/52B01D53/72B01D53/68B01D53/58B01D53/54B01D53/48
CPCB01D53/48B01D53/485B01D53/52B01D53/54B01D53/58B01D53/68B01D53/72B01D53/75B01D53/84B01D2251/95B01D2257/70B01D2257/7027B01D2258/02Y02A50/20
Inventor 刘建伟段粹张波
Owner BEIJING UNIVERSITY OF CIVIL ENGINEERING AND ARCHITECTURE
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